> Just so you couldn't say that no one answered you, I came up with a few
> diagnostic questions/things you might want to try:
Thanks Bob ;)
> 1. Can you perform DNS lookups on the web server?
Yup.
> 2. Does anything show up in the httpd log files?
Not a word. I've been looking very frequently. The only thing that showed
up in the logs relating to this at all was when the machine ran out of
file descriptors.
> 3. How about the DNS server log files?
Nothing there either
> 4. Does it leave one "connection" for each DNS lookup or is it more
> sporadic?
That I can't tell for sure, because I can't tell exactly how many looks
the machine is attempting to do without sniffing them all first. I would
assume it to be somewhat more sporadic because of the ratio of hits to the
webserver/stale dns connections.
> 5. If you run nslookup from the web/mail server (pointed at one DNS or
> the other), does it leave open udp "connections" also?
nope, none. I had tried this initially to see if it was related to DNS
resolution on the entire machine, or specific to certain applications.
> 6. Were the xinetd connections also DNS UDP connections?
correct. But i've only ever seen two of such connections originating from
xinetd.
> 7. Is it just DNS, or something broader affecting all UDP?
Specific to DNS only.
> 8. What's the deal?
I wish I knew. I've tried re-installing apache a few times because I
thought it might be a culprit.. no luck. Same results even from the apache
rpm's from redhat.
My initial thought was that it had something to do with glibc, but I could
find anything conclusive to prove this theory.
Thanks for the response,
Joshua Hirsh
efni CONNECT
UNIX Systems Administration
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