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• Windows 7 boot issues

  - by Michael

  Ok, I tried to install linux and dual boot my laptop with 7 ultimate. I messed up. When I tried to boot to 7 it said no. Something along the lines of device not found. So I being young and stupid I uninstalled linux which I could boot into, and I still could not boot to windows. Next step was to run the startup fixes from the boot cd. Swing and a miss, I also ran the fixmbr and fixboot. Which brings us up to my current place. I installed 7 again on my blank partition in hopes I could access my other partion. No dice. So my question to yall is how can I fix my original filesystem or at least get to the stuff on it. In the new 7 install the old partion does not even have a drive letter. That is my sad story any help would be apreciated.

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• Can't connect to MySQL on CentOS 5 Error 13 - Permission Denied

  - by abszero

  Ok, I have an install of CentOS 5 running as a GuestOS in VirtualBox. The network card for the Cent box is bridged with that of my host OS so that the boxes can see each other. Cent has an IP of 192.168.1.108 and my Host box has an IP of .104. Everything, with regard to networking, seems to be working properly as I can access the Drupal install that is on the Cent box from a web browser on my host box by navigating to http://192.168.1.108 however when I try to configure the database for Drupal through the Drupal install interface I am getting the Can't connect to MySQL error. First I thought this might of been a Firewall issue so I stopped iptables but that had no effect. I thought maybe the user I had setup did not have access to the server so I tried root and that did not work. Searching on the net said that I needed to provide a bind-address parameter to my.cnf so I did that with no change. (As a side note the length of my my.cnf file was MUCH shorter than the ones presented online. In fact under mysqld all I have are datadir, socket, user, and bind-address. Is this normal or should the file be more verbose?) After a few hours of messing with permissions and such I tried using 'localhost' as the value for the database server, from my HOST OS, and the Drupal install kicked off without a problem. So while my issue is resolved I am curious as to why 'localhost' works and why 192.168.1.108 did not? Is there something i need to do to specifically access the MySQL box via the aforementioned IP? Thanks.

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• USB Device Not Recognized

  - by Franky Chanyau

  Ok this one gets a little bit complicated but bare with me :D A client brought her computer in to be fixed about a week ago, she says she tried charging a new phone she bought from china and immediately after her usb keyboard and mouse stopped working (typical). I had a quick look at it but because I did not have time, I did a simple system restore and it seemed as if the issue was fixed. I promptly sent it back to her but a few days back she called saying that the issue has returned. Turns out the computer was riddled with some virus that also corrupted her XP install so I had to format the whole thing(yes I tried repairing). I hoped that the format would fix the keyboard and mouse issue but the whole thing has escalated and the computer will throw the "USB Device not recognized" error when I plug anything into the many usb ports it has. I have installed all the drivers (including the chip set drivers) for the pc and even tried the unplugging from the power for a while trick, still no luck. I am sure it is not a hardware issue, but may be wrong. This is way over my head. Can anyone help? Computer: HP Compaq DC7100, Intel Pentium 4, 512mb RAM OS: Windows XP Professional SP2

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• Server 2012, Jumbo Frames - should I expect problems?

  - by TomTom

  Ok, this sound might stupid - but is there any negative on just enabling jumbo frames in practice? From what I understand: Any switch or ethernet adapter that sees a jumbo frame it can not handle will just drop it. TCP is not a problem as max frame size is negotiated in the setinuo phase. UCP is a theoretical problem as a server may just send a LARGE UDP packet that gets dropped on the way. Practically though, as UDP is packet based, I do not really think any software WOULD send a UDP packet larger than 1500 bytes net without app level configuration changes - at least this is how I do my programming, as it is quite hard to get a decent MTU size for that without testing yourself, so you fall back in programming to max 1500 packets. The network in question is a standard small business network - we upgraded now from a non managed 24 port switch to a 52 port switch with 4 10g ports (netgear - quite cheap) and will mov a file server to 10g for also ISCSI serving. All my equipment on the Ethernet level can handle minimum 9000 bytes and due to local firewalls I really want to get packets larger (less firewall processing), but the network is also NAT'ed to the internet. On top, different machines move around (download) large files (multi gigabyte area) quite often for processing. The question is - can I expect problems when I just enable jumbo frames? Again, this is not totally ignorance - I just don't see programs sending more than 1500 byte UDP packets (if that is a practical problem please tell me) and for TCP the MTU is negotiated anyway. if there is a problem I can move to a dedicated VLAN, but this has it's own shares of problems as basically most workstations must then be on both VLAN's.

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• Multiple static WAN IP addresses to single LAN subnet

  - by Jessy Houle

  Below is my home network topology. I currently have 5 static IP addresses, 3 of which are in use by 3 routers. These routers in-turn subnet internal networks and port forward. I use my SSL VPN appliance to remote home from work or on the road. At this point I can remotely administer my Windows Server. I know the network is setup wrong, I was matching existing hardware the best I knew how. http://storage.jessyhoule.com.s3.amazonaws.com/network_topology.jpg Ok this said, here is the problem... One of my websites on my Windows Server now needs to be secure (SSL using port 443). However, I'm already port forwarding port 443 to my VPN appliance. Furthermore, if I'm going to have to reconfigure the network, I would really like to be able to use the SSL VPN to remotely administer all machines. I mentioned this to a friend of mine, who said that what I was looking for was a firewall. Explaining that a firewall would take in multiple static (WAN) IP addresses, and still allow all internal devices to be on the same network. So, basically, I could supply my SSL VPN appliance it's very own static (WAN) IP address routing, and yet have it on the same internal network (192.168.1.x) as all my other devices. The first question is... Does this sound right? Secondly, would you suggest anything different? And, finally, what is the cheapest way to do this? I am started down the road of downloading/installing untangle and smoothwall to see if they will do the job, hoping they take multiple static (WAN) IP addresses. Thank you in advance for your answers. -Jessy Houle

