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• Cisco QoS Guidance

  - by Kyle Brandt

  I have a 10M connection to the internet that is hooked into a 100M port. I am getting started with QoS, and am hopping for a little guidance on setting it up on a Cisco 3825 router. Right now I am going forward with the idea that I have to implement it on my router, and the provider can't provide QoS for me. How I envision it working is that the QoS will drop or queue packets on my router and that will help prevent a situation where the provider has to start dropping a lot of packets. Right now all I am tasked with is making sure that one of the 3 LANs gets a certain slice (say 3M for Gig Lan1) of the 10M internet connection (But ideally this will be more flexible in the Future). 10M Internet on 100M port on HWIC-4ESW +-----------------------+ | | Gig Lan1 | Cisco 3825 | Lan3 on HWIC-4ESW | | +-----------------------+ Gig Lan2 I need to learn more about QoS, but having a target technology and maybe example configuration will help me wrap my head around the reading I am doing a little more. Which Cisco QoS Technology do you recommend for this particular situation? Have a basic sample config of how this might work? Right now the 10M line is not congested, so this more to have something in place in case it starts to become mildly congested in the future. I do have VOIP at one location connected to this one over the Internet that goes through a VPN tunnel. Everything else that is between this location and other offices is on a separate MPLS network.

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• How to get a higher resolution on Ubuntu 11.04 using an intel chipset

  - by Saif Bechan

  I have a bit slow PC here, so I decided to put Ubuntu 11.04 on it. It use to run Windows Vista on a resolution of 1280x1024, so both my hardware and monitor support it. Now I'm on Ubuntu, but can only run 1024x768, and the screen is not that bright. Its like when you don't have the right drivers on a Windows machine. Now i'm new to linux, so I do not know what do do. I have an onboard Intel chipset i965. Maybe this is some useful information, I read something about it on a forum: lspci 00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 02) 00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express Integrated Graphics Controller (rev 02) 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01) 00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01) 00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 01) 00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01) 00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01) 00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01) 00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01) 00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) 00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01) 00:1f.2 IDE interface: Intel Corporation N10/ICH7 Family SATA IDE Controller (rev 01) 00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01) 03:03.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev c0) Can someone please tell me how I can get the screen better? saif@sodium:~$ xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.0* 800x600 60.3 56.2 848x480 60.0 640x480 59.9

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• One Comcast Business Gateway, One Router, Two Web Servers

  - by Kevin Scheidt

  I have a Comcast business account with a router and a web server (info) attached. behind the router there are multiple computers and a second web server (info) which also serves as a file server. (info) has two nics in it. One direct to comcast and one connected to the router. It needs to serve the world it's websites. It needs however, to also be able to see all the internal computers and (com)'s served files. With just 1 nic (the one connected to the router, not comcast), (info) works fine but no one outside can see it. (com) services port 80 and (info) needs to handle port 80 as well. I have two domain names registered, and 5 static ip's from comcast. right now h t t p: / /www.graceamazing.com handled by (com) works fine and h t t p: / /www.graceamazing.com:1307 handled by (info) works fine. but as soon as I enable the 2nd nic in (info) h t t p: / /www.graceamazing.info runs extremely slow (Horribly slow). however, h t t p: / /www.graceamazing.com:1307 and .com work fine. (com) has an ip address via the router 70.89.233.41 (info) has a ip addy of 70.89.233.46 via comcast (2nd nic) and a internal ip of 192.168.x.100 via static behind the router. Any suggestions or changes to make that will make h t t p: / /www.graceamazing.info perform with the same speed it has when going through h t t p: / /graceamazing.com:1307 is there a setting I should check / could have misssed?

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• Nagios command not transmitting all arguments

  - by markus

  I'm using the following service to monitor our postgres db from nagios: define service{ use test-service ; Name of servi$ host_name DEMOCGN002 service_description Postgres State check_command check_nrpe!check_pgsql!192.168.1.135!test!test!test notifications_enabled 1 } On the remote machine I've configured the command: command[check_pgsql]=/usr/lib/nagios/plugins/check_pgsql -H $ARG1$ -d $ARG2$ -l $ARG3$ -p $ARG4$ In the syslog I can see that command is executed, but there is only one argument transmitted: Oct 20 13:18:43 DEMOSRV01 nrpe[1033]: Running command: /usr/lib/nagios/plugins/check_pgsql -H 192.168.1.134 -d -l -p Oct 20 13:18:43 DEMOSRV01 nrpe[1033]: Command completed with return code 3 and output: check_pgsql: Database name is not valid - -l#012Usage:#012check_pgsql [-H <host>] [-P <port>] [-c <critical time>] [-w <warning time>]#012 [-t <timeout>] [-d <database>] [-l <logname>] [-p <password>] Oct 20 13:18:43 DEMOSRV01 nrpe[1033]: Return Code: 3, Output: check_pgsql: Database name is not valid - -l#012Usage:#012check_pgsql [-H <host>] [-P <port>] [-c <critical time>] [-w <warning time>]#012 [-t <timeout>] [-d <database>] [-l <logname>] [-p <password>] Why are arguments 2,3 and 4 missing?

