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• Sendmail Sends but never Delivers

  - by Jeremy

  I have tried 10 different emails hosted at Google, Yahoo!, GoDaddy, and some that are privately hosted, and each time I get the following errors. I have blocked sensitive information, but you will be able to see the errors. Feb 16 17:06:50 xxxxx sendmail[31824]: o1GM6ovJ031824: [email protected], ctladdr=www-data (33/33), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30054, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (o1GM6oJo031825 Message accepted for delivery) Feb 16 16:54:19 xxxxx sendmail[31625]: o1GLsJPP031625: [email protected], ctladdr=www-data (33/33), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30097, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (o1GLsJah031626 Message accepted for delivery) Feb 17 09:05:52 xxxxx sm-mta[10620]: o1H6Z3jM005734: to=<[email protected]>, ctladdr=<[email protected]> (33/33), delay=07:30:49, xdelay=01:15:36, mailer=esmtp, pri=571331, relay=aspmx3.googlemail.com. [209.85.222.4], dsn=4.0.0, stat=Deferred: Connection timed out with aspmx3.googlemail.com. Feb 17 10:35:23 xxxxx sm-mta[12828]: o1HEZwn8011833: to=<[email protected]>, ctladdr=<[email protected]> (33/33), delay=00:59:25, xdelay=00:12:36, mailer=esmtp, pri=300353, relay=aln-mailrelay.att.net. [12.102.252.75], dsn=4.0.0, stat=Deferred: Connection timed out with aln-mailrelay.att.net. If you take a look, they all send, but then (HOURS later) I get an error "stat=Deferred: Connection timed out with {server}". I'm at my wits end, because I use this same setup on each of my servers, and they all work.

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• Windows Server 2003 DHCP not handing out IPs

  - by SnOrfus

  I'm trying to setup a home server (to tinker with) as a domain controller. I've setup the domain and I've installed DHCP and setup a scope without any exclusions (with the default range of 192.168.0.1-254). My client machine is a Windows 7 (RC) machine and it has a connection but can't get an IP address. Even if I try setting the IP to a static 192.168.0.2 and there is still no connectivity. I can ping it from the server, but pinging the server from the client just times out. The only thing between the server and the client is a 24 port switch (D-Link DES-1024D). edit Ok, it turned out that the interfaces were setup backwards in the NAT settings (the internal nic connection was set to public and the external nic connection was set to private). I changed this and all was OK.... sort-of. Problem is now: If I set a static ip on the client (where I am typing this from) all is fine. BUT; when I set it to get it from DHCP, I get a correct IP from the server (192.168.0.2) but there is no internet on the client; but I can still ping the server fine from the client (which makes sense cause I was able to get an IP from it). edit I ended up just removing the Routing and DHCP server roles and just going with ICS for the time being until I get my hands on some better learning tools.

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• exim configuration: 503 AUTH command used when not advertised

  - by jrdioko

  I'm running a piece of software on a Windows server that sends email notifications via a remote SMTP server. It has very few configuration options, and only supports basic SMTP authentication without SSL/TLS. I have exim4 running on a Debian server that will be the SMTP server for this Windows program. It is set up with default configuration, plus allowing AUTH PLAIN and AUTH LOGIN unencrypted connections. I have successfully sent an email over telnet: telnet servername 25 ehlo test 250-AUTH PLAIN LOGIN ... auth plain XXX 235 Authentication succeeded mail from: ... ... However, the program I want to connect to this server fails to connect. To see why, I ran a packet sniffer during the connection, and see the following session: C: HELO hostname S: 250 Hello hostname C: AUTH LOGIN XXX | XXX S: 503 AUTH command used when not advertised | 500 unrecognized command C: QUIT S: 221 closing connection I'm not familiar enough with the SMTP protocol to understand what's going on here. What do I need to change on my exim4 SMTP server to allow for this connection to be made?

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• MTU, DSL router and stalling TCP

  - by user38843

  I am discovering stalling TCP connection problem. The problem arises when I try to scp stuff from remote system from my home network. My home network is connected to internet via PPPoE (ADSL+) and everything works perfectly once working from my home network. The ADSL router has MTU set to 1492 but with that setting the scp from remote system does not work - stalling! When I change the MTU on my router to 1500 the that scp works perfectly but internet accesses from my home network is very slow to most of the www sites - even local ones. Just wondering where the problem exists - my ISP blocking ICMP, etc? Thanks!