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• ssh_exchange_identification: Connection closed by remote host

  - by rick

  Firstly, I know that this question has been asked a million times, and I have read everything I can find and still cannot fix the problem. i am encountering this issue when ssh'ing in from my mac to my Ubuntu server on a fresh install of Ubuntu (I reinstalled because of this issue). I have SSH portmapped to 7070 because my ISP is blocking 22. On the client: bash: ssh -p 7070 -v [email protected] debug1: Reading configuration data /etc/ssh_config debug1: Connecting to address.org port 7070. debug1: Connection established. debug1: identity file /home/me/.ssh/identity type -1 debug1: identity file /home/me/.ssh/id_rsa type 1 debug1: identity file /home/me/.ssh/id_dsa type -1 ssh_exchange_identification: Connection closed by remote host Here's what I have done to try to resolve the issue: Made sure my maxstartups is ok: bash: grep MaxStartups /etc/ssh/sshd_config #MaxStartups 10:30:60 Made sure hosts.deny is clear of denials. Made sure hosts.allow has my client IP. Clear out known_hosts on client Changed ownership of /var/run to root Made sure etc/run/ssh is Made sure /var/empty exists Reinstall openssh-server Reinstall ubuntu When I run telnet localhost, I get this: telnet localhost Trying ::1... Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused When I run /usr/sbin/sshd -t Could not load host key: /etc/ssh/ssh_host_rsa_key Could not load host key: /etc/ssh/ssh_host_dsa_key When I regenerate the keys with ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key I get the same error. I am pretty sure this is the issue. Can anyone help?

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• How to cache authentication in Linux using PAM/Kerberos authentication (for CVS)?

  - by Calonthar

  We have several Linux servers that authenticate Linux user passwords on our Windows Active Directory Server using PAM and Kerberos 5. The Linux distro we use is CentOS 6. On one system, we have several Version Control Systems like CVS and Subversion, both of which authenticate users throug PAM, such that users can use their normal Unix resp. Windows AD accounts. Since we started using Kerberos for password authentication, we experienced that CVS on a client machine is often much slower in establishing a connection. CVS authenticates the user on every request (eg. cvs diff, log, update...). Is is possible to cache the credentials that kerberos uses, sucht that is does not need to ask the Windows AD server every time a user executes a cvs action? Our PAM config /etc/pam.d/system-auth looks like the following: auth required pam_env.so auth sufficient pam_unix.so nullok try_first_pass auth requisite pam_succeed_if.so uid >= 500 quiet auth sufficient pam_krb5.so use_first_pass auth required pam_deny.so account required pam_unix.so broken_shadow account sufficient pam_succeed_if.so uid < 500 quiet account [default=bad success=ok user_unknown=ignore] pam_krb5.so account required pam_permit.so password requisite pam_cracklib.so try_first_pass retry=3 password sufficient pam_unix.so md5 shadow nullok try_first_pass use_authtok password sufficient pam_krb5.so use_authtok password required pam_deny.so session optional pam_keyinit.so revoke session required pam_limits.so session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid session required pam_unix.so session optional pam_krb5.so

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• Triple monitor setting in Linux with USB-HDMI adapter

  - by Oscar Carballal

  I'm trying to set up a triple monitor desktop at my office using Fedora 17, but it seems impossible, let me explain the setting: Laptop ASUS K53SD with 2 graphic cards, Intel and nVidia (Screen controled by Intel card) 24" Full HD monitor connected to the HDMI output (controlled by Intel card) 23" Full HD monitor connected to an USB-HDMI adapter (via framebuffer in /dev/fb2, apparently) VGA output (not used) controlled by nVidia card First of all, the USB-HDMI adapter works perfectly, it gives me a green screen (which means the communication is OK) and I can make it work if I set up a single monitor setting via framebuffer in Xorg. Here I leave the page where I got the instructions: http://plugable.com/2011/12/23/usb-graphics-and-linux Now I'm trying to set up the the two main monitors (laptop and 24") with the intel driver and the 23" with the framebuffer, but the most succesful configuration I get is the two main monitors working and the third disconnected. Do you have any idea what can I do to make this work? Here I leave my xRandr output and my Xorg conf: -> xrandr Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 8192 x 8192 LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1366x768 60.0*+ 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA2 disconnected (normal left inverted right x axis y axis) HDMI1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 531mm x 299mm 1920x1080 60.0*+ 50.0 25.0 30.0 1680x1050 59.9 1680x945 60.0 1400x1050 74.9 59.9 1600x900 60.0 1280x1024 75.0 60.0 1440x900 75.0 59.9 1280x960 60.0 1366x768 60.0 1360x768 60.0 1280x800 74.9 59.9 1152x864 75.0 1280x768 74.9 60.0 1280x720 50.0 60.0 1440x576 25.0 1024x768 75.1 70.1 60.0 1440x480 30.0 1024x576 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 720x576 50.0 848x480 60.0 720x480 59.9 640x480 72.8 75.0 66.7 60.0 59.9 720x400 70.1 DP1 disconnected (normal left inverted right x axis y axis) 1920x1080_60.00 60.0 The Xorg file: # Xorg configuration file for using a tri-head display Section "ServerLayout" Identifier "Layout0" Screen 0 "HDMI" 0 0 Screen 1 "USB" RightOf "HDMI" Option "Xinerama" "on" EndSection ########### MONITORS ################ Section "Monitor" Identifier "USB1" VendorName "Unknown" ModelName "Acer 24as" Option "DPMS" EndSection Section "Monitor" Identifier "HDMI1" VendorName "Unknown" ModelName "Acer 23SH" Option "DPMS" EndSection ########### DEVICES ################## Section "Device" Identifier "Device 0" Driver "intel" BoardName "GeForce" BusID "PCI:0:02:0" Screen 0 EndSection Section "Device" Identifier "USB Device 0" driver "fbdev" Option "fbdev" "/dev/fb2" Option "ShadowFB" "off" EndSection ############## SCREENS ###################### Section "Screen" Identifier "HDMI" Device "Device 0" Monitor "HDMI1" DefaultDepth 24 SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "USB" Device "USB Device 0" Monitor "USB1" DefaultDepth 24 SubSection "Display" Depth 24 EndSubSection EndSection

