Ubuntu Networking :: One NIC Multiple IP?

Jul 1, 2010

I need the following:Running XAMMP on Ubuntu server with one NIC.Only the webserver has to be available on multiple IP addresses.What i have is 4 devices who communicate with server database servers.

Device 1 = Mysql on IP
Device 2 = Mysql on IP
Device 3 = Mysql on IP


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Networking :: Ping Multiple Devices Via Multiple NICs?

May 20, 2010

I have an old pentium 3 computer that has ~7 NICs installed. These NICs are attached to modems and other networking equipment. According to the linux ping page on computerhope.com, it seems that one could send a ping from a certain specified NIC. How would one go about this?

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CentOS 5 Networking :: Multiple Nics With Multiple Gateway ?

Jun 16, 2009

I have a CentOS 5.3 box with three network interfaces in it. Each interface is attached to a separate VLAN and I want traffic to stay on each network segment.What I can�t figure out is why I cannot get each interface to have its own gateway and everything gets sent through the default gateway.The basically takes my possible 3Gb total bandwidth and throws it down a single 1Gb pipe.Then on top of that, if I take down the interface (ifdown) that has the current default gateway,I loose contact to the other two interfaces.When I look at the routes, each one of the interfaces shows the gw as and defers to the default route. So I delete the route and try to add a new route with:

[root@testsan ~]# ip route add via dev eth2

but end up with the error:

RTNETLINK answers: Network is unreachable

[root@testsan sysconfig]# cat network

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Ubuntu Networking :: Networking Involving Multiple IP Address Types - 192 And 172?

Jul 6, 2011

I have one router, a linksys. It allows wireless and wired connections, as is normal. I have two XP machinesby wire to the router and three linux machines connected wirelessly. The XP machines both have IP addresses beginning with 192.168. while my three linux machines have IP addresses that all begin with 172. None of the machines is connected with a static IP address. All are automatic DHCP.I am told that the above scenario makes no sense. However, such is what I have so, I trust, the theory and the fact do not gel. I would not care except that I cannot see - using the nautilus network servers program, all of the XP computers with some of my linux boxes.

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Ubuntu Networking :: How To Use Multiple Vpn Connection

May 1, 2011

i have a problem in ubuntu and that's "how to connect to multiple vpn Connection at the same time ? " it's so important for me .

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Ubuntu Networking :: Upstart Vs. Multiple IP Addresses ?

Jan 27, 2010

I have run into a problem that I've tracked down to being a conflict between the "Upstart" init system, and how it handles multiple (alias) IP addresses per physical interface. The summary of the problem is that the interfaces are being configured in the background in parallel with the starting of daemons. One "feature" of this (apparently intended for pluggable devices that would add or remove an interface) is that the network daemons are restarted each time an interface is added (and presumably deleted). But this is a disaster when applied to alias IP addresses.

I first saw the effects of this when during booting Ubuntu Server, the screen showed a message about OpenSSH daemon being restarted ... several times a few seconds apart each. At the time I didn't know what was causing that, but didn't worry because it ultimately was running when I needed it.

But now that I am deploying these servers for specific duty with many IP addresses per system (per network interface), the symptoms are becoming serious, and I need a solution.

1. The IP addresses are coming online too slowly. Apparently the time it takes to restart each daemon is being added to each address being configured.

2. It appears to be disrupting some daemons sometimes. Occaisionally, some daemon just ends up being hung somewhere, or dies. Too many restarts.

3. Sometimes few or even no alias addresses get configured. This might be due to a daemon getting hung, and the whole sequence just not finishing.

4. The "nsd" name server as packaged by Ubuntu doesn't deal well with this at all. It needs all its IP addresses to be up when it starts, or else it won't start. The Ubuntu package of it doesn't including any if-up script at all, although I'm not sure that would do any good.

What I need is a way to configure all these alias IP addresses so they are all configured immediately when the point in time is reached to bring up network interfaces for the first time. These are all static, and all are aliases on ethernet NIC cards plugged into PCIe cards, or integrated in the mainboard. None of them are pluggables. I did run a manual test of "ifconfig" in a loop configuring 2540 alias IP address on eth0 and it only took 2 seconds (no if-up triggers or daemon restarts here). So I know it's fast if nothing else is done between these steps.