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• Windows Server 2003 DHCP not handing out IPs

  - by SnOrfus

  I'm trying to setup a home server (to tinker with) as a domain controller. I've setup the domain and I've installed DHCP and setup a scope without any exclusions (with the default range of 192.168.0.1-254). My client machine is a Windows 7 (RC) machine and it has a connection but can't get an IP address. Even if I try setting the IP to a static 192.168.0.2 and there is still no connectivity. I can ping it from the server, but pinging the server from the client just times out. The only thing between the server and the client is a 24 port switch (D-Link DES-1024D). edit Ok, it turned out that the interfaces were setup backwards in the NAT settings (the internal nic connection was set to public and the external nic connection was set to private). I changed this and all was OK.... sort-of. Problem is now: If I set a static ip on the client (where I am typing this from) all is fine. BUT; when I set it to get it from DHCP, I get a correct IP from the server (192.168.0.2) but there is no internet on the client; but I can still ping the server fine from the client (which makes sense cause I was able to get an IP from it). edit I ended up just removing the Routing and DHCP server roles and just going with ICS for the time being until I get my hands on some better learning tools.

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• VPN Split Tunneling - Pros and Cons and how to achieve?

  - by Theveloper

  Well this is the dilemma, I want remote clients to connect to my network and only route local access through the VPN. This is split tunneling, the client uses its internet connection for all other internet requests and the VPN tunnel to my network for local requests. There's a couple of issues that arise: split tunneling in Windows is achieved by unticking an option which reads "Use default gateway on remote network" in the TCP/IP settings of the client VPN connection. At any point the user can tick it and route all his internet traffic through my network eating away at my bandwidth and being cloaked by my IP address. This is unacceptable. Issue number 2 is that if the client is split tunneling, he becomes a gateway between the internet and my network, this is also unacceptable. My questions are: how does one achieve split tunneling serverside? And is the latter issue a valid con worthy of worry? Any thoughts would be appreciated!

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• Second ip address on same interface CentOS 6.3

  - by user16081

  I tried to add a second LAN addresses in CentOS 6.3 on a brand new install and it's not working. I installed a new copy of CentOS 5.7 and tried the same and it worked right away. Now I'm just trying to setup the alias on the same subnet and it's not working. what am i doing wrong, is this not possible on CentOS 6.3? second ip address on the same interface but on a different subnet CentOS 5.7 it works: DEVICE=eth0 BOOTPROTO=static BROADCAST=192.168.0.255 HWADDR=00:0C:29:01:6F:89 IPADDR=192.168.0.167 NETMASK=255.255.255.0 NETWORK=192.168.0.0 ONBOOT=yes DEVICE=eth0:0 BOOTPROTO=static BROADCAST=192.168.0.255 HWADDR=00:0C:29:01:6F:89 IPADDR=192.168.0.166 NETMASK=255.255.255.0 NETWORK=192.168.0.0 ONBOOT=yes On CentOS 6.3: does not work DEVICE=eth0 BOOTPROTO=static BROADCAST=192.168.0.255 HWADDR=00:0C:29:1E:DE:86 IPADDR=192.168.0.242 NETMASK=255.255.255.0 NETWORK=192.168.0.0 GATEWAY=192.168.0.1 ONBOOT=yes DNS1=205.134.232.138 DNS2=4.4.4.4 DEVICE=eth0:0 BOOTPROTO=static BROADCAST=192.168.0.255 HWADDR=00:0C:29:1E:DE:86 IPADDR=192.168.0.240 NETMASK=255.255.255.0 NETWORK=192.168.0.0 ONBOOT=yes # /etc/init.d/network restart Shutting down interface eth0: Device state: 3 (disconnected) [ OK ] Shutting down loopback interface: [ OK ] Bringing up loopback interface: [ OK Bringing up interface eth0: Active connection state: activated Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/3 [ OK ] # ping 192.168.0.240 PING 192.168.0.240 (192.168.0.240) 56(84) bytes of data. From 192.168.0.242 icmp_seq=2 Destination Host Unreachable Appreciate any advice, thanks Update: Perhaps this is relevant? On CentOS 5.7: # dmesg |grep eth eth0: registered as PCnet/PCI II 79C970A eth0: link up eth0: link up On 6.3: # dmesg | grep eth e1000 0000:02:00.0: eth0: (PCI:66MHz:32-bit) 00:0c:29:1e:de:86 e1000 0000:02:00.0: eth0: Intel(R) PRO/1000 Network Connection e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None 8021q: adding VLAN 0 to HW filter on device eth0 eth0: no IPv6 routers present

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• Why would Windows use slower network interface despite route metrics?