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• Shared firewall or multiple client specific firewalls?

  - by Tauren

  I'm trying to determine if I can use a single firewall for my entire network, including customer servers, or if each customer should have their own firewall. I've found that many hosting companies require each client with a cluster of servers to have their own firewall. If you need a web node and a database node, you also have to get a firewall, and pay another monthly fee for it. I have colo space with several KVM virtualization servers hosting VPS services to many different customers. Each KVM host is running a software iptables firewall that only allows specific ports to be accessed on each VPS. I can control which ports any given VPS has open, allowing a web VPS to be accessed from anywhere on ports 80 and 443, but blocking a database VPS completely to the outside and only allowing a certain other VPS to access it. The configuration works well for my current needs. Note that there is not a hardware firewall protecting the virtualization hosts in place at this time. However, the KVM hosts only have port 22 open, are running nothing except KVM and SSH, and even port 22 cannot be accessed except for inside the netblock. I'm looking at possibly rethinking my network now that I have a client who needs to transition from a single VPS onto two dedicated servers (one web and one DB). A different customer already has a single dedicated server that is not behind any firewall except iptables running on the system. Should I require that each dedicated server customer have their own dedicated firewall? Or can I utilize a single network-wide firewall for multiple customer clusters? I'm familiar with iptables, and am currently thinking I'll use it for any firewalls/routers that I need. But I don't necessarily want to use up 1U of space in my rack for each firewall, nor the power consumption each firewall server will take. So I'm considering a hardware firewall. Any suggestions on what is a good approach?

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• How do I create a wifi network bridge with qemu on OS X?

  - by a paid nerd

  I grabbed a small FreeBSD live CD and QEMU, and I'm trying to bridge my Mac OS X 10.8 wifi connection so that the guest OS is available on my LAN. However, the guest OS never gets a DHCP lease. This works perfectly with VirtualBox in their "bridged" network mode, so I know it can be done. I need to get it working with QEMU because VirtualBox doesn't support the architecture that I need for this project. Here's what I've done so far based on hours of googling: Installed TUNTAP for OS X Told OS X to supposedly forward all packets, even ARP: (NOTE: This doesn't appear to work.) $ sudo sysctl -w net.inet.ip.forwarding=1 $ sudo sysctl -w net.link.ether.inet.proxyall=1 $ sudo sysctl -w net.inet.ip.fw.enable=1 Created a bridge: $ sudo ifconfig bridge0 create $ sudo ifconfig bridge0 addm en0 addm tap0 $ sudo ifconfig bridge0 up $ ifconfig bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether ac:de:xx:xx:xx:xx Configuration: priority 0 hellotime 0 fwddelay 0 maxage 0 ipfilter disabled flags 0x2 member: en0 flags=3<LEARNING,DISCOVER> port 4 priority 0 path cost 0 member: tap0 flags=3<LEARNING,DISCOVER> port 8 priority 0 path cost 0 tap0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether ca:3d:xx:xx:xx:xx open (pid 88244) Started tcpdump with -I in the hopes that it enables promiscuous mode on the wifi device: $ sudo tcpdump -In -i en0 Run QEMU using the bridged network instructions: $ qemu-system-x86_64 -cdrom mfsbsd-9.2-RELEASE-amd64.iso -m 1024 \ -boot d -net nic -net tap,ifname=tap0,script=no,downscript=no But the guest system never gets a DHCP lease: If I tcpdump -ni tap0, I see lots of traffic from the wireless network. But if I tcpdump -ni en0, I don't see any DHCP traffic from the QEMU guest OS. Any ideas? Update 1: I tried sudo defaults write "/Library/Preferences/SystemConfiguration/com.apple.Boot" "Kernel Flags" "net.inet.ip.scopedroute=0" and rebooting per this mailing list suggestion, but this didn't help. In fact, it made VirtualBox bridged mode stop working.

