I am currently running a Tor exit node on a private server. This has caused the IP to be blacklisted from many services, mainly Freenode’s IRC server. In order to circumvent this I used SoYouStart’s built in “failover ip” service to create a second IP address I can bind applications to that were blacklisted, like an IRC client. My server comes with 16 free IP addresses I can virtually assign to the same NIC. There was a $3 set up fee though.

After getting the IP address assigned by the provider, I modified my /etc/network/interfaces file, adding this entry

auto eth0:1
iface eth0:1 inet static
        address [IP.ADDRESS.SYS.GAVE.ME]
        netmask 255.255.255.255

Once this was added a simple

/etc/init.d/networking restart

added the interface!

eth0      Link encap:Ethernet  HWaddr *:*:*:*:*:*
          inet addr:[ORIGINAL.SERVER.IP.ADDRESS]  Bcast:[ORIGINAL.SERVER.IP.ADDRESS]  Mask:255.255.255.0
          inet6 addr: [ORIGINAL:SERVER:IPv6:ADDRESS]::/64 Scope:Global
          inet6 addr: [ORIGINAL:SERVER:IPv6:ADDRESS]::/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:96259868 errors:0 dropped:0 overruns:0 frame:0
          TX packets:89513036 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:69831382581 (65.0 GiB)  TX bytes:56016587742 (52.1 GiB)
          Interrupt:20 Memory:fe500000-fe520000

eth0:1    Link encap:Ethernet  HWaddr *:*:*:*:*:*
          inet addr:[IP.ADDRESS.SYS.GAVE.ME]  Bcast:[IP.ADDRESS.SYS.GAVE.ME]  Mask:255.255.255.255
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:20 Memory:fe500000-fe520000