  - by tim11g

  On my previous notebook, the Dell/Broadcom wireless adapter had an option to automatically disable wireless when a wired network is connected, so I never dealt with multiple active interfaces. My current system has an Intel wireless adapter, and they apparently haven't figured out how to turn it off when there is a wired connection. Unless I explicitly remember to disable wireless when docked, the connection is active. That shouldn't be a problem (in theory), since the route metric will cause traffic to go over the fastest network (as indicated by the lowest metric in the routing table). Apparently not - I'm running a backup and seeing the throughput at 25Mbps or so (which is consistent with 802.11g) when a perfectly good Gigabit Ethernet interface is also connected. IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.1.254 192.168.1.104 10 0.0.0.0 0.0.0.0 192.168.1.254 192.168.1.109 25 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 Windows has correctly identified the Ethernet interface (.104) and assigned it the lower (preferred) metric. So the Ethernet interface should be used exclusively, right? Why is the Ethernet connection not being used? What other factors are involved? (This is with Windows 7 if it makes a difference)

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• Nested RDP and ILO/VMWare console sessions, latency and keystroke repetition

  - by ewwhite

  I'm working on a remote server installation entirely through ILO. Due to the software application and environment, my access is restricted to a Windows server that I must access through RDP. Going from that system to the target server is accomplished via HP ILO2 or ILO3. I'm trying to run a CentOS installation in an environment where I can't use a kickstart. I'm doing this via text mode, but the keystrokes are repeating randomly and it's difficult to select the proper installation options. For example: ks=http://all.yourbase.org/kickstart/ks.cfg ends up looking like: ks====httttttp://allll..yourbaseee.....org/kicksstart/ks.cccfg I'm doing this using Microsoft's native RDP client (on Mac and Windows). I've also noticed this before when running installations or doing remote work in nested sessions. Same for typing into a VMWare console in some cases. Is there a nice fix for this, or it it simply a function of the protocol(s)?

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• Prevent zsh from trying to expand everything

  - by Attila O.

  Recently switched from bash, I noticed that zsh will try to expand every command or argument that looks like it has wildcards in it. So the following lines won't work any more: git diff master{,^^} zsh: no matches found: master^^ scp remote:~/*.txt . zsh: no matches found: remote:~/*.txt The only way to make the above commands work is to quote the arguments, which is quite annoying. Q: How do I configure zsh to still try to expand wildcards, but if there are no matches, just pass on the argument as-is? EDIT: Possibly related: scp with zsh : no matches found

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• ¿How to set maximum downloads or sockets or whatever, in Apache and or PHP?

  - by Petruza

  I made a PHP script, running from my localhost, that streams files from a remote server and serves them. I do this so I can rename the files prior to the browser shows the dialog to save them, through header( "filename:..." ) Anyway, although the remote server allows many simultaneous file downloads at good rates, when they stream through my local apache/php I can't get more than 6 at the same time. When I try to download the 7th, the save as dialog appears as soon as the sixth download has finished. I'm almost sure this is some limit imposed by php.ini or apache's httpd.ini, but don't have a clue about which one is it. do you?

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• RHEL 5/CentOS 5 - sshd becomes unresponsive

  - by ewwhite

  I have a number of CentOS 5.x and RHEL 5.x systems whose SSH daemons become unresponsive, preventing remote logins. The typical error from the connecting side is: $ ssh db1 db1 : ssh_exchange_identification: Connection closed by remote host Examining /var/log/messages after a forced reboot shows the following leading up to the restart: Dec 10 10:45:51 db1 sshd[14593]: fatal: Privilege separation user sshd does not exist Dec 10 10:46:02 db1 sshd[14595]: fatal: Privilege separation user sshd does not exist Dec 10 10:46:54 db1 sshd[14711]: fatal: Privilege separation user sshd does not exist Dec 10 10:47:38 db1 sshd[14730]: fatal: Privilege separation user sshd does not exist These systems use LDAP authentication and the nsswitch.conf file is configured to look at local "files" first. [root@db1 ~]# cat /etc/nsswitch.conf # # /etc/nsswitch.conf # passwd: files ldap shadow: files ldap group: files ldap hosts: files dns The Privilege-separated SSH user exists in the local password file. [root@db1 ~]# grep ssh /etc/passwd sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin Any ideas on what the root cause is? I did not see any Red Hat errata that covers this.