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• How to connect to Oracle DB via ODBC

  - by Mat

  I am attempting to connect to a remote Oracle DB via ODBC. I am totally inexperienced and fail to connect. What I have installed: Oracle 'ODBC Driver for RDB' A program I want to connect from (Altova Mapforce, an ETL) What I do: Under Administrative tools I open the Windows "ODBC Data Source Administrator I click 'Add..' and select the Oracle ODBC Driver The Window 'Oracle RDB Driver Setup' opens. I fill in: Data source name: free choice Description: I leave blank Transport: I choose TCP/IP Server: I input the IP address of the server Service: I leave 'generic' UserID: I enter the user name (that belongs to the password I have) Attach Statement: no idea what do do here?? Upon choosing 'OK', the 'Oracle RDB ODBC Driver Connect' opens and I am prompted the password. I enter the password and the connection fails. Questions Do I need further programs on my computer, e.g. the Oracle client of Instant client? I am never prompted the port of the server - isn't this relevant? I am never prompted SID - isn't this relevant? I connected from SQL developer easily - it prompted only server IP, port, username, password and SID.

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• DL380 G7: Not able to access ILO on DL380 via ssh from a client

  - by user117140

  I have problem where I can't access my ILO(ssh to ILO IP) thru client which is in different network.I am able to ping ILO IP thru this clinet but ssh access is not possible. Is it possible to have ssh to ILO IP from a client which is in different network? FYI, from the same client I can do ssh to server application IP but ssh to this server ILO IP is not possible. Kindly help? Some more info added: ILO IP address is 10.247.172.70 and its VLAN is different than Client VLAN. Client IP address is 10.247.167.80. ping to ILO IP from this client is possible but not ssh. I can do ssh to ILO IP if I try to do it from the server(hostname:node1) having ILO port or from the other node of this cluster itself,So ssh login is enabled. [root@node1 ~]$ssh -v 10.247.173.70 OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to 10.247.173.70 [10.247.173.70] port 22. [root@node1 ~]$ping 10.247.173.70 PING 10.247.173.70 (10.247.173.70) 56(84) bytes of data. 64 bytes from 10.247.173.70: icmp_seq=1 ttl=254 time=0.283 ms 64 bytes from 10.247.173.70: icmp_seq=2 ttl=254 time=0.344 ms 64 bytes from 10.247.173.70: icmp_seq=3 ttl=254 time=0.324 ms 64 bytes from 10.247.173.70: icmp_seq=4 ttl=254 time=0.367 ms

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• Filezilla client unable to get directory listing from Filezilla Server (Windows)

  - by sestocker

  I've set up a self signed certificate in FileZilla server and enabled FTP over SSL/TPS. When I connect from the client FileZilla, I am able to authenticate but cannot get a directory listing: Status: Connecting to MY_SERVER_IP:21... Status: Connection established, waiting for welcome message... Response: 220-FileZilla Server version 0.9.39 beta Response: 220-written by Tim Kosse ([email protected]) Response: 220 Please visit http://sourceforge.net/projects/filezilla/ Command: AUTH TLS Response: 234 Using authentication type TLS Status: Initializing TLS... Status: Verifying certificate... Command: USER MYUSER Status: TLS/SSL connection established. Response: 331 Password required for MYUSER Command: PASS ******** Response: 230 Logged on Command: PBSZ 0 Response: 200 PBSZ=0 Command: PROT P Response: 200 Protection level set to P Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/" is current directory. Command: TYPE I Response: 200 Type set to I Command: PORT 10,10,25,85,219,172 Response: 200 Port command successful Command: MLSD Response: 150 Opening data channel for directory list. Response: 425 Can't open data connection. Error: Failed to retrieve directory listing I have ports 21 and 50001 through 50005 open on the firewall. We are migrating servers - the 50001 - 50005 is one of the things that helped get FTPS working on the old server. I'm not sure this installation would use the same ports? What else could be the problem?

