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Re: router/gateway limit problems
On Dec 30, 2009, at 12:17 AM, Chris Ross wrote:
> I have a netbsd-5 host running as my local router. i386. For quite a
> while, during heavy traffic times, I'm seeing the following on the console:
> Dec 30 00:14:04 router named: socket: too many open file descriptors
> Now, I'm sure there is some configurable parameter to either the kernel, or
> named's environment that could alleviate this problem, but I've been unable
> to figure it out so far. This router is, as you'd guess, running a caching
> nameserver and is the primary nameserver for all connected networks.
> Could anyone advise me? Thanks.
It's probably related to the security hack that's in named, to move queries
around across a group of many different sockets. I think that the best you can
do is to increase the number of file descriptors available to named via a
ulimit command. What I do is have
ulimit -n 256
in /etc/rc.conf.d/named, but you can (and probably should) go higher than 256.
--Steve Bellovin, http://www.cs.columbia.edu/~smb
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