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• Is there a serious issue with setting the SUID bit on tcpdump?

  - by Dean

  I'm running tcpdump on a remote machine, and piping the output to Wireshark on my local machine over SSH. In order to do this, I had to set the SUID bit on tcpdump. For background, the remote machine is an Amazon EC2 running "Amazon Linux AMI 2012.09". On this image, there is no root password, and it is not possible to log in as root. You can't use sudo without a TTY, and therefore you have to set the SUID. What are the practical risks of setting this bit on tcpdump? Is there any need to be paranoid? Should I unset it whenever I'm not capturing?

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• Accessing A Shared Directory That Has An Account White List

  - by Xan

  I'm on a LAN here at work and I have my desktop sharing some of my project folders. I can access the computer via \\ComputerIP\, but I can't actually open any of the folders. Upon attempting, I get the error: Windowns cannot access \ComputerIP\ProjectFolder You do not have permission to access \ComputerIP\ProjectFolder. Contact your network administrator to request access. For more information about permissions, see Windows Help and Support Now, this is understood considering I've made it so that you had to utilize the "Project" credentials to connect. I have a user account on my main computer hosting these shared folders that gives full access to the folders if you are this "Project" user. I can Remote Desktop the computer just fine from my laptop using either set of credentials. When I try to open these folders it doesn't give me the option to attempt to apply any credentials like it does when I remote desktop. How am I supposed to gain access to these folders?

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• IIS running but not serving content

  - by Kyle

  I have an internal dev server running Windows 2k8 R2 with the Web and FTP Server roles set up which won't serve any content at all. Trying to connect from another host via telnet yields 'connection failed': c:\>telnet devserver 80 Connecting To devserver...Could not open connection to the host, on port 80: Conn ect failed Using netstat -an | find "80" on the dev server returns no connections on port 80 (a few on 1801, etc) tcpview confirms this, listing no open connections on port 80. The following services related to the Web role are running: World Wide Web Publishing Service Application Host Helper Service Microsoft FTP Service (ftp connections to port 21 are granted) Windows Process Activation Service The default website bindings are: Type Host Name Port IP Address Binding Information http 80 * net.tcp 808:* net.pipe * net.msmq localhost msmq.formatname localhost When setting up a new application under the default site, the test function passes both connection/authorisation only if the 'connect as' user is local admin, otherwise the test errors with 'invalid application path'. At no point is the W3SVC service PID bound to port 80 (it is running and bound to 21 for ftp). There are no W3SVC log directory at c:\inetpub\logs\LogFiles\ (only FTPSVC2), and no HTTPERR directory at c:\windows\system32\ or c:\windows\system32\logfiles\. There do not appear to be any related errors in the event logs. I'd really appreciate any thoughts on be a good place dig into what's (not) going on here!

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• How can I make it difficult to install a new operating system on a certain computer?

  - by D W

  I want to host a website on a desktop computer running Ubuntu with a Windows virtual machine. I will give away the computer in exchange for a number of months of remote web hosting. I want to add some kind of lock (hardware or otherwise) so that the end users will have difficulty just reinstalling Windows and using the machine as they want, in contradiction to the contract. Ideally, I'd want the machine to die if reinstallation of the OS is attempted. It doesn't have to be completely insurmountable, but it has to be difficult enough to prevent casual reinstallation. Perhaps on bootup the system can check whether certain files exist on the computer and refuse to boot if they do not. I don't know if this is possible, but maybe BIOS is password protected, and searches for files before boot up. The files it looks for could be date sensitive, i.e. require remote replacement on a schedule.

