It's would be undesirable to lock against both the IP address and
the site name. So I won't.
Should I switch from IP address to site name, or leave it as it is?
This is the heart of the site-lock problem for most multi-site crawlers. And
from the study I did, there was just as many problems locking against IP
addresses as against hostnames. There may be multiple IP addresses
per hostname, multiple hostnames per IP address, or both.
I didn't come to a proper conclusion, but I ended up sticking with IP address
locking. The proper thing would be to uniquely identify each "site". This
would involve a lot of work, playing around with forward and reverse name
lookups and a fair amount of by-hand editing.
I don't think that there is a simple way to do it otherwise (suggestions?),
though this is one of the extensions to the REP that I had proposed a while
back.
gregf.