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• Using my old PC as a web/file server?

  - by Garrett

  I have an old desktop computer that I've been trying to sell for AGES. I guess nobody is looking for computers because it was advertised at a dirt cheap price on craigslist, local papers, etc. Anyways, I was wondering if it would be worth it to set it up as a home file server, a web dev server (I have a web host for actual production use), and maybe host a few server applications (ex: ventrillo). The computer is actually an old Dell that I cannibalized after the motherboard being destroyed by lightning, so it has fairly new parts in it. The specs are: P4 3.4GHz w/ HT and Artic Cooling Freezer 7 3GB DDR2 533 RAM 80GB hdd (will upgrade the hard drive if it's even worth using as a server) basic dvd rom 430 Watt Thermaltake PSU (it might be important to note that it is only 60% efficiency) ATI Radeon x600 256MB Antec 300 case It's not a really beefy machine, I just can't see giving it away or putting it in the corner to just collect dust. I have Windows Server 2008 R2 Standard and I am confident in my skills in operating most Linux operating systems. I'd also be using it to tinker with when I learn new things in my server admin classes (I'm finishing my 2nd year in college at the moment so I'm still learning) Also, my house is quite old and the electrical wiring is pretty poor (it MIGHT be up to code, then again, where I live most people don't even know what regulations are or let alone know how to spell it...) Would it be safe to leave it running all day and is it going to run up my electric bill because of the PSU efficiency? I only have 5mbit cable internet, but I won't be running very bandwidth intense services on it so it should be ok. I should elaborate on why I am concerned about the power. The circuits should be fine, but I'm more concerned about fire hazard. What is the likelihood that the server could cause an electrical fire? Again, thank you all for the feedback!

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• Unable to PPTP through NAT on Cisco 881

