SYN limit

Olivier Nicole on at cs.ait.ac.th
Sun Oct 9 23:52:22 PDT 2005


> FreeBSD has no SYN rate limit, but you could be running into TIME_WAIT 
> recycling issues.

I already set tcp.msl to 5000 to release the TIME WAIT quickly.

> Run a netstat on both the client and server, see if the port numbers 
> match.  For example, see if the client is trying to connect to port 3549 
> and the server has a TIME_WAIT socket on port 3549.  The connection is 
> supposed to recycle, but under certain conditions it might not...

I could not find any port conflict.

> After doing that, try setting net.inet.ip.portrange.randomized=0 and see 
> if the problem clears up at all.

Tried that too but it dod not help.

olivier


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