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• VMWare Host Not Responding - VMs are Disconnected (ESXi 3.5)

  - by EyeonTech

  I have inherited a VMWare environement ESX v3i 3.5. I am not fluent with VMWare ESXi so bare with me. Two days ago, when I opened Virtual Centre, one of the Hosts showed up as Not Responding. The error I am seeing is:----- Unable to acquire licenses because license source is unavailable: The license manager has not been started yet, the wrong port@host or license file is being used, or the port or hostname in the license file has been changed. What I have tried: I have Stopped and Started the license server within the application. When I do this, I am able to disconnect the host in Virtual Centre and reconnect. This brings the host back online, but a few minutes later, the host goes to a not responding state again. I have rebooted the server with the Licensing software installed. While browsing Google, I have not been able to find any steps I feel comfortable performing and I would like the opinion of the VMWare pros. Where are the log files I should be looking at to correctly determine what is going on? Has anyone seen this behaviour and how did you resolve it? Thank you

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• Mac OS X - configuring ntpd server with on LAN with D-Link DIR-655

  - by Mark C

  Hey all, This question is pretty specific, but I hope someone will have seen this error elsewhere. I a configuring a machine running OS X 10.5.8 to be an NTP server for machines connected to a LAN that is not connected to the Internet. I am not too worried about knowing the "right" time on all the machines, but rather worried about making sure everyone has the same notion of time. I configured the NTP daemon on Mac by turning on the Set date and time automatically in System Preferences, using the server's clock, 127.127.1.0 as the reference clock. I figured I should see if the server can NTP query itself before proceeding to the clients. The weird part is when I run the ntpq -p command in a command-prompt when connected to my D-Link DIR-655 (firmware: 1.33), it hangs for about a minute or so each time before finally giving me some output. I thought the problem might have to do with Port Forwarding, so I configured the router to forward port 123 for the IP of the server, but that did not improve the situation. When I run the ntpq -p command on my school's network, on a Linksys WRT54G router, or with the wireless Airport card turned off - I have absolutely no problems - the command returns a response instantly. Is this normal? I can see why a query might take a minute or so, but I don't understand why one router does it faster than the other. I tried messing around with the ntp.conf file adding the burst, minpoll, and maxpoll options: server 127.127.1.0 burst minpoll 4 maxpoll 5 Figuring that perhaps I am polling too often and the configuration file is slowing me down, but even with this, the ntpq still hangs on the D-Link DIR-655, but does just fine on the other routers. Any thoughts on where the lag is coming from or if the lag is even a problem?

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• Apache2.2 not responding on Windows 7 desktop

  - by Adam

  Afternoon! I'm having some trouble with Apache2.2 on Windows 7. For over a year it's been running no problem, but all of a sudden requests have just stopped responding. They don't ever time out, the browser just keeps on waiting for a response, which makes me think it's something blocking communication with Apache. Interestingly though, if I stop Apache the requests fail immediately. The Apache service is running, and using netstat I can see it listening on port 80 as configured: TCP 127.0.0.1:80 0.0.0.0:0 LISTENING If I stop the Apache service, that line disappears. I have an entry within my hosts file for each VHost I'm trying, all pointing to 127.0.0.1. Each VHost is configured to *:80. Nothing however is getting recorded in the access or error (at debug level) log files. I've verified the file paths are correct, even though they were never changed. Neither is anything getting recorded within Windows' Event Log. The problem showed up when I added a new VHost and restarted, however I hadn't been using it for a couple of days prior so I don't believe it's the config change. I have performed a syntax check to be sure, and when starting from the command prompt no errors are reported there. I do have Windows Firewall running, however I've verified the Apache rule is correct and tried turning it off to ensure that wasn't the problem. I've reinstalled Apache, in the hope it might magically fix something using the default config, but still no joy. I've also tried using a different port. I'm completely lost for ideas now. Can anybody help? Cheers Adam

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• Connecting a network printer via a Thecus N2100 - works in Vista, not in Windows 7

  - by Jon Skeet

  I have a Lexmark E250d printer attached to a Thecus N2100 NAS. On Windows Vista I've managed to configure this using an "Internet" printer port with the URL of http://thecus:631/printers/usb-printer. I can add a printer in a similar way in Windows 7, but it never manages to print the test page. If I go to "Configure Port" in Vista, it just has "Security Options" - on Windows 7 it's asking about Raw mode vs LPR mode etc. On Vista I'm using an E250d-specific driver from Lexmark; on Windows 7 there's a Microsoft E250d driver, or a Universal PCL XL driver from Lexmark... I wouldn't expect this different to be related to the problem, but I thought I'd mention it anyway. (Lexmark doesn't have a Windows 7 E250d-specific driver as far as I can see.) Any suggestions? I was thinking of upgrading my main laptop from Vista to Windows 7, but I'd really like to get this sorted first... EDIT: If I connect to http://thecus:631/printers/usb-printer via Chrome while capturing with Wireshark, I get this response: HTTP/1.1 200 OK Date: Wed, 06 Jan 2010 16:47:23 GMT Connection: Keep-Alive Keep-Alive: timeout=60 Content-Language: C Transfer-Encoding: chunked Content-Type: text/html;charset=iso-8859-1 0 No idea what that's meant to be doing... EDIT: On further consultation, this would appear to be the Internet Printing Protocol which is layered on HTTP. Printing a test page successfully from Vista posts to that URL. Will attempt the same on Windows 7...