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• Tutorial for configuring OpenVPN [on hold]

  - by user2699451

  I have been through 10+ tutorials on setting up a OpenVPN, and each tutorial gives a different problem... Does anyone know of a decent and helpful website/tutorial which I could go to to get it set up? I have been battling through it for almost 2 months now. Yes, I have also bugged forums.openvpn, but I think I have "reached my post limit" with them. I have to configure it remotely via ssh. UPDATE: okay, I have been asked to be more clear on the topic I followed this tutorial (as a example) - http://www.servermom.com/how-to-build-openvpn-server-on-centos-6-x/732/ I had no issues setting up, etc. except when I boot into windows and run the OpenVPN GUI Client, it connects and gives this error: WARNING: Bad encapsulated packet length from peer (21331), which must be 0 and <= 1576 -- please ensure that --tun-mtu or --link-mtu is equal on both peers -- this condition could also indicate a possible active attack on the TCP link -- [Attemping restart...] Here is my server config: port 1194 #- port proto udp #- protocol dev tun tun-mtu 1500 tun-mtu-extra 32 mssfix 1450 reneg-sec 0 ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt cert /etc/openvpn/easy-rsa/2.0/keys/server.crt key /etc/openvpn/easy-rsa/2.0/keys/server.key dh /etc/openvpn/easy-rsa/2.0/keys/dh1024.pem plugin /usr/lib64/openvpn/plugin/lib/openvpn-auth-pam.so /etc/pam.d/login #- Co$ #plugin /etc/openvpn/radiusplugin.so /etc/openvpn/radiusplugin.cnf #- Uncomment$ client-cert-not-required username-as-common-name server 10.8.0.0 255.255.255.0 push "redirect-gateway def1" push "dhcp-option DNS 8.8.8.8" push "dhcp-option DNS 8.8.4.4" keepalive 5 30 comp-lzo persist-key persist-tun status 1194.log verb 3 and my client config: client dev tun proto udp remote [server ip] 1194 # - Your server IP and OpenVPN Port resolv-retry infinite nobind tun-mtu 1500 tun-mtu-extra 32 mssfix 1450 persist-key persist-tun ca ca.crt auth-user-pass comp-lzo reneg-sec 0 verb 3 OpenVPN Client Log: Thu Oct 31 11:51:29 2013 OpenVPN 2.0.9 Win32-MinGW [SSL] [LZO] built on Oct 1 2006 Thu Oct 31 11:51:44 2013 IMPORTANT: OpenVPN's default port number is now 1194, based on an official port number assignment by IANA. OpenVPN 2.0-beta16 and earlier used 5000 as the default port. Thu Oct 31 11:51:44 2013 WARNING: No server certificate verification method has been enabled. See http://openvpn.net/howto.html#mitm for more info. Thu Oct 31 11:51:44 2013 LZO compression initialized Thu Oct 31 11:51:44 2013 Control Channel MTU parms [ L:1576 D:140 EF:40 EB:0 ET:0 EL:0 ] Thu Oct 31 11:51:44 2013 Data Channel MTU parms [ L:1576 D:1450 EF:44 EB:135 ET:32 EL:0 AF:3/1 ] Thu Oct 31 11:51:44 2013 Local Options hash (VER=V4): '2547efd2' Thu Oct 31 11:51:44 2013 Expected Remote Options hash (VER=V4): '77cf0943' Thu Oct 31 11:51:44 2013 Attempting to establish TCP connection with x.x.x.x:1194 Thu Oct 31 11:51:44 2013 TCP connection established with x.x.x.x:1194 Thu Oct 31 11:51:44 2013 TCPv4_CLIENT link local: [undef] Thu Oct 31 11:51:44 2013 TCPv4_CLIENT link remote: x.x.x.x:1194 // after this it just hangs, nothing happens So I dont know what I am doing wrong but I am getting a bit impatient and on each forum I post this, I get stupid/unrelated/unhelpful answers...

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• VPN on OSX disconnects after precisely 2 minutes and 30 seconds on specific network

