On 9/17/07, Chuck Swiger <[EMAIL PROTECTED]> wrote:
> On Sep 16, 2007, at 11:03 AM, Chuck wrote:
> > does anyone have a spec on the average duration time an active time
> > request /
> > response lasts? we are trying to find connection states of 1 in /
> > proc/net/udp
> > and find it almost impossible.

UDP is a connectionless protocol, so I would not expect to ever find
any UDP "connections" in state 1.

If the router in question is running NAT, it does need to keep track
of UDP flows in order to match incoming UDP packets from the Internet
with the previously-transmitted UDP packet(s) which elicited the
response. The router needs to do this so that it will know which of
your internal IP'd hosts it should send the packets to.

Since UDP is connectionless, the NAT router has no way to know whether
any further UDP packets will be forthcoming in a given UDP flow, which
is why routers generally expire UDP flows from their NAT tables based
on time-of-inactivity, or upon the table approaching or becoming full.

Rusty
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