Even for pluggable physical interfaces, I see no reason to even try to step through every alias (if it has aliases) with a daemon restart. If an alias IP address is added on later, then I can understand doing it. But if you have a list of 100 aliases for a physical interface, they really should all be done ... or at least attempted ... at once, and do any triggers needed after that.

So, how can I configure or modify Ubuntu Server 9.10 to do that?

I have each alias listed in the "/etc/network/interfaces" file with a separate "auto" and "iface" section for each one, with sequential sub-interface numbers appended to the interface name. I tried it without those sections (e.g. just "address" and other items in sequence) and that prevents the system from even coming up (bootable CD to the rescue to undo that). At least cntrl-alt-del did reboot it.

I tried to attach the /etc/network/interfaces file, but I don't know if it worked because I see no confirmations about it. if it didn't attach and you need to see it, say so, and I'll just paste it in a followup.

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Ubuntu Networking :: Connecting Multiple PCs On IPREDator?

Apr 10, 2010

I recently signed up for the IPREDator service, and one limitation I've found is that having 2 computers I cannot have both of them connected at the same time. So, I decided to have 1 of them connected (my 'server'), and have the other route all of its traffic over the 'servers' VPN.

My server connects to the IPREDator VPN on interface ppp0.
My server will allocate ppp1 for the VPN from my client.
My server's LAN address is
My client's LAN address is

On the server perform the following...


sudo apt-get install pptpd

Modify /etc/pptpd.conf to have the following options:


option /etc/ppp/pptpd-options


We need to restart the PPTPD and Networking on the server (I would just restart the server). Make sure you connect to the IPREDator VPN on the server first (otherwise ppp0 won't be assigned to it).Click Network Manager, VPN Connections click on your new VPN.

You should be prompted for your password (default in this guide is just 'password'). You should now be connected via PPTP to your server, which is in turn connected to the IPREDator VPN, and all of your traffic should be tunnelled as such.I've probably made a ton of mistakes in this guide, and there's no doubt a hundred different ways to make this more elegant.

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Ubuntu Networking :: Unable To Use Multiple Name Servers?

Jun 22, 2010

I found one strange issue with ubuntu, can anyone suggest if its a bug or as designed? If I have two nameservers in my resolv.conf, ubuntu only checks the first (and receives a not found reply from there) and never goes to the next two nameservers. This behaviour is very different from windows or other linux systems.

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Ubuntu Networking :: Define Multiple Ip Address On NIC?

Apr 12, 2011

i was installed two ubuntu(1,2) via wmware on my laptop(win=7) on one of them run dhcpserver (ubuntu-1) and i am going to run the other one dhcp client(ubuntu-2) but on the one NIC that belong to my laptop how to config dhcp client (ununtu-2) get ip adres fom dhcserver(ubuntu 1)

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Networking :: Ubuntu 9.10 Apache2 Multiple SSL Sites?

Jan 10, 2010

With hardy, I was able to have multiple SSL sites on the one machine. But I can't seem to get it to work for ubuntu 9.10, I've read that you need to put each SSL site on a different IP. But I was able to do it with hardy without different IP's.

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Ubuntu Multimedia :: Multiple Machine Multiple Display Wall?

Aug 4, 2010

We are working on a project to create a display wall of 8 monitors arranged as 2 high by 4 wide. Each monitor is connected to a single machine and all machines are networked with a master machine with its own, seperate monitor.

Our goal is to get the 8 machines to share a single desktop, with the master machine acting as the server. We have looked at using Xinerama or NMM, but we are unsure about how to get started configuring the multi-machine, multi-head display.

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Ubuntu Networking :: Multiple Devices On Single Network

Jan 14, 2010

I've got a co-worker who is trying to connect multiple devices to his wireless router - Xbox, Wii, TV, Dishnetwork box, etc. Not all of the devices are wireless however. He's had several thoughts on how to get this done and I know very little about this kind of thing so I thought I'd ask some of you.

His first thought was to buy a multi port bridge, but he doesn't like any of the ones he's seen so far.The other thought was to connect all of the devices to a switch and then use a single bridge, but he isn't sure if this would work.

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Ubuntu Networking :: SFTP Multiple Simultaneous Connections

Feb 7, 2010

I really hope someone could help me with this problem. I've been stuck on this for a month.I am using the sftp command to upload files using a bash script.The problem is that it is extremely slow to do it this way. as many of you would know if you have shared server somewhere. I would use scp if remote server supported it, but it doesn't.

