Ubuntu Networking :: Simple Dual Wan - Redundancy ONLY - Services Will Only Respond On One Interface At A Time - Not Both
Dec 22, 2010
I recently added a second interface to my Ubuntu 9.10 server, I now have a dsl AND Cable connection for it, Im not trying to load balance or anything sophisitcated, heres my problem.
The machines networked, I put static entries in my dhcp servers and both interfaces are up and live with dhcp, and Ive tried with dhcp and static, same problem occurs.
But my problem is that services will only respond on one interface at a time, not both.
Anyone know what the heck is going on here?
Kernel IP routing table
Should I make them static and remove both gateways?
eth0 is connecting via a Cisco switch to the outer world and eth1 and eth2 to internal networks.
eth1 and eth2 are working without problems all the time, however I have the following incident with eth0: although it is RUNNING, and after it works for some time (like some hours), it then becomes incapable of sending/receiving traffic. Here are more details, after the interface exits the RUNNING state:
I am wondering whether there this is because there is not traffic for some time and so the interface goes to idle. Is there any parameter I can tweak in RHEL6 to force the interface to remain RUNNING even in the absence of traffic (although I would be expecting that some 802.1 packets would be periodically flowing from the switch to the interface)?
Im new to this Cent OS as well as Unix based Operating Systems. Please help me with the below requirement.My Company is a Serach based data collector from different websites like Google, Yahoo & many more..Collecting the data from the search engines is a issue for right now.. As many search engines are blocking us to search and retrive the date after some time.. Taking Google as example : Google Blocks my IP after every 30 mins of retriving.. Application is a Windows based & using Windows 2003 as the Server.. Would like to give a Dynamic IP to the Windows Server via 1st Ethernet Card & enable the 2nd Ethernet for the Internet..Eg : eth 0 = 192.168.1.1eth 1 = x.x.x.x (Public IP)I have check with few of my friends who told me to get Linux or Cent OS installed to do a interface disable after given time & enable a secondary device or virtual interface the next couple of seconds... Like eg : eth 1 = x.x.x.1 eth 2 = x.x.x.2 eth 3 = x.x.x.3 so on.. Would like the eth 1 to be down after 60 mins & eth 2 o be up & again after 60 mins of up time eth 2 down & eth 3 up.
I am looking for a distro with an extremely simple desktop interface. I am looking for something as simple as the iPad where you can only run 1 application and it gets maximized. You click an icon and... you get that. Also the hardware is well described as "Aging," it is not dual-core, and may be as low as 64mb of RAM.
This is because the computer will basically be used as a simple game machine, and by game I mean Minesweeper and Solitaire. For Multiplayer games maybe virtual board games on a single screen, no LAN type stuff. Also I do not want the primary users of this computer to be able to access anything besides exactly what I determine they are supposed to. Basically what we want is something that is Child-Safe and Child-Simple. There will be no internet browsing or document creation or anything complicated.
Now I am not saying however that there won't be a possible user login that does have access to a full complement of software programs, just that I need to be able to setup at least one login that meets the criteria I specified. I have used Ubuntu in a few iterations, I can use a terminal with some internet help, and consider myself "Technical." Primarily I will be managing the software.
I have been using Trixbox CE for a couple of years and a client has asked me to setup a VOIP system with two phones and a couple of extensions. When he gets hit with a borage of phone calls I need to have the call that are behind the others to go the the next extension. I need redundancy if one Internet connection goes down and have the another kick in or failover. How does one configure Trixbox to failover to the other Internet connection and can someone give me a list of carriers in the Washington D.C area. Can someone point me in the right direction?
There are many time zone files accessible from the command line that don'thow up in the GUI ("system-config-time"). How do I add these time zones to the GUI
I wanted to know how can I set a period of time to a tcp connection to wait for request or respond for tcp block read. which system call or function I can use? Does any body know a very simple quick and easy reference on web for socket programing that has lots of socket programing examples in it?
I have several servers that we have bonded some NICs for rundancy and they will of course switch from primary to secondary NIC if connection state is lost to the switches they are physically connected to, but is there any way to be able to sense upstream connectivity (off switch) for each NIC and failover even though the NIC itself has a connection state to the switch it is plugged into? We are using Dell managed switches on VLANs with trunking.