  - by Tyilo

  When connecting to my own VPN server on a specific network, called public-network, my Mac disconnects the VPN connection after 2 minutes and 30 seconds. I have performed several tests and this is the result: It works fine until the 2:30 mark It doesn't matter which Mac I use, it still disconnects It doesn't matter which client I use, all of the following does the same: OSX system client, HMA! Pro VPN and Shimo It doesn't matter which protocol I use, at least all of these protocols does the same: PPTP, OpenVPN and L2TP over IPSec The same thing happens using my own VPN server and HMA!'s VPN server. All other clients (Windows/iPhone) can use any of these VPN servers and protocols without problem on public-network On OSX, all the protocols, clients and servers works fine on any other network So it seems that it is the combination of OSX, VPN & public-network that causes this. This is the syslog from my VPN server, when the disconnection happens: Feb 2 12:04:32 raspberrypi pptpd[31400]: CTRL: EOF or bad error reading ctrl packet length. Feb 2 12:04:32 raspberrypi pptpd[31400]: CTRL: couldn't read packet header (exit) Feb 2 12:04:32 raspberrypi pptpd[31400]: CTRL: CTRL read failed Feb 2 12:04:32 raspberrypi pptpd[31400]: CTRL: Reaping child PPP[31401] Feb 2 12:04:32 raspberrypi pppd[31401]: Hangup (SIGHUP) Feb 2 12:04:32 raspberrypi pppd[31401]: Modem hangup Feb 2 12:04:32 raspberrypi pppd[31401]: Connect time 2.5 minutes. Feb 2 12:04:32 raspberrypi pppd[31401]: Sent 3963649 bytes, received 362775 bytes. Feb 2 12:04:32 raspberrypi pppd[31401]: MPPE disabled Feb 2 12:04:32 raspberrypi pppd[31401]: Connection terminated. Feb 2 12:04:32 raspberrypi pppd[31401]: Exit. Feb 2 12:04:32 raspberrypi pptpd[31400]: CTRL: Client <ip-adress> control connection finished

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• Overriding routes on Openvpn client, iproute, iptables2

  - by sarvavijJana

  I am looking for some way to route packets based on its destination ports switching regular internet connection and established openvpn tunnel. This is my configuration OpenVPN server ( I have no control over it ) OpenVPN client running ubuntu wlan0 192.168.1.111 - internet connected if Several routes applied on connection to openvpn from server: /sbin/route add -net 207.126.92.3 netmask 255.255.255.255 gw 192.168.1.1 /sbin/route add -net 0.0.0.0 netmask 128.0.0.0 gw 5.5.0.1 /sbin/route add -net 128.0.0.0 netmask 128.0.0.0 gw 5.5.0.1 And I need to route packets regarding it's destination ports for ex: 80,443 into vpn everything else directly to isp connection 192.168.1.1 What i have used during my attempts: iptables -A OUTPUT -t mangle -p tcp -m multiport ! --dports 80,443 -j MARK --set-xmark 0x1/0xffffffff ip rule add fwmark 0x1 table 100 ip route add default via 192.168.1.1 table 100 I was trying to apply this settings using up/down options of openvpn client configuration All my attempts reduced to successful packet delivery and response only via vpn tunnel. Packets routed bypassing vpn i have used some SNAT to gain proper src address iptables -A POSTROUTING -t nat -o $IF -p tcp -m multiport --dports 80,443 -j SNAT --to $IF_IP failed in SYN-ACK like 0 0,1 0,1: "70","192.168.1.111","X.X.X.X","TCP","34314 > 81 [SYN] Seq=0 Win=5840 Len=0 MSS=1460 TSV=18664016 TSER=0 WS=7" "71","X.X.X.X","192.168.1.111","TCP","81 > 34314 [SYN, ACK] Seq=0 Ack=1 Win=5792 Len=0 MSS=1428 TSV=531584430 TSER=18654692 WS=5" "72","X.X.X.X","192.168.1.111","TCP","81 > 34314 [SYN, ACK] Seq=0 Ack=1 Win=5792 Len=0 MSS=1428 TSV=531584779 TSER=18654692 WS=5" "73","192.168.1.111","X.X.X.X","TCP","34343 > 81 [SYN] Seq=0 Win=5840 Len=0 MSS=1460 TSV=18673732 TSER=0 WS=7" I hope someone has already overcome such a situation or probably knows better approach to fulfill requirements. Please kindly give me a good advice or working solution.

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• Managing Active Directory Group Membership with a Non-Administrator Account In Server 2008

  - by Laranostz

  I am running Server 2008 R2 in an Active Directory Domain Environment. I have created a group in Active Directory and I have delegated management authority to that group to a user. I want this user to be able to add and remove accounts as needed from that group so that they are exercising some measurement of control without giving them other authority. When I have the user attempt to access the Active Directory Users & Computers Console it prompts them for Administrator credentials. They are using Remote Desktop to access the server, because they do not have Windows 7, and firewall rules prevent using the Remote Management Kit. I do not want to provide them with any level of Administrative rights except the minimum required for them to add/remove users from this group. There are two servers that 'talk' to each other in this isolated environment, a domain controller and a member server, both are only reachable through RDP. Any suggestions?

