Re: IP masquerade limits?

Rik van Riel (H.H.vanRiel@phys.uu.nl)
Fri, 10 Jul 1998 08:36:55 +0200 (CEST)


On Thu, 9 Jul 1998, Larry McVoy wrote:

> Does ayone have any experience on the maximum number of hosts that can
> be masqueraded with one machine? Assuming that you don't run out of CPU
>
> Given 60K ports or so, if you assume everyone is netscaping away, seems
> like the limit is probably somewhere in the 5K active users range. Am I
> even close?

I believe that TCP connections are identified by the port
numbers of both hosts. This means you can open an ftp (21)
connection to ftp.funet.fi at the same time I am.

This would give you 60k**2 = 3600M possible connections
between 2 machines ;)
I believe you start running into other resource limimits
first, though. Mainly the timeout time, since you would
need to keep a lot of connections alive...

Rik.
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