What is the correct way to stop upstart services from staring at boot time ? I'm doing something like this example in /etc/init/mysql.conf:
Code: #start on (net-device-up # and local-filesystems # and runlevel [2345]) start on runlevel [!0123456] # I ADDED THIS LINE (and commented the above ones) stop on runlevel [016]
1. Is this the correct way ?
2. Is there no way of doing something like we do with update-rc.d -f apache2 remove ?
3. When will ubuntu ship a gui to add or remove services from boot ?
I have installed nagios in a CentOS vm and now its monitoring the local host, one remote host which is also a vm with CentOS 5.3 and one windows xp system. Is there any option for me to change the threshold time for the services given? For e.g. I had a service of current_load which comes as a default plugin while installing nagios itself. What should I do to change the threshold value of the current_load so that I might get the warning or error alert some time earlier as it was now.
I need to start an application (graphical) when the PC start, even before anybody login, and use/launch a specific user. Now only can do this manually; when gdm starts, switch to any text tty [ie. Ctrl + Alt + F1], then I login into the special user, start a X server, export the DISPLAY environment variable, and start the application.
With this steps: Code: $X :1 -verbose -nr -nolisten tcp & # Maybe Metacity -> $ metacity $export DISPLAY=:1 $JavaApp & Now i need put this steps (script) in some place to launch the app automatically, and with and specific user [ie. manager].
How can I made it? Maybe in init.d? or an special xinitrc? And how can start the app with the specific user? And, if is possible, who can stop the app when the system going turn off? I have Debian 5.0 and a beginner knowledge of shell script.
I been struggling with this since Karmic and I know others have as well. This is really the only thing making me keep a Windows install around for my personal stuff.
Problem: Convert .TS files to iPod or really any smaller format keeping A/V sync after edit. I can covert my .TS file perfectly if I do not edit it but I want to just do a simple, quick trim of 2 mins from beginning and end.
HandBrake with convert the file perfectly but cannot trim. Avidemux does a great job on the video but I always have to play with the audio shift to get it in sync. It is usually betwenn -250ms to -1000ms off but I cannot count on it. If I run the video through DGIndex in Wine or view it with Mediainfo both programs detect the an offset problem but they are always wrong by almost 500ms and it is never constant.
Regular video editing I have pretty good luck with my normal DV files and I could even run the .TS files through other programs but it is too time consuming to be useful form this simple task. Anytime I want to take my recorded TV .TS files I cannot edit them quickly without making a full project out of it in Openshot Cinelerra, etc.
Has anyone found a quick, reliable way to do some lite video trimming in Ubuntu and keep A/V sync without having to resort to any Windows programs?
EDIT: Also I really do not want to resort to have to demux separately either. I know I am asking a lot but I got spoiled with a couple of Windows programs that will edit without reencode programs like VideoReDo can do the editing and converting all at once (for $100 !).
I'm trying to find a way to auto-mount a couple of NTFS volumes at login (or even earlier if possible), not by editingfstab or running the (currently buggy for Maverick) ntfs-config tool, but by simulating the way that Nautilus mounts volumes when you click or double click on one. The reasons for this are not important(just to make things a little mysterious).So, I checked the output of syslog when I click on an unmounted volume in Nautilus. It seems very useful, but I can't make much out of it. So I need your help I need to make something like a script to do this thing at startup.
Code: Feb 16 20:52:28 UBUNTU-BCM-P5Q-DELUXE ntfs-3g[3701]: Version 2010.8.8 external FUSE 28 Feb 16 20:52:28 UBUNTU-BCM-P5Q-DELUXE ntfs-3g[3701]: Mounted /dev/sdb1 (Read-Write, label
I'm having an issue with dual networking on RHEL 5. My initial question is can the order the ethx (0,1) devices are brought up be changed at boot time, so I could bring up eth1 before eth0?
Some background: eth0 is DHCP'd and using DNS, basically this is my primary network. eth1 is an isolated subnet, with a manually configured IP which has no connection to eth0 or the outside world. When I bring up networking it first brings up eth0 and then eth1, what happens is eth1 becomes the 'primary' network of the host and I lose my connection to DNS/NFS/NIS and the outside world.
If I login and manually bring up eth1 first, then eth0 everyone is happy and connections work. So, I'm looking for a solution to either bring up eth1 before eth0 or somehow make eth0 my primary IP and not have it be clobbered by eth1.
I just had an ATT Uverse RG installed. However my Smoothwall router that previously worked fine with the ADSL SpeedStream is no longer accepting an address assignment DHCP ip address from this new gateway. (3800HGV-B)Any thoughts ideas or experience working with this hardware? ATT only supports Windows and Mac
I have installed ubuntu server 10.04 amd64. The problem is every time I login, there is no internet connection and I have to manually run "sudo ifconfig eth3 up". (eth3 has the cable). What should I do to automate that?