  - by MasterRoot24

  I'm trying to connect to a PPTP server which is sat behind a Cisco 881 NAT router. The server is running Ubuntu Server 12.04 and is running Poptop pptpd as the PPTP daemon listening for connections. As discussed in my other question, I'm trying to setup a Cisco 881 router to replace my old Linksys WAG320N. This same server and WAN connection worked fine with the WAG320N with no special configuration, other than allowing 1723 in through the firewall. On the Cisco 881, I'm using the newer ip nat enable or NAT NVI to setup static routes in through the firewall for the services running behind the router. My reason being that I can't run another copy of my live DNS domains internally with local IP addresses in. For the purposes of this question, though, I have rebuilt the router with ip nat inside/outside style NAT'ing, but this issue is still apparent. HTTP/SMTP/IMAP etc. all work ok from both the WAN and LAN interfaces of the router. I'm only having issues with SIP (see other question) and PPTP. My issue is that the GRE doesn't appear to be passing through NAT correctly and one end of the connection is not receiving GRE traffic when it should be, so the server hangs up the connection. Here's an example of /var/log/syslog with debug enabled in /etc/pptpd.conf: Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: MGR: Launching /usr/sbin/pptpctrl to handle client Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: local address = 192.168.1.50 Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: remote address = 192.168.1.51 Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: pppd options file = /etc/ppp/pptpd-options Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Client 82.132.248.216 control connection started Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Received PPTP Control Message (type: 1) Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Made a START CTRL CONN RPLY packet Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: I wrote 156 bytes to the client. Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Sent packet to client Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Received PPTP Control Message (type: 7) Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Set parameters to 100000000 maxbps, 64 window size Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Made a OUT CALL RPLY packet Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Starting call (launching pppd, opening GRE) Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: pty_fd = 6 Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: tty_fd = 7 Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: I wrote 32 bytes to the client. Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: CTRL: Sent packet to client Dec 11 21:06:30 <HOSTNAME> pptpd[22627]: CTRL (PPPD Launcher): program binary = /usr/sbin/pppd Dec 11 21:06:30 <HOSTNAME> pptpd[22627]: CTRL (PPPD Launcher): local address = 192.168.1.50 Dec 11 21:06:30 <HOSTNAME> pptpd[22627]: CTRL (PPPD Launcher): remote address = 192.168.1.51 Dec 11 21:06:30 <HOSTNAME> pppd[22627]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded. Dec 11 21:06:30 <HOSTNAME> pppd[22627]: pppd 2.4.5 started by root, uid 0 Dec 11 21:06:30 <HOSTNAME> pppd[22627]: Using interface ppp0 Dec 11 21:06:30 <HOSTNAME> pppd[22627]: Connect: ppp0 <--> /dev/pts/3 Dec 11 21:06:30 <HOSTNAME> pptpd[22626]: GRE: Bad checksum from pppd. Dec 11 21:06:31 <HOSTNAME> pptpd[22626]: CTRL: Received PPTP Control Message (type: 15) Dec 11 21:06:31 <HOSTNAME> pptpd[22626]: CTRL: Got a SET LINK INFO packet with standard ACCMs Dec 11 21:07:00 <HOSTNAME> pppd[22627]: LCP: timeout sending Config-Requests Dec 11 21:07:00 <HOSTNAME> pppd[22627]: Connection terminated. Dec 11 21:07:00 <HOSTNAME> avahi-daemon[1042]: Withdrawing workstation service for ppp0. Dec 11 21:07:00 <HOSTNAME> pppd[22627]: Modem hangup Dec 11 21:07:00 <HOSTNAME> pppd[22627]: Exit. Dec 11 21:07:00 <HOSTNAME> pptpd[22626]: GRE: read(fd=6,buffer=6075a0,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs Dec 11 21:07:00 <HOSTNAME> pptpd[22626]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7) Dec 11 21:07:00 <HOSTNAME> pptpd[22626]: CTRL: Reaping child PPP[22627] Dec 11 21:07:00 <HOSTNAME> pptpd[22626]: CTRL: Client 82.132.248.216 control connection finished Dec 11 21:07:00 <HOSTNAME> pptpd[22626]: CTRL: Exiting now Dec 11 21:07:00 <HOSTNAME> pptpd[5803]: MGR: Reaped child 22626 As far as Cisco are concerned, all I need is ip nat source static tcp <SERVER LAN IP> 1723 interface FastEthernet4 1723 but of course this doesn't seem to the be helping the GRE traffic through as it should. Trying the connection to the LAN IP of the server from the same LAN as the server (behind the router), the PPTP connection works fine, so I'm confident that the server's config is ok. Furthermore, all I needed on my WAG320N was to open 1723 in the firewall. Here's my current router config: ! ! Last configuration change at 20:20:15 UTC Tue Dec 11 2012 by xxx version 15.2 no service pad service timestamps debug datetime msec service timestamps log datetime msec service password-encryption ! hostname xxx ! boot-start-marker boot-end-marker ! ! enable secret 4 xxxx ! aaa new-model ! ! aaa authentication login local_auth local ! ! ! ! ! aaa session-id common ! memory-size iomem 10 ! crypto pki trustpoint TP-self-signed-xxx enrollment selfsigned subject-name cn=IOS-Self-Signed-Certificate-xxx revocation-check none rsakeypair TP-self-signed-xxx ! ! crypto pki certificate chain TP-self-signed-xxx certificate self-signed 01 xxx quit ip gratuitous-arps ip auth-proxy max-login-attempts 5 ip admission max-login-attempts 5 ! ! ! ! ! ip domain list dmz.xxx.local ip domain list xxx.local ip domain name dmz.xxx.local ip name-server 192.168.1.x ip cef login block-for 3 attempts 3 within 3 no ipv6 cef ! ! multilink bundle-name authenticated license udi pid CISCO881-SEC-K9 sn xxx ! ! username admin privilege 15 secret 4 xxx username joe secret 4 xxx ! ! ! ! ! ip ssh time-out 60 ! ! ! ! ! ! ! ! ! interface FastEthernet0 no ip address ! interface FastEthernet1 no ip address ! interface FastEthernet2 no ip address ! interface FastEthernet3 switchport access vlan 2 no ip address ! interface FastEthernet4 ip address dhcp ip nat enable duplex auto speed auto ! interface Vlan1 ip address 192.168.1.x 255.255.255.0 no ip redirects no ip unreachables no ip proxy-arp ip nat enable ! interface Vlan2 ip address 192.168.0.x 255.255.255.0 ! ip forward-protocol nd ip http server ip http access-class 1 ip http authentication local ip http secure-server ! ! ip nat source list 1 interface FastEthernet4 overload ip nat source list 2 interface FastEthernet4 overload ip nat source static tcp 192.168.1.x 1723 interface FastEthernet4 1723 ! ! access-list 1 permit 192.168.0.0 0.0.0.255 access-list 2 permit 192.168.1.0 0.0.0.255 ! ! ! ! control-plane ! ! banner motd Authorized Access only ! line con 0 exec-timeout 15 0 login authentication local_auth line aux 0 exec-timeout 15 0 login authentication local_auth line vty 0 4 access-class 2 in login authentication local_auth length 0 transport input all ! ! end UPDATE 16/12/2012: The only progress that I have been able to make on this issue is that I'm confident that the issue is caused by the GRE tunnels (which are required for the PPTP connection to complete) are being blocked. When attempting a connection, I can see in show ip nat nvi translations that both a TCP translation on 1723 is setup and also a GRE translation is setup also. I appear to be able to see GRE related packets on the LAN that the server is on, so I am lead to believe that the server is sending(?) GRE packets, however running Wireshark on a client PC when attempting a connection shows absolutely no GRE packets. Whilst there are no configuration directives in my config posted above (that I can pin point) which would specifically block them, it would appear that the GRE packets are not being allowed in/out of the router's firewall, even though a NAT translation entry is setup to the server's LAN address. Would anyone be able to provide me with some help to ensure that GRE packets are not blocked by the router's firewall, so that this can be ruled out as a possible issue please?