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• Is it possible to provide a wired ethernet connection to external devices with an extra LAN card?

  - by Ben McCormack

  I'm trying to provide a wired ethernet connection (wireless is not an option for this device) to a device (Samsung blu-ray player) without running Cat5 cable all over the home. I have a PC sitting next to this device and the PC is connected to the network via a wireless USB adapter. Is it possible to provide a wired connection from the PC to the wired device using the (currently unused) ethernet port in the back of the computer? Here's how I envision the device getting connected to the internet via my network: Linksys WRT54G v8 Wireless Router | ``--> Windows 7 PC connected via wireless | ``--> Blu-ray player connected via wired connection to the ethernet port on the PC. If so, how is this done? Will I need a crossover cable? What settings will I need to change in Windows 7 so that the device can connect? NOTE: I'm trying to avoid having to buy a wireless bridge and/or hacking a router with an open-source firmware to get this to work. See my previous question for more details.

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• Test server on a local network with XAMPP

  - by hopscotch1978

  Hi, I'm not very proficient with networks and could use some help. I've got a Win 7 desktop with XAMPP which acts as my local dev machine. I've configured a virtual host on the desktop which I'm able to access fine. If I'm understanding things correctly, the virtual host uses port 80 (<VirtualHost 127.0.0.1:80>). I've just tried to configure a separate Win XP laptop on the local wireless network to connect to the main desktop for testing purposes. I've added the IP address and virtual host name to my Hosts file on the laptop. My virtual host is imaginatively named "virtualhost1". When I type this into my laptop browser, it connects correctly to the main desktop and I get the XAMPP welcome screen. But I can't seem to get to the actual site, just the XAMPP welcome screen. It kind of jumps the browser to http://virtualhost1/xampp/. I think it's a port issue of some sort but I have no idea how to resolve it. I would get the same XAMPP welcome screen on my desktop if I omitted ":80" from the virtual host declaration. On my main desktop, typing "virtualhost1" to the browser address bar gives me the site correctly, not the XAMPP welcome screen. Help would be appreciated. Thank you.

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• Migrating to CF9: trouble getting JRun working with SSL

  - by DaveBurns

  I have a client on MX7 who wants to migrate to CF9. I have a dev environment for them on my WinXP machine where I've configured MX7 to run with JRun's built-in web server. I've had that working for a long time with both regular and SSL connections. I installed CF9 yesterday side-by-side with the existing MX7 install to start testing. The install was smooth and detected MX7, adjusted CF9's port numbers for no conflict, etc. Testing started well: MX7 over regular and SSL still worked and CF9 worked over regular HTTP. But I can't get CF9 to work with SSL. I installed a new certificate with keytool, FireFox (v3.6) complained about it being unsigned, I added it to the exception list, and now I get this: Secure Connection Failed An error occurred during a connection to localhost:9101. Peer reports it experienced an internal error. (Error code: ssl_error_internal_error_alert) I've been Googling that in all variations but can't find much help to get past this. I don't see any info in any log files either. FWIW, here's my SSL config from SERVER-INF/jrun.xml: <service class="jrun.servlet.http.SSLService" name="SSLService"> <attribute name="enabled">true</attribute>` <attribute name="interface">*</attribute> <attribute name="port">9101</attribute> <attribute name="keyStore">{jrun.rootdir}/lib/mykey</attribute> <attribute name="keyStorePassword">*deleted*</attribute> <attribute name="trustStore">{jrun.rootdir}/lib/trustStore</attribute> <attribute name="socketFactoryName">jrun.servlet.http.JRunSSLServerSocketFactory</attribute> <attribute name="deactivated">false</attribute> <attribute name="bindAddress">*</attribute> <attribute name="clientAuth">false</attribute> </service> Anyone here know of any issues re setting up SSL and CF9? Anyone had success with it? Dave

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• How can I write automated tests for iptables?