Anyway, If any of you have ever used FileZilla, in the Settings, if you go to "Transfers" there is a place where you can set the number of "maximum simultaneous transfers". This feature works wonders with SFTP (and FTP too). It really speeds things up. How do I accomplish this same thing with the sftp command... because I don't want to use a GUI. I don't even mind using FileZilla through the command line if possible... but it does not seem to be possible. I've been stuck on this for a month!!! I've searched everywhere and tried a lot of things with no avail...

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Ubuntu Networking :: 9.10 - Multiple Wireless Connection - Disconnected

Feb 16, 2010

Since I have started to use Ubuntu 9.10, I have had multiple wireless connection troubles. First of all, it says the signal is 2 bars, when in fact my router is right next to me as of right now. Second of all, when I try to connect to it, it asks for my password 3 times, then says disconnected. I'm on a hardwire right now, it's across my keyboard, and I'm in a tangled mess.

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Ubuntu Networking :: Multiple Port Forwarding Firestarter?

Apr 21, 2010

I have a system running 9.10 configured with Firestarter acting as a router. We have multiple Xbox 360's on the network. Unless some ports are forwarded, the Xbox has a NAT type of "Moderate". I have been able to set an Xbox with a Static IP and forward the necessary ports for that IP, which allows the Xbox's NAT to become "Open." My question is, how do I do this for multiple Xboxs? If the follow the same procedure for additional Xboxes, only one Xbox at a time can have an "Open" NAT type, and the rest would be "Moderate". The ports the Xbox uses cannot be changed via the Xbox.

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Ubuntu Networking :: Getting Dynamic Ip Addresses For Multiple Interfaces?

May 6, 2010

I have 4 Ethernet Interfaces. I need Dynamic IP-Addresses for 2 Interfaces. Can anybody help me how can i achieve that

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Ubuntu Networking :: Vnc4server Starts Multiple Sessions?

Jul 1, 2010

if i stop that session, and come back later, it will have me log on at the login screen, but start a new session, with multiple instances of things..now, with vino, i could just keep the same session running, and when i VNC in, it just resumes it.. This one starts a new one.. i even tried just locking the screen, and it still starts a new one...i know there is an easy fix.. lol.. i just cannot find one.. i REALLY like how it shows me the ubuntu login on my server.. that is slick, so id like to keep that, if possible.

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Ubuntu Networking :: Multiple Network Connections On Different Networks?

Sep 20, 2010

I am total newby in Ubuntu 10.04. I have just installed it in my office where I have two networks card one connect to a router giving the internet access and the other connected to the windows based work network providing access to the work network sources. In XP everything works fine as I can keep both connections alive and have the results I want.

However although I don't know how to do it in Ubuntu 10.04. Till now I have setup the first connection directly to my router and I have internet access but I cannot set the other one. Another question is how I can force ubuntu to use the router connection as the default one when I log in.

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Ubuntu Networking :: Bind9 Multiple Cache Forwarders

Dec 10, 2010

I want to setup bind9 so that IPs from one range will use the Google DNS Servers and IPs from another range will work from Opens DNS but am unable to get it working here are my configs.anyone that can help me please?

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Ubuntu Networking :: Multiple Keyring Logon Dialogues

Jan 21, 2011

I would happily do without having to logon to my wireless connection but, apparently, one can either have automatic logon at boot or automatic logon to the network - but not both.Anyway, of late my Ubuntu box has begun to request my network keyring password 2, 3 or 5 times (never 4, though). This was a real nuisance until I discovered that I can respond with my password on the first occasion and simply 'cancel' the subsequent requests.This is not critical but I would love to rid myself of the subsequent dialogue prompts.

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Ubuntu Networking :: Chat With Multiple Windows Friends On LAN?

Feb 12, 2011

i have a lan network in my school that doesnt allow conection to the Internet.
looking for a chat program that would let me (ubuntu10.10) contact other windows users on the network, i found that Pidgin and Bonjour do the trick.

however i could not find a way to chat with several people at a time (eg. create a chat-room). is this a fault of bonjour? is there a different program that can do this?