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• How To Investigate/Restore MySQL Permissions? MySQL ERROR 1045 (28000): Access denied for user

  - by Recc

  ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) Debian. mysqld is listening on 3306 supposedly Telnet to 3306 works Also tried binding it specifically yo localhost and then 127.0.0.1 which made no difference However: # netstat -ln | grep mysql unix 2 [ ACC ] STREAM LISTENING 78993 /var/run/mysqld/mysqld.sock # mysql -P3306 -ptest ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) Things I've tried: dpkg-reconfigure mysql-server-5.1 Doesn't help http://www.debian-administration.org/articles/442 Doesn't help This command (source): UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root'; FLUSH PRIVILEGES; Doesn't help, in fact: Query OK, 0 rows affected (0.00 sec) Rows matched: 0 Changed: 0 Warnings: 0 So might the user be deleted? Extremely unlikely as all this started after packages update a colleague did and some separate services started screwing around but my colleague said he removed the offenders. Theres more: while # mysqld_safe --skip-grant-tables is running one can access the data tables, only with the valid passwords! So there's users and some authentication takes place hence the 0 rows affected above. Can the privileges tables be damaged somehow and how can I recreate/restore them when my only way of getting a mysql console is to skip them? Can I spare my reinstall of MySQL? Either way I did get a dump of the DBs now that I could get in with the above mode.

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• How to test nginx proxy timeouts

  - by mkorszun

  Target: I would like to test all Nginx proxy timeout parameters in very simple scenario. My first approach was to create really simple HTTP server and put some timeouts: Between listen and accept to test proxy_connect_timeout Between accept and read to test proxy_send_timeout Between read and send to test proxy_read_timeout Test: 1) Server code (python): import socket import os import time import threading def http_resp(conn): conn.send("HTTP/1.1 200 OK\r\n") conn.send("Content-Length: 0\r\n") conn.send("Content-Type: text/xml\r\n\r\n\r\n") def do(conn, addr): print 'Connected by', addr print 'Sleeping before reading data...' time.sleep(0) # Set to test proxy_send_timeout data = conn.recv(1024) print 'Sleeping before sending data...' time.sleep(0) # Set to test proxy_read_timeout http_resp(conn) print 'End of data stream, closing connection' conn.close() def main(): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind(('', int(os.environ['PORT']))) s.listen(1) print 'Sleeping before accept...' time.sleep(130) # Set to test proxy_connect_timeout while 1: conn, addr = s.accept() t = threading.Thread(target=do, args=(conn, addr)) t.start() if __name__ == "__main__": main() 2) Nginx configuration: I have extended Nginx default configuration by setting explicitly proxy_connect_timeout and adding proxy_pass pointing to my local HTTP server: location / { proxy_pass http://localhost:8888; proxy_connect_timeout 200; } 3) Observation: proxy_connect_timeout - Even though setting it to 200s and sleeping only 130s between listen and accept Nginx returns 504 after ~60s which might be because of the default proxy_read_timeout value. I do not understand how proxy_read_timeout could affect connection at so early stage (before accept). I would expect 200 here. Please explain! proxy_send_timeout - I am not sure if my approach to test proxy_send_timeout is correct - i think i still do not understand this parameter correctly. After all, delay between accept and read does not force proxy_send_timeout. proxy_read_timeout - it seems to be pretty straightforward. Setting delay between read and write does the job. So I guess my assumptions are wrong and probably I do not understand proxy_connect and proxy_send timeouts properly. Can some explain them to me using above test if possible (or modifying if required).

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• WSS Search fills 10 GB limit on SBS server 2011

  - by Kactus

  I've got a SBS Server 2011 Standard SP1 that isn't very busy. 2 Users local and 2 remote. We have sharepoint that has maybe a dozen small documents at most. I've just started getting the following two error occur Could not allocate space for object 'dbo.MSSBatchHistory'.'IX_MSSBatchHistory' in database 'WSS_Search_SERVER' because the 'PRIMARY' filegroup is full. Create disk space by deleting unneeded files, dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup. And CREATE DATABASE or ALTER DATABASE failed because the resulting cumulative database size would exceed your licensed limit of 10240 MB per database. Digging around in SQL manager I see that WSS Search DB file size is 10241MB, the log file is only 147 MB Firstly, why is WSS Search taking up so much space? How can I stop it from doing so, and what can I do now to get things running ok. I know about log file truncating and this isn't the case here since the log is tiny. Any help is appreciated. There is plenty of free space on the disk (791GB free) Thanks Kactus

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• Exchange backup verification shows no files

  - by Olaf

  [SBS2003SP2] If i read the exhange log it shows the backup contains no files just folders and the total size seems to be Ok. I i try to restore the folders are empty... But the 14 files that where backupped dissapeared in the verification log?! Other backups on the same medium turned out to be fine. Any idea what's wrong here? This is my log: Backup Status Operation: Backup Active backup destination: File Media name: "testbackup.bkf created 2-6-2010 at 11:25" Volume shadow copy creation: Attempt 1. Backup of "SERVER1\Microsoft Information Store\First Storage Group" Backup set #1 on media #1 Backup description: "Set created 2-6-2010 at 11:25" Media name: "testbackup.bkf created 2-6-2010 at 11:25" Backup Type: Normal Backup started on 2-6-2010 at 11:26. Backup completed on 2-6-2010 at 12:21. Directories: 4 Files: 14 Bytes: 26.842.932.104 Time: 55 minutes and 38 seconds Verify Status Operation: Verify After Backup Active backup destination: File Active backup destination: \backup\Server1\Backup Files\testbackup.bkf Verify of "SERVER1\Microsoft Information Store\First Storage Group" Backup set #1 on media #1 Backup description: "Set created 2-6-2010 at 11:25" Verify started on 2-6-2010 at 12:21. Verify completed on 2-6-2010 at 12:47. Directories: 4 Files: 0 Different: 0 Bytes: 26.842.932.104 Time: 25 minutes and 46 seconds