  - by Phil Frost

  I am configuring a Linux router with iptables. I want to write acceptance tests for the configuration that assert things like: traffic from some guy on the internet is not forwarded, and TCP to port 80 on the webserver in the DMZ from hosts on the corporate LAN is forwarded. An ancient FAQ alludes to a iptables -C option which allows one to ask something like, "given a packet from X, to Y, on port Z, would it be accepted or dropped?" Although the FAQ suggests it works like this, for iptables (but maybe not ipchains as it uses in the examples) the -C option seems to not simulate a test packet running through all the rules, but rather checks for the existence for an exactly matching rule. This has little value as a test. I want to assert that the rules have the desired effect, not just that they exist. I've considered creating yet more test VMs and a virtual network, then probing with tools like nmap for effects. However, I'm avoiding this solution due to the complexity of creating all those additional virtual machines, which is really quite a heavy way to generate some test traffic. It would also be nice to have an automated testing methodology which can also work on a real server in production. How else might I solve this problem? Is there some mechanism I might use to generate or simulate arbitrary traffic, then know if it was (or would be) dropped or accepted by iptables?

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• placing shell script under systemd control

  - by Calvin Cheng

  Assuming I have a shell script like this:- #!/bin/sh # cherrypy_server.sh PROCESSES=10 THREADS=1 # threads per process BASE_PORT=3035 # the first port used # you need to make the PIDFILE dir and insure it has the right permissions PIDFILE="/var/run/cherrypy/myproject.pid" WORKDIR=`dirname "$0"` cd "$WORKDIR" cp_start_proc() { N=$1 P=$(( $BASE_PORT + $N - 1 )) ./manage.py runcpserver daemonize=1 port=$P pidfile="$PIDFILE-$N" threads=$THREADS request_queue_size=0 verbose=0 } cp_start() { for N in `seq 1 $PROCESSES`; do cp_start_proc $N done } cp_stop_proc() { N=$1 #[ -f "$PIDFILE-$N" ] && kill `cat "$PIDFILE-$N"` [ -f "$PIDFILE-$N" ] && ./manage.py runcpserver pidfile="$PIDFILE-$N" stop rm -f "$PIDFILE-$N" } cp_stop() { for N in `seq 1 $PROCESSES`; do cp_stop_proc $N done } cp_restart_proc() { N=$1 cp_stop_proc $N #sleep 1 cp_start_proc $N } cp_restart() { for N in `seq 1 $PROCESSES`; do cp_restart_proc $N done } case "$1" in "start") cp_start ;; "stop") cp_stop ;; "restart") cp_restart ;; *) "$@" ;; esac From the bash script, we can essentially do 3 things: start the cherrypy server by calling ./cherrypy_server.sh start stop the cherrypy server by calling ./cherrypy_server.sh stop restart the cherrypy server by calling ./cherrypy_server.sh restart How would I place this shell script under systemd's control as a cherrypy.service file (with the obvious goal of having systemd start up the cherrypy server when a machine has been rebooted)? Reference systemd service file example here - https://wiki.archlinux.org/index.php/Systemd#Using_service_file

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• simple apache2 reverse proxy setup not working

  - by Nick

  I know what proxy is (very high level), it's just I have never set up one, and it feels like I might be missing some big fat point here. My setup: client server (static IP), runs apache on port 80 proxy (has 2 network cards, one is on the clients network, the other one with a static IP on the server network), runs apache on port 80 I am trying to configure these three machines so that when client requests: http://proxy/machine1 It gets served server's pages at server root URL, i.e. http://server/ I can access client pages just fine. However, when I try accessing a page from the client machine, it simply gets redirected to server's IP address, which it clearly can't access since they are not on the same network: ... <meta http-equiv="REFRESH" content="0;url=http://server/machine1"></meta> <title>Redirect</title> ... My apache2 config is: LoadModule proxy_module /modules/mod_proxy.so LoadModule proxy_http_module /modules/mod_proxy_http.so ProxyRequests off <Proxy *> Order Allow,Deny Allow from all </Proxy> ProxyPass /machine1 http://server:80 <Location /machine1> ProxyPassReverse / </Location> What gives? Thanks!

