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<TITLE>RE: [Serusers] NAT and protocol aware firewalls</TITLE>
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<P><FONT SIZE=2>Yes, I think this solves the problem.<BR>
I've done som testing and it seems to work fine.<BR>
<BR>
I should probably check cisco if this is a bug in my sw version.<BR>
<BR>
best regards<BR>
hw<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: Jan Janak [<A HREF="mailto:jan@iptel.org">mailto:jan@iptel.org</A>]<BR>
Sent: Sun 9/5/2004 5:36 PM<BR>
To: Helge Waastad<BR>
Cc: serusers@lists.iptel.org<BR>
Subject: Re: [Serusers] NAT and protocol aware firewalls<BR>
<BR>
If you are the fixup functions of the Cisco box then it should obey the<BR>
expires interval returned by registrar in 200 OK to REGISTER. If it does<BR>
not work then you can either disable the functionality or you can set<BR>
modparam("registrar", "max_expires", 1800) in your ser.cfg<BR>
<BR>
Jan.<BR>
<BR>
On 01-09 22:06, Helge Waastad wrote:<BR>
> Hi,<BR>
><BR>
> I just want to dwell around a couple of things.<BR>
><BR>
> Several vendors have "application awareness" for instance Cisco has<BR>
> <fixup protocol sip...><BR>
><BR>
> Hence the ser will not se the client as nat'ed and will not send<BR>
> nat-ping to the clients.<BR>
><BR>
> <BR>
><BR>
> If the client does not support some kind of keep-alives, I guess you<BR>
> will loose connectivity with the clients when standard register expiry<BR>
> is 3600 sec. (off course until the next register message is sent)<BR>
><BR>
> The Cisco PIX, for instance, have a standard (however configurable) sip<BR>
> inactivity timer = 1800sec.<BR>
><BR>
> <BR>
><BR>
> What would actually be the best way of dealing with this?<BR>
><BR>
> <BR>
><BR>
> Best regards,<BR>
><BR>
> hw<BR>
><BR>
<BR>
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<BR>
<BR>
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