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• MySQL Not Turning On

  - by Shalin Shah

  I have an amazon ec2 instance running on the Amazon Linux AMI and its a micro instance. I wanted to install Django onto my server so I entered these commands wget http://www.mlsite.net/blog/wp-content/uploads/2008/11/go wget http://www.mlsite.net/blog/wp-content/uploads/2008/11/django.conf chmod 744 go ./go So after I was done, I ran sudo service httpd restart and sudo service mysqld restart and This is what came up for mysqld: Stopping mysqld: [ OK ] MySQL Daemon failed to start. Starting mysqld: [FAILED] So I deleted the django files /usr/local/python2.6.8/site-packages/django_registration.egg and I tried finding the error and I found out that in my /etc/my.cnf for the socket, it said socket=/var/lock/subsys/mysql.sock so I went to /var/lock/subsys/ and there was no mysql.sock. I tried creating one using vim but it still didn't work. Then I checked the error log and it said Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) So I am pretty much lost right now. I know it has something to do with mysql.sock If you might know a reason why this was caused could you please let me know? I have a wordpress site on my server, so i kind of need MySQL to work. Thanks!

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• How do I get basic ProxyPass to work on Apache 2.2.17?

  - by Ansis Malins

  I'm trying to get around the ERR_UNSAFE_PORT restriction in Chrome by making Apache reverse proxy other HTTP servers on the machine. I load mod_proxy with sudo e2enmod proxy I add ProxyPass /znc/ http://localhost:6667/ to my httpd.conf I restart Apache with sudo /etc/init.d/apache2 restart When I open up /znc/, I get 500 Internal Server Error. I added LogLevel debug, restarted apache, tried again, and got nothing suspicous: [Fri Oct 19 18:55:17 2012] [debug] proxy_util.c(1818): proxy: grabbed scoreboard slot 0 in child 21528 for worker http://localhost:6667/ [Fri Oct 19 18:55:17 2012] [debug] proxy_util.c(1934): proxy: initialized single connection worker 0 in child 21528 for (localhost) [Fri Oct 19 18:55:17 2012] [debug] proxy_util.c(1818): proxy: grabbed scoreboard slot 1 in child 21528 for worker proxy:reverse [Fri Oct 19 18:55:17 2012] [debug] proxy_util.c(1934): proxy: initialized single connection worker 1 in child 21528 for (*) [Fri Oct 19 18:55:17 2012] [notice] Apache/2.2.17 (Ubuntu) PHP/5.3.8 configured -- resuming normal operations [Fri Oct 19 18:55:17 2012] [info] Server built: Feb 14 2012 17:59:20 [Fri Oct 19 18:55:17 2012] [debug] prefork.c(1018): AcceptMutex: sysvsem (default: sysvsem) [Fri Oct 19 18:55:22 2012] [debug] proxy_util.c(1818): proxy: grabbed scoreboard slot 0 in child 21532 for worker http://localhost:6667/ [Fri Oct 19 18:55:22 2012] [debug] proxy_util.c(1837): proxy: worker http://localhost:6667/ already initialized [Fri Oct 19 18:55:22 2012] [debug] proxy_util.c(1934): proxy: initialized single connection worker 0 in child 21532 for (localhost) [Fri Oct 19 18:55:22 2012] [debug] proxy_util.c(1818): proxy: grabbed scoreboard slot 1 in child 21532 for worker proxy:reverse [Fri Oct 19 18:55:22 2012] [debug] proxy_util.c(1837): proxy: worker proxy:reverse already initialized [Fri Oct 19 18:55:22 2012] [debug] proxy_util.c(1934): proxy: initialized single connection worker 1 in child 21532 for (*) So I'm stumped at this point. What to do? I'm running Ubuntu Server 11.10. ZNC responds with a correct 200 OK and HTML when queried directly both from the local machine and the Internet.

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• ffmpeg: converting an avi to a reduced, shareable flv/mp4...

  - by meder

  I recently followed a guide and recompiled my ffmpeg so x264 is enabled. I used some generic settings to convert my 700 MB avi file to a mp4 file, the result was a 407MB mp4 file. The original avi file's settings: Codec: DX50 Resolution: 704x304 Frame rate: 23.976023 Stream 1 Codec: mpga Type: Audio Channels: 2 Sample rate: 48000 Hz Bitrate 179 kb/s Command I used: ffmpeg -i input.avi -acodec libfaac -ab 128k -ac 2 -vcodec libx264 -vpre hq -crf 22 -threads 0 output.mp4 The settings of the output file (output.mp4): Codec: avc1 Resolution: 704x304 Display resolution: 704x304 Frame rate: 11.988011 Stream 1 Codec: mp4a Type: Audio Channels: 2 Sample Rate: 48000 Hz Bits per sample: 16 Bitrate: 1536 kb/s The quality of the output mp4 is pretty nice, it seems as if it's pretty much the same as the original source. However, I'm trying to reduce the filesize and I'm not really sure whether I should go with an flv format or keep it mp4. The advantage the flv would have obviously is that it would be playable with a flash player ( I have come across some swf players which take a flash parameter to play an flv file ).. but maybe I could use the video element, as I'm only going to be displaying this video privately so I don't have to worry about supporting legacy browsers such as IE. Can someone recommend some settings to specify in order for the filesize to be around ~100-150MB or so? I don't mind a reduction in quality, nor do I mind resizing it - I was going to do it initially but I wasn't sure what the guidelines were ( if any ) for dealing with resolution.. since this video's is 704x304 would it still be ok if I forced it into one that isn't perfectly fit for the aspect ratio? I have no clue about that part. I realize that I could have probably specified 28 instead of 22 for the CRF, I'm not sure if I should do that as opposed to maybe specifying smaller resolution, which might make it smaller as well?