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• Can't log in using second domain controller when first DC is unreachable

  - by rbeier

  Hi, We're a small web development company. Our domain has two DCs: a main one (BEEHIVE, 192.168.3.20) in the datacenter and a second one (SPHERE2, 10.0.66.19) in the office. The office is connected to the datacenter via a VPN. We recently had a brief network outage in the office. During this outage, we weren't able to access the domain from our office machines. I had hoped that they would fail over to the DC in the office, but that didn't happen. So I'm trying to figure out why. I'm not an expert on Active Directory so maybe I'm missing something obvious. Both domain controllers are running a DNS server. Each office workstation is configured to use the datacenter DC as its primary DNS server, and the office DC as its secondary: DNS Servers . . . . . . . . . . . : 192.168.3.20 10.0.66.19 Both DNS servers are working, and both domain controllers are working (at least, I can connect to them both using AD Users + Computers). Here are the SRV records that point to the domain controllers (I've changed the domain name but I've left the rest alone): C:\nslookup Default Server: beehive.ourcorp.com Address: 192.168.3.20 set type=srv _ldap._tcp.ourcorp.com Server: beehive.ourcorp.com Address: 192.168.3.20 _ldap._tcp.ourcorp.com SRV service location: priority = 0 weight = 100 port = 389 svr hostname = beehive.ourcorp.com _ldap._tcp.ourcorp.com SRV service location: priority = 0 weight = 100 port = 389 svr hostname = sphere2.ourcorp.com beehive.ourcorp.com internet address = 192.168.3.20 sphere2.ourcorp.com internet address = 10.0.66.19 Does anyone have any ideas? Thanks, Richard

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• Mysql master-master not replicating

  - by frankil

  I'm setting up a master-master mysql replication on two servers (db1 and db2). I started with setting up db2 as a slave to db1 and that works fine. But when I set up db1 as a slave to db2 it isn't replicating. On the face of it everything looks fine but the data isn't replicating. There are no errors in either of the error logs. The slave status is updating the bin log position. I have used mysqlbinlog to examine both the binlog on the db2 and the relay log on db1 and all of the queries are going in there, but not being executed to db1. "show slave status" on both servers shows that both the slave io and sql threads are "Yes" and that the relay log position is updated by the sql thread. Also on both servers: >echo "show processlist" | mysql | grep "system user" 166819 system user NULL Connect 3655 Waiting for master to send event NULL 166820 system user NULL Connect 3507 Has read all relay log; waiting for the slave I/O thread to update it NULL Relevant config for db1: server-id = 1 log-slave-updates replicate-same-server-id = 0 auto_increment_increment = 4 auto_increment_offset = 1 master-host = db2 master-port = 3306 master-user = slaveuser master-password = *** skip-slave-start sync_binlog = 1 binlog-ignore-db=mysql Config for db2 server-id = 2 log-slave-updates replicate-same-server-id = 0 auto_increment_increment = 4 auto_increment_offset = 2 master-host = db1 master-port = 3306 master-user = slaveuser master-password = *** sync_binlog = 1 relay-log=mysql-relay-bin binlog-ignore-db=mysql What else can I look for to make sure db1 executes the queries from db2?

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• How do I use a Minitel terminal as a linux dumb terminal

  - by Pawz

  I recently purchased a US version of the Alcatel Minitel terminal. I think it's a 1B version. Pictures of it here: I tried connecting a null modem to the 25 pin port on the back and plugging it into a linux box running agetty but I couldn't get it to show any signs of being connected. I used Google Translate to translate this document into English: http://mirabellug.org/wikini/upload/Documentations_minitel.pdf As far as I can tell, you take it out of videotex mode by typing Fcnt-T A, then turn off local echo with Fcnt-T E, then set it to 4800 baud with Fcnt-P 4. I presume Fcnt refers to the "CTRL" key on my terminal. But I think I'm doing something wrong, because it doesn't look like it's recognising the keystrokes, because "Fcnt-T A" just prints the letter A to the screen, which is not what you'd expect a function key combo to do. Has anyone used these minitel terminals as a linux terminal, and if so, please can you share how to configure the minitel to run as a terminal ? Is the 25 pin plug even the correct port to use ? I read something online that indicated you're supposed to use the 5 pin DIN plug instead, is that right ? If so, what's the 25 pin plug for ? If I am supposed to use the DIN plug, does anyone know the pinouts so I can make a cable ?

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• ServerName wildcards in Apache name-based virtual hosts?