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Ubuntu Networking :: Multiple Interfaces In Network Manager Have The Same Name

Apr 7, 2011

I have a problem where multiple interfaces in my network manager have the same name. This means that I am unable to have different settings for each interface. Here is my setup:

Ubuntu 10.04 LTS
uname -a: Linux muon 2.6.32-30-generic #59-Ubuntu SMP Tue Mar 1 21:30:21 UTC 2011 i686 GNU/Linux
Adapter 1: 02:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet Controller (Copper) (rev 03)

Adapter 2: HTC Desire tethered via USB. When I start from scratch, with no remembered networks in the network manager, the Ethernet is shown as "Auto Ethernet". When I then connect the HTC Desire, the new network is shown in the network manager also as "Auto Ethernet". Previously, when I right clicked on the network manager and selected "Edit Connections", there were multiple "Auto Ethernet" entries under the wired tab.

Now (and I do not know what changed, sorry), I only see one entry. When I edit this entry (say, add a route), then the route is added for both network interfaces. This used to still work, so I was not worried about the name clash, but now it is causing problems so I need to have a different name for each network interface.

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Ubuntu Networking :: Router With Multiple USB HSDPA Modems?

May 2, 2011

I'm looking with some multiple WAN links on an Ubuntu router box I am building for a project.The setup I'm trying to achieve is this:

eth0 WAN Link 1 through ADSL modem
USB Modem 1 WAN Link 2 for Failover
USB Modem 2 WAN Link 3 for Failover


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Ubuntu Networking :: Multiple Ipv6 Routers On A Subnet?

May 6, 2011

I have a 6to4 tunnel running on Ethernet (subnet 2002:ad4c:16cc:1) without problem. It runs radvd and announces a default route back to the Internet like this: "default via fe80::6a7f:74ff:fe0a:fbec dev br0"

On this same Ethernet I have a Linux plugbox (fe80::225:31ff:fe01:cc) which is a gateway to a network of IPv6 enabled sensors. I've assigned this second subnet 2002:ad4c:16cc:2. How do I get the plugbox to announce "2002:ad4c:16cc:2 via fe80::225:31ff:fe01:cc" so that the hosts on the Ethernet (2002:ad4c:16cc:1) will automatically pick up the route? The route works if I add it to the boxes manually. I've tried getting radvd on the plugbox to do this but I've had no success.

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Networking :: Multiple MAC/IP Address Per NIC?

Jan 13, 2011

I'm trying to setup a CentOS 5.5 with 1 NIC to have several IP addresses on same subnet, each with different MAC addresses. I tried macvlan and multimac but both gives same MAC address (the one of physical NIC) for all IP addresses configured in ARP table on remote hosts. Is it possible to send the 'right' MAC address in ARP requests of corresponding IP address?

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Networking :: How To Utilize Multiple Ext. Ip

Jan 10, 2010

i have 3 external IPs, assigned on eth0, eth0:1 and eth0:2.I have a game bot that connects to a game network, but the game network only accepts a limit of 5 connection from same ip. The game network has multiple IP addresses. (e.g. game.com resolves to,, etc)How do i specify that certain bot connects via eth0:1 and eth0:2? Currently all bots are using eth0's ip

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Networking :: Set Up Multiple Projectors?

Feb 19, 2011

I am supposed to set a system such that, a single desktop screen can be seen in multiple proctors. the situation is something like, we have a seminar and the demo will be shown form a single computer.

We will be using Ubuntu, fedora or openSUSE 11.2

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Ubuntu :: Multiple Notification Areas On Multiple Screens?

Sep 24, 2010

My ubuntu 10.04 has two monitors connected both being treated as individual desktops.But only one desktop is showing the wifi network icon in the notification area.Is it possible to have more than one wifi icon going at one time?

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Ubuntu :: Apply Multiple Themes For Multiple Desktops?

Jan 12, 2011

I'm using Ubuntu 10. I want to apply different themes for desktops.. I want to apply windows 7 theme,ubuntu, mac os themes for my multiple desktops

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Ubuntu :: Extract Multiple 7z Files In Multiple Folders?

Jun 14, 2011

have a large amount of 7z files in multiple folders which I need to extract.The directory structure is like this:

multiple subfolders/
1 or more 7z files per subfolder

I would like to get the output of this action in one separate folder, all together in 1 folder.How can I do this?

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