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• Can any postfix guru assist me determine how emails are still being sent via my server from unauthorized sources?

  - by Dave

  Hi all, I'm getting a little concerned as I run a small server hosting a number of websites and manage the email for a few dozen people. Just recently though I've had a couple of notifications from spamcop alerting me that spam has been sent from my server, and when I have a look over the logs from time to time I can indeed see that there are many repeated attempts of mail being sent from my server. Most of the time it gets knocked back from the destination servers but sometimes its getting through. Unfortunately I'm not linux or postfix expert, I can get by but had though I had my machine locked down quite securely, I don't allow relaying, when I check the online DNS/MX tools they tend to report my server as being OK so I'm not sure where to take it now and hoping someone might be able to throw me a few pointers. I get lots of entries like this in my MAIL.INFO log Jan 2 08:39:34 Debian-50-lenny-64-LAMP postfix/qmgr[15993]: 66B88257C12F: from=<>, size=3116, nrcpt=1 (queue active) Jan 2 08:39:34 Debian-50-lenny-64-LAMP postfix/qmgr[15993]: 614C2257C1BC: from=<[email protected]>, size=2490, nrcpt=3 (queue active) and Jan 7 16:09:37 Debian-50-lenny-64-LAMP postfix/error[6471]: 0A316257C204: to=<[email protected]>, relay=none, delay=384387, delays=384384/3/0/0.01, dsn=4.0.0, status=deferred (delivery temporarily suspended: host mx.fakemx.net[46.4.35.23] refused to talk to me: 421 mx.fakemx.net Service Unavailable) Jan 7 16:09:37 Debian-50-lenny-64-LAMP postfix/error[6470]: 5848C257C20D: to=<[email protected]>, relay=none, delay=384373, delays=384370/3/0/0.01, dsn=4.0.0, status=deferred (delivery temporarily suspended: host mx.fakemx.net[46.4.35.23] refused to talk to me: 421 mx.fakemx.net Service Unavailable) then there tends to be connection timeouts, so from what I see even though I had relaying disabled.. something is getting by and trying to send.. So if you can help that will be greatly appreciated, and any further logging/config info I can supply. Thanks

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• Windows Domain Chaos - Any Solving Approach

  - by Chake

  we are running an old Window 2003 Server as Domain Controller (DC2003). To safely migrate to Windows 2008 R2 we added a 2008 R2 (DC2008R2) to the domain as domain controller (adprep etc.). After dcpromo on DC2008R2 everything seemed to be ok. The new DC appeared under the "Domain Controlelrs" node. It wasn't checked at this time, if DC2008R2 can REALLY act as domain controller. Later we tried to shutdown DC2003 and ran into a total mess with non functional Exchange and Team Foundation Services. After that I got the job to fix... First i thought it could be an Problem with DC2008R2. So I removed it as Domain Controller and installed a new Windows 2008 R8 Server DC2008R2-2. I ran into similar Problems. I tried a bunch of stuff, but nothign helped. I won't list it, maybe I made an mistake, so I'm willing to redo it with your suggestions. To have a starting point I tried the best practise analyser whicht ended up with 24 "Compatible" and 26 "Not Compatible" tests. From these 26 tests 19 read the same. (I'm translating from german, so that may to be the exact wording) Problem: Using the Best Practise Analyser for Active Directory Domain Services (Active Directory Domain Services Best Practices Analyzer, AD DS BPA) no data can be be gathered using the name of the forest and the domain controller DC2008R2-2. I appreciate any suggestions, this really bothers me.

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• How to determine the Kerberos realm from an LDAP directory?

  - by tstm

  I have two Kerberos realms I can authenticate against. One of them I can control, and the other one is external from my point of view. I also have an internal user database in LDAP. Let's say the realms are INTERNAL.COM and EXTERNAL.COM. In ldap I have user entries like this: 1054 uid=testuser,ou=People,dc=tml,dc=hut,dc=fi shadowFlag: 0 shadowMin: -1 loginShell: /bin/bash shadowInactive: -1 displayName: User Test objectClass: top objectClass: account objectClass: posixAccount objectClass: shadowAccount objectClass: person objectClass: organizationalPerson objectClass: inetOrgPerson uidNumber: 1059 shadowWarning: 14 uid: testuser shadowMax: 99999 gidNumber: 1024 gecos: User Test sn: Test homeDirectory: /home/testuser mail: [email protected] givenName: User shadowLastChange: 15504 shadowExpire: 15522 cn: User.Test userPassword: {SASL}[email protected] What I would like to do, somehow, is to specify per-user basis to which authentication server / realm the user is authenticated against. Configuring kerberos to handle multiple realms is easy. But how to I configure other instances, like PAM, to handle the fact that some users are from INTERNAL.COM and some from EXTERNAL.COM? There needs to be an LDAP lookup of some kind where the realm and the authentication name is fetched from, and then the actual authentication itself. Is there a standardized way to add this information to LDAP, or look it up? Are there some other workarounds for a multi-realm user base? I might be ok with a single realm solution, too, as long as I can specify the user name - realm -combination for the user separately.