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• Socat and rich terminals (with Ctrl+C/Ctrl+Z/Ctrl+D propagation)

  - by Vi

  socat - exec:'bash -li',pty,stderr,ctty - bash: no job control in this shell What options should I use to get fully fledged shell as I get with ssh/sshd? I want to be able to connect the shell to everything socat can handle (SOCKS 5, UDP, OpenSSL), but also to have a nice shell which correctly interprets all keys, various Ctrl+C/Ctrl+Z, tab completion, up/down keys (with remote history). Update: Found "setsid" socat option. It fixes "no job control". Now trying to fix Ctrl+D. Update 2: socat file:`tty`,raw,echo=0 exec:'bash -li',pty,stderr,setsid,sigint,sane. Not it handles Ctrl+D/Ctrl+Z/Ctrl+C well, I can start Vim inside it, remote history is OK.

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• Running command transparently over ssh

  - by jnsg

  By transparently I mean forwarding of: stdin, stdout and stderr standard signals (SIGHUP or SIGINT would be great for a start) As an example, consider these invocations of a (pointless) local and remote command: $ `cat - > /dev/null; sleep 10` < /local/file $ ssh user@host "cat - > /dev/null; sleep 10" < /local/file I can interrupt the first one with ^C just fine. But if I try this during the second one it only affects ssh, leaving the command running on the remote server if cat has already finished. I know about launching sshwith -t, but this way I can't send data via stdin. Is this possible with ssh alone at all?

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• Proxification rulte for System process

  - by kseen

  I'm trying to configure Microsoft Visual Studio 2010 remote debugging and ran into issue: while connecting to remote computer running MSVSMON, client computer sends SYN request for connection. It makes it under the System process (as I see it in TCPView). As every network apps should be configured to use proxy in our network, I'm trying to add devenv.exe to proxification rules to make its traffic goes thru LAN's proxy server. It doesn't help. So my question is how can I make that low-level-system traffic will go through local area network proxy server?

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• MS SQL to MySQL using MySQL Migration Toolkit: permission issue

  - by Zeno

  I have a MS SQL imported into SQL Server 2008 from a .bak and I set it to Mixed mode. I have a SQL user (called "test") that can correctly access the database using SQL Server. I need to convert this to a MySQL database, so I got the MySQL Migration Toolkit. I pick "MS SQL Server" and then it asks for the hostname/username/password/database. I'm not 100% sure on these, but I used "localhost" (running on same computer), left the port as is (1433) and the username/password ("test") for the SQL Server. And I used the database name for the SQL Server database I'm looking to import. I clicked next, enter my MySQL database details and then attempt to run it and I get this error: Connecting to source database and retrieve schemata names. Initializing JDBC driver ... Driver class MS SQL JDBC Driver Opening connection ... Connection jdbc:jtds:sqlserver://localhost:1433/Orders;user=test;password=blah;charset=utf-8;domain= The list of schema names could not be retrieved (error: 0). ReverseEngineeringMssql.getSchemata :Network error IOException: Connection refused: connect Details: net.sourceforge.jtds.jdbc.ConnectionJDBC2.<init>(ConnectionJDBC2.java:372) net.sourceforge.jtds.jdbc.ConnectionJDBC3.<init>(ConnectionJDBC3.java:50) net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:178) java.sql.DriverManager.getConnection(Unknown Source) java.sql.DriverManager.getConnection(Unknown Source) com.mysql.grt.modules.ReverseEngineeringGeneric.establishConnection(ReverseEngineeringGeneric.java:141) com.mysql.grt.modules.ReverseEngineeringMssql.getSchemata(ReverseEngineeringMssql.java:99) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) com.mysql.grt.Grt.callModuleFunction(Unknown Source)

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• Eliminating Duplicate Printers on Print Server 2008 R2

  - by user123247

  I added a print server role to our new 2008 R2 server and started adding printers to it that will be available to Remote Desktop sessions. When I added the Remote Desktop services role, I specified printer redirection, thinking that would be a good thing. On the PCs where I am testing all this, I added the network printers locally so that they would have the printer available for local use. When I logon to the 2008 R2 server, I notice that the printers I added are out there twice... once on the 2008 R2 server and an additional time redirected from my PC. Is there some way to eliminate this duplication w/o eliminating redirection?

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