[TriLUG] telnet from non-default ip

[Aaron Schrab]

At 17:08 -0400 31 Oct 2008, jason tower <jtower at cerient.net> wrote:
>server "mikey" with two public ip addresses 1.2.3.4 (eth0) and 1.2.3.5 (eth0:0). 
>  to troubleshoot something i need to telnet from mikey to some remote ip, but i 
>want the source ip to be 1.2.3.5 instead of the default 1.2.3.4.  the telnet 
>client does not appear to support any such mechanism, and i can't turn 
>off 1.2.3.4 as it is a production box.  how can this be accomplished?

The telnet clients (in both the telnet and telnet-ssl packages) on 
Debian and Ubuntu systems support specifying the source IP with the -b 
option.

Also, netcat (also known as nc) allows this to be specified with the -s 
option.