what to do after an IP change

[James Wilkinson]

Robert wrote:
> ... let's say you have a hosts file that looks like this:
> 127.0.0.1 localhost localhost.localdomain fred fred.localdomain
> 
> When you ping fred, you get something like this:
> [root at fred rj]# ping fred
> PING localhost.localdomain (127.0.0.1) 56(84) bytes of data.
> 64 bytes from localhost.localdomain (127.0.0.1): icmp_seq=0 ttl=64 
> time=0.047 ms
> 
> If you leave the ping running and run ifconfig a couple of times, you 
> can see that the counters for the loopback interface, lo, is incrementing.
> 
> Now if you clean up the hosts file:
> 127.0.0.1       localhost.localdomain   localhost
> 192.168.1.8     fred.localdomain        fred
> 
> ...and again ping fred, you get different results:
> 
> [root at fred rj]# ping fred
> PING fred.localdomain (192.168.1.8) 56(84) bytes of data.
> 64 bytes from fred.localdomain (192.168.1.8): icmp_seq=0 ttl=64 
> time=0.058 ms
> 64 bytes from fred.localdomain (192.168.1.8): icmp_seq=1 ttl=64 
> time=0.045 ms
> 
> This time, the ethX interface at 192.168.1.8 is being hit and the 
> counters for the ethX interface are incrementing.

Well, given those hosts files, that's what's supposed to happen. You
ping the interface, and lo and behold, traffic goes to that interface!

> This is the result I expect when I ping myself.
                     ^^^^^^^^
Maybe that's the bug...

> Besides that, it's MY machine and that's how EYE want it to be! ;-)

Well, you go and change your machine.

James.

-- 
E-mail address: james@ | So what would happen if an Enterprise security team,
westexe.demon.co.uk    | who always get killed soon after appearing, fought a
                       | squad of Imperial Stormtroopers, who can't hit the
                       | broad side of a planet?