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Ubuntu IP Configuration - multiple subnets & interfaces

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http://serverfault.com – Have a 'new' mailserver running postfix on Ubuntu. We are having some problems configuring the subnets & interfaces. Basically 2 subnets (.253. & .254.) need to be connected through the 3rd subnet (.252.) where the Router is residing. # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address 10.62.254.199 netmask 255.255.0.0 network 10.62.254. (HowTos)

taskli's picture
Submitted by taskli on 12/03/2012

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Hey all,

I'm having a really odd issue.

I just upgraded my 11.11 server to 12.04, by performing a clean install.

I edited my /etc/network/interfaces file to the following:

Code: # This file describes the network interfaces available on your system # and how to activate them.

Hi there,

I am new ubuntu user. I have tried to configure wireless usb adapter on my 9.10 desktop. Adapter did worked fine, but I have problems with wired connection now:

I can ping my router. Skype works fine (don`t need DNS), internet on virtual machine (winXP) works too.

THis is CAT of interfaces:

Hi !

Hi All,

I have 2 NICs in my U9.04 Server box (eth0, eth1). After I added 2 virtual interfaces for each physical interface (eth0:1,eth0:2,eth1:1,eth1:2), the MAC addresses of all the interfaces have changed to that of eth0. Because eth1 was configured to be on my local network, I can't access the box remotely anymore.

I'm wondering if I've found a bug in ifupdown, but I wanted to ask here before reporting a bug:

/etc/network/if-up.d/upstart seems to fail to emit static-network-up if any virtual interfaces are defined.

I have debian hosts which are connected through trunk port on 5 different vlans. But this host respond to arp "who-has" requests of all of their differents ip.

I have 3 network cards installed in my ubuntu 10.04 server and I want to configure Internet sharing and file sharing on eth1 for wired users and wlan0 for wireless users.

Static ip: eth0: 192.168.1.1 eth1: 10.0.0.15 wlan0: 10.0.0.20

/etc/network/interfaces

# The loopback network interface auto lo iface lo inet loopback

# The primary network interface auto eth0 iface eth0 inet static address 19

I am trying to setup a VPN server on Ubuntu 12.04. I think my network interfaces configuration is wrong. In my syslog, I'm seeing that iptables is denying some stuff, so I've posted my iptables rules as well.

I follow instalation from here wiki.ubuntu.com/ServerTeam/MAAS and I decide to do something like this: [Attached file] And on MaaS server i install dnsmasq and make it DHCP server.

I leave this blank. And in etc/network/interface I have this:

Code: # This file describes the network interfaces available on your system # and how to activate them.