[Serusers] NAT and protocol aware firewalls

[Helge Waastad]

Hi,

I just want to dwell around a couple of things.

Several vendors have "application awareness" for instance Cisco has
<fixup protocol sip...>

Hence the ser will not se the client as nat'ed and will not send
nat-ping to the clients.

 

If the client does not support some kind of keep-alives, I guess you
will loose connectivity with the clients when standard register expiry
is 3600 sec. (off course until the next register message is sent)

The Cisco PIX, for instance, have a standard (however configurable) sip
inactivity timer = 1800sec.

 

What would actually be the best way of dealing with this?

 

Best regards,

hw

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