On Monday, 9th July 2001, Terry Lambert wrote:
>Kenneth Wayne Culver wrote:
>>
>> I think I found the reason that my FreeBSD box is performing
>> so poorly as a NATing router. When I do an ipnat -l to see
>> what "active connections" are there on the router, a list
>> about 3 pages long (using ipnat -l | more) appears. I think
>> maybe it's having trouble because for every packet coming in
>> and out of the router, it's got to look at that list of
>> active connections for the right one to send to and from. Is
>> there any way to make connections that aren't being used go
>> away from the NAT faster? Thanks a lot.
>
>Don't run unnecessary daemons.
>
>The pcb lookups are a linear traversal, as well, and for
>a large number of connections, the calllout wheel for
>timers sucks.
I can't imagine even the most inefficiently coded linear traversal
causing this problem given the beefy machine being used.
I set up a cable sharing system for friends of mine and it is a Pentium
100 with 2 ISA NICs! That system adds no more than 2 or so ms to the
latency with 3 simultaneous counterstrike players. I used ipfw and natd
in a trivial configuration on 4.3-R.
I wonder if the problem is a lack of mbufs or some similar misconfiguration
tragedy. "netstat -m" and "top" output might be helpful.
Stephen.
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