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Date: Mon, 20 Aug 2007 09:53:55 -0700
From: John-Mark Gurney <gurney_j@resnet.uoregon.edu>
To: Igor Sysoev <is@rambler-co.ru>
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Cc: freebsd-net@freebsd.org
Subject: Re: maximum number of outgoing connections
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Igor Sysoev wrote this message on Mon, Aug 20, 2007 at 19:11 +0400:
> It seems that FreeBSD can not make more than
> 
> net.inet.ip.portrange.last - net.inet.ip.portrange.first
> 
> simultaneous outgoing connections, i.e., no more than about 64k.
> 
> If I made ~64000 connections 127.0.0.1:XXXX > 127.0.0.1:80, then
> connect() to an external address returns EADDRNOTAVAIL.

Isn't this more of a limitation of TCP/IP than FreeBSD?  because you
need to treat the srcip/srcport/dstip/dstport as a unique value, and
in your test, you are only changing one of the four...  Have you tried
running a second we server on port 8080, and see if you can connect
another ~64000 connections to that port too?

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."