Hello folks,
Recently I have been corresponding with several from this list and questions@ with
regard to an odd issue with ipfw and my machine panicing after any network
communication
was attempted after loading some IPFW rules.
Some evidence of the panics can be found at:
http://dipole.informationwave.net/~abe/fbsd.jpg
http://dipole.informationwave.net/~abe/crash.mpg
http://dipole.informationwave.net/~abe/trace.txt
Unfortunately, feedback sent while in good intentions did not help. However, in
further
tinkering with this issue I believe I've come to a conclusion. I run a rather
high-traffic
server so I had initially increased net.inet.ip.fw.dyn_buckets to 500, from the
default 256
as people were complaining that they were getting connection refusals. At the time of
the
complaints, it seemed the max dyn_buckets limit had been reached. In attempt to
remedy this
as I said above I increased it. After this week of going through many hardware tests
and so
forth trying multiple machines with the same rules and numerous fresh installations,
tonight I set the default net.inet.ip.fw.dyn_buckets back to 256 and no issues. So
then on a chance,
I increased the value to 512. After this, I attempted to reproduce the panic with the
same
procedure I had taken before making this change. No panics post-change.
I'm going to be keeping a close eye on this server and hoping that it was as
simple an issue
as that, and if not of course pursue the answer until it is found. If anyone has any
comments or
thoughts on this, please feel free to contact me on or off the list.
Regards,
Abe
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