I am trying to get a server to boot off the lan (pxe). I added a tftp server and tested it as operating successfully. I just plugged the pxe-server in and see the dhcp request/response as expected. The pxe-server then sends out an arp to the same address as the dhcp exchange, but the server never responds.
1. as the pxe-server already has info on the mac/ip-addr, why is it now sending another arp
2. why doesn't the server respond? I have most of my network setup the same way and the dhcp exchange is fine.
3. I'm guessing that the arp is triggered by the bootp exchange (next-server).
I do not have the server in the host table under that address.
I wanted to install Samba for file-sharing purposes on my home network, so I went ahead and installed the latest stable Samba release, but it doesn't respond to commands in terminal (i.e. sudo samba start, sudo samba stop, sudo samba restart, sudo samba /etc/init.d/samba restart...). My shared files are now viewable on other computers but completely unusable for file storage. Samba DID respond when I was using Samba4, but when I used Samba 4 I got this:
So I either get a Samba that doesn't work at all (the current version), or a Samba that pretends to work but ignores all of my parameters, claiming that it doesn't recognize any of them. I searched through synaptic package manager to make sure I have every single code or management file that could possibly be helpful for using Samba.
how graphs can be plotted on a web interface on real time ? I have a web interface coded in PHP mostly and for graphs I have jpgraphs. But the job needs the graphs to be real time not static. As of now there's a server side program that writes onto a csv file. I read data from the file and plot it using jpgraph when the page loads. Is there anyway I can code real-time dynamic graphs on a web interface ?
I bought a brand new PC with 2 hard disk: a solid state 250gb and a 500gb sata drive. On the first one, I installed Ubuntu LTS 10.04.2. My question is: how can I make the redundancy of the boot partition and / on the sata disk? I thought to clone the internal hard disk and then run a rsync before every shutdown. But the PC doesn't always boot from the ssd and change the boot sequence from the bios has no effect. I had also considered the idea of a raid 1 with mdadm, but it seems to worsen the performance.
I have a server with centos 5 and plesk 9 and I have buy an additional IP address for my server, when i create it in plesk, there is no problem, all its ok I can assign it to a new domain, but the ip only responds ping, none of other services as http, ssh or smtp.I paste here the configuration of files
I have set 'ONBOOT=no' in interface script '/etc/sysconfig/network-scripts/ifcfg-eth0:2' but my interface bring up at boot time, what is the problem , I have checked it 3 or 4 diff os/machine but the same issue. Can anyone please help me to disable virtual IP's at boot time that network script make it up every boot time.
So I want to get mount/umount option under right click services menu. I went to Dolphin -> Settings -> Configure Dolphin -> Services -> Download New Services and from there I installed KDE CDEmu Emulator and MountISO. But neither of them is showing up in actual context menu. Neither in Dolphin -> Settings -> Configure Dolphin -> Services for that matter. I tried to install them as normal user and as a root. I went to have a peak in /usr/share/kde4/services/ServiceMenus/ but they aren't there as well... It's just me or lots of things seems to be not quite working in 11.3?
I recently set up a new web/file server with 9.10 server x64 with 2 NICs and I am trying to configure eth0 to respond to my LAN for internal samba filesharing and eth1 to handle website/ftp requests on my static IP, but whenever eth0 is up the server is not accessible at 173.XX.165.65 for web or ftp but both work fine at 10.1.10.100. When eth0 is down, public IP works fine. I have set /etc/network/interfaces like this:
Code: # The primary network interface auto eth0 iface eth0 inet static address 10.1.10.100
I have a problem on my LAN, then: I have a laptop on which Windows Vista is installed, and every time I try to do ping to my server centos, my centos server does not respond to ping. The server is operating normally, because I found other PCs on my network that communicate normally with my centos server.
I got a CentOS server setup as a dhcp server using dnsmasq. I followed this guide more or less: [URL] So, the problem seems to be concerning the DNS server on the clients. In windows I get the "limited connectivity" icon for the network, and when I select troubleshoot it says the DNS server does not respond. Issuing 'ipconfig /all' clearly shows the IP of the CentOS machine as the DNS server, which should be correct, yes?
ETH0 is working as WAN connection and that works great.. no problem with the WAN connection at all on the CentOS machine. ETH1 has the IP 192.168.0.1 and mask 255.255.255.0 When starting eth1, it sometimes says that it can't start eth1 because the IP 192.168.0.1 is already in use.. but that is most certainly not the case. Maybe there's some kind of issue here that messes with the DNS? What's mind boggling is that it works great on a linux machine (dhcp client) and on a windows xp machine. but it does not work on the windows 7 laptop and a vista laptop and a pda device.
