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Thread: rule limit question




rule limit question
user name
2007-08-13 17:52:22
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For relatively obscure reasons, I am trying to build a set
of rules that run into the hundreds of thousands.  I was
experimenting on a Redhat Release 5 machine with 2.6.18
kernel and 1.3.5  iptables.  I was able to load around 340k
rules before getting an error of iptables-restore: line
XXXXXX failed.

So I try it out on a server (much beefier, 8G ram, dual quad
core 2GHz proc) running the same kernel/iptables versions. 
This time it died in the same way at about 40k rules.  After
some research I found a log message on Vmalloc failures, so
I figured what the hell and rebuilt the server using the 64
bit version of RH 5.  Now no more vmalloc failures, but
still dies at around 40k entries.

I am more than happy to build a custom kernel if that what I
need to do.  I have poked around the sources and it is not
obvious what needs to change.

Any help would be appreciated.

Thanks!

- --->  Phil
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