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• nginx and proxy_hide_header

  - by giskard

  When I curl for a URL I get this answer back: > < HTTP/1.1 200 OK < Server: nginx/0.7.65 < Date: Thu, 04 Mar 2010 12:18:27 GMT < Content-Type: application/json < Connection: close < Expires: Thu, 04 Mar 2010 12:18:27 UTC < http.context.path: /1/ < jersey.response: com.sun.jersey.spi.container.ContainerResponse@17646d60 < http.custom.headers: {Content-Type=text/plain} < http.request.path: /2/messages/latest.json < http.status: 200 < Transfer-Encoding: chunked I want to remove < http.context.path: /1/ < jersey.response: com.sun.jersey.spi.container.ContainerResponse@17646d60 < http.custom.headers: {Content-Type=text/plain} < http.request.path: /2/messages/latest.json < http.status: 200 So I used the proxy_hide_header directive in this way: location / { if ($arg_id) { proxy_pass http..authorized; break; } proxy_pass http..anonymous; proxy_hide_header http.context.path; proxy_hide_header jersey.response; proxy_hide_header http.request.path; proxy_hide_header http.status ; } But it doesn't work. any clues?

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• Permissions nightmare - tried all I know

  - by Ben

  Working on a new client's dev site, which is a wordpress install on a Plesk box. I have SSH root access, and FTP access through a separate account. What I've done so far Initially I couldn't make any changes to any files at all. The permissions on all the template files looked a little screwy (644), so I figured change them to allow group, and add myself to the group: CHMOD Recursive on the theme folder to set everything to 664 Quickly realised I'd broken it, set the folders to 755, kept files as 664 Ownership on all files is a mixture of root:root and 500:500 (there is no user nor group with the ID of 500 on the server). Added myself to the group 'root' so I could modify the files too The Problem This worked OK, in terms of being able to edit the existing files, so I began working. However, I can't upload to the directory, even having run CHOWN -R root:root templatefolder/ and being in the root group. I feel like I must be missing something obvious, and it's doing my head in. Questions: Files in the install owned by 500 with group 500 - I've looked in /etc/group and /etc/passwd and there is no user nor group with this ID. Is that left over from another developer's setup or the previous server (they moved recently)? Is being in the 'root' group enough, or do I need to own the theme folder as 'myftpuser' in order to upload and create new files? Like I say, I have edit access, so I got myself this far. I'm now questioning what to do next!

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• repo sync "CyanogenMod/android_prebuilt" size and resume capability.?

  - by james

  I'm downloading CyanogenMod-10.1 source on a low speed broadband. About 4GB of source is downloaded . In that 4GB, there is a big project "CyanogenMod/android_frameworks_base" which alone took 1GB of download without any interruption. Ok now, after 4GB of download, my internet got disconnected and I had to stop (ctrl + z) repo sync while it was downloading the project "CyanogenMod/android_prebuilt". Before I stopped repo sync the android_prebuilt got downloaded till 250MB and is at 42percent. I checked the working folder and there is a file "tmp_pack_df5CKb" of size 250MB in the path "$WORKING_DIR/.repo/projects/prebuilt.git/objects/pack/" . Then I restarted repo sync and it was downloading the android_prebuilt project. But I'm not sure if it was downloading from start or resuming from 250MB. While downloading this time , the previous "tmp_pack_df5CKb" isn't deleted and the content is being downloaded to a new file "tmp_pack_HPfvFG". I heard repo sync cannot be resumed for a project. But here, since the previous file isn't deleted I want to ask if android_prebuilt is resuming or downloading from start again? Now that my high speed internet is over (current speed 256kbps), I'm not sure if I can download the remaining ~4GB if single project is in size 500 MB.

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• Linux on HP Envy

  - by Oscar Godson

  OK, the Ubuntu forums aren't helping and I thought maybe you guys here could help. First off, does anyone know the best flavor of Linux to use on an HP Envy? what has the best support out of the box? If not, does anyone know how the hell to get the following to work on Ubuntu 10.04: The touchpad to work at all? Right now, right clicking doesnt work at at all, and left clicks dont work while you have another finger on the pad at all. It jumps all over. ALSO, the multi-touch isn't clickable, but it's for sure a multi-touch touchpad. Works in W7 and can do things like a MBP in W7 The computer feels like it's on fire... i think im missing some driver. Seems odd that the random meta keys like calc, email, brightness, right click, etc work, but not the touchpad? The video card seems fine, but i haven't tested compiz fully yet... Thanks so much to anyone who helps. i want to get back to linux after a couple years on Mac. :)

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• XP Pro freezes on welcome screen

  - by Peter B

  I have a problem that sounds much the same as http://superuser.com/questions/83101/how-to-diagnose-a-freeze-on-startup-in-windows-xp About every 2nd or 3rd boot, XP-Pro freezes on the Welcome page (the one showing the user name icons). The mouse moves the cursor OK, but clicking on an icon does nothing, and neither does any keystroke. If you press too many keys there is a beep and after that the mouse won't move the cursor anymore. The work-around is always to reboot into Safe mode and request a CHKDSK /R After this, the next boot is fine. There are no related entries in the Event log when the problem occurs. The only two entries are: "Microsoft (R) Windows (R) 5.01. 2600 Service Pack 3 Multiprocessor Free." "The Event log service was started." Update 1: Many thanks for that but I found no problems with any diagnostics I have run. But, I have managed to locate, and code round, the source of the problem - which is with whatever processing goes on behind the XP Welcome (as opposed to "classic") login screen. Unfortunately, having classic login means you don't get the useful Fast User Switching (FUS) login/switch mode. So, to retain this, my fix is: Add a Windows shutdown script (using gpedit.msc) to force "classic" mode for the first logon after next XP startup, by running: reg add "hklm\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v LogonType /t REG_DWORD /d 0 /f Add a Scheduled Task to run at User Logon that enables Welcome screen (and hence FUS) by running the same command with 1 instead of 0 after the /d flag. The task is run as a privileged user (who can run "reg add").

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