by This is very weird: I have a linux box based on RedHat 7 which hosts an IP
based virtual domain in addition to the native domain; the machine is on the
end of a DSL line. All functions of the native domain (apache, sendmail,
ssh, etc.) work fine. All functions of the virtual domain (apache, sendmail)
were working up until Sunday. Then it just stopped working! I made no
changes to the system at all! Monday I find I'm getting no e-mails, I can't
reach the virtual domain from the outside world (but can from other machines
on the same side of the DSL line). My ISP says that my IP address for the
virtual domain doesn't appear in their arp cache (and never did!)! How can
this be? It worked before!!! Also, I can't ping my ISP's gateway with the
virtual domain's IP address but can with the native domain's IP address
(which I guess is what you'd expect if the gateway has no listing of my IP
and hardware address in it's arp cache).
Has anyone seen this before? Does anyone have a solution?
Thanks,
Mike