  - by Martijn Heemels

  On our LAN I've set up several 'fake' TLDs in the DNS server, with the intention of using them for Apache name-based virtual hosting. I'd like to combine this with mass-virtual-hosting (i.e. VirtualDocumentRoot) on an Ubuntu 10.04 LAMP server. However, I can't get it to select the right vhost! Here is a summary of the Apache config: NameVirtualHost 10.10.0.205 <VirtualHost 10.10.0.205> ServerName *.test VirtualDocumentRoot /var/www/%-3.0.%-2/test/%1/ CustomLog /var/log/apache2/access.log vhost_combined </VirtualHost> <VirtualHost 10.10.0.205> ServerName *.dev VirtualDocumentRoot /var/www/%-3.0.%-2/dev/%1/ CustomLog /var/log/apache2/access.log vhost_combined </VirtualHost> A hostname such as www.domain.com.dev, correctly resolves to 10.10.0.205, but always selects the top vhost, instead of the bottom one, which matches more closely. I was under the impression that Apache would first try to match the ServerName before defaulting to the top vhost for a given IP. What am I doing wrong? Or is this not possible and must I use another IP for each TLD? apachectl -S outputs (trimmed): 10.10.0.205:* is a NameVirtualHost default server *.test port * namevhost *.test port * namevhost *.dev

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• publickey authentication only works with existing ssh session

  - by aaron

  publickey authentication only works for me if I've already got one ssh session open. I am trying to log into a host running Ubuntu 10.10 desktop with publickey authentication, and it fails when I first log in: [me@my-laptop:~]$ ssh -vv host ... debug1: Next authentication method: publickey debug1: Offering public key: /Users/me/.ssh/id_rsa ... debug2: we did not send a packet, disable method debug1: Next authentication method: password me@hosts's password: And the /var/log/auth.log output: Jan 16 09:57:11 host sshd[1957]: reverse mapping checking getaddrinfo for cpe-70-114-155-20.austin.res.rr.com [70.114.155.20] failed - POSSIBLE BREAK-IN ATTEMPT! Jan 16 09:57:13 host sshd[1957]: pam_sm_authenticate: Called Jan 16 09:57:13 host sshd[1957]: pam_sm_authenticate: username = [astacy] Jan 16 09:57:13 host sshd[1959]: Passphrase file wrapped Jan 16 09:57:15 host sshd[1959]: Error attempting to add filename encryption key to user session keyring; rc = [1] Jan 16 09:57:15 host sshd[1957]: Accepted password for astacy from 70.114.155.20 port 42481 ssh2 Jan 16 09:57:15 host sshd[1957]: pam_unix(sshd:session): session opened for user astacy by (uid=0) Jan 16 09:57:20 host sudo: astacy : TTY=pts/0 ; PWD=/home/astacy ; USER=root ; COMMAND=/usr/bin/tail -f /var/log/auth.log The strange thing is that once I've got this first login session, I run the exact same ssh command, and publickey authentication works: [me@my-laptop:~]$ ssh -vv host ... debug1: Server accepts key: pkalg ssh-rsa blen 277 ... [me@host:~]$ And the /var/log/auth.log output is: Jan 16 09:59:11 host sshd[2061]: reverse mapping checking getaddrinfo for cpe-70-114-155-20.austin.res.rr.com [70.114.155.20] failed - POSSIBLE BREAK-IN ATTEMPT! Jan 16 09:59:11 host sshd[2061]: Accepted publickey for astacy from 70.114.155.20 port 39982 ssh2 Jan 16 09:59:11 host sshd[2061]: pam_unix(sshd:session): session opened for user astacy by (uid=0) What do I need to do to make publickey authentication work on the first login? NOTE: When I installed Ubuntu 10.10, I checked the 'encrypt home folder' option. I'm wondering if this has something to do with the log message "Error attempting to add filename encryption key to user session keyring"

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• Rsync Push files from linux to windoes. ssh issue - connection refused

  - by piyush c

  For some reason I want to run a script to move files from Linux machine to Windows. I have installed cwRsync on my windows machine and able to connect to linux machine. When i execute following command: rsync -e "ssh -l "piyush"" -Wgovz --timeout 120 --delay-updates --remove-sent-files /usr/local/src/piyush/sync/* "[email protected]:/cygdrive/d/temp" Where 10.0.0.60 is my widows machine and I am running above command on Linux - CentOS 5.5. After running command I get following error message: ssh: connect to host 10.0.0.60 port 22: Connection refused rsync: connection unexpectedly closed (0 bytes received so far) [sender] rsync error: error in rsync protocol data stream (code 12) at io.c(463) [sender=2.6.8] [root@localhost sync]# ssh [email protected] ssh: connect to host 10.0.0.60 port 22: Connection refused I have modified my firewall settings on widows to allow all ports. I think this issue is due to SSH Daemon not present on my windows machine. So I tried installing OpenSSH on my machine and running ssh-agent but didn't helped. I tried similar command to run on my widows machine to pull files from Linux and its working fine. For some reason I want command for Linux machine so that I can embed it in a shell script. Can you suggest me if I am missing anything.

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