[Serusers] Proxy sending ACK on port 5060 instead of on contact port

Zeus Ng zeus.ng at isquare.com.au
Wed Sep 15 12:07:23 CEST 2004


Mahesh,

I don't see anything wrong with IPTEL's proxy server. It's behaving well.
The ACK is sending to HOST2 via the their proxy. What exactly is your
problem?

BTW, what kind of SIP-ALG are you using. It's kind of strange that it has a
different CONTACT header yet it works. 

Zeus

> -----Original Message-----
> From: mahesh [mailto:mahesha at intoto.com] 
> Sent: Wednesday, 15 September 2004 7:12 PM
> To: Zeus Ng
> Cc: serusers at lists.iptel.org
> Subject: RE: [Serusers] Proxy sending ACK on port 5060 
> instead of on contact port
> 
> 
> Hi Zeus,
> 
> I am attaching the ethereal captures of both fw1 and fw2(on 
> wan interfaces). The NAT IP used by fw1 is 202.125.84.164 and 
> the one used by fw2 is 
> 202.125.84.163
> 
> regards
> Mahesh
> 
> 
> >Mahesh,
> >
> >Given that you have ethereal capture, send it in to the list 
> and we can 
> >see what's happening.
> >
> >Zeus
> >
> > > -----Original Message-----
> > > From: serusers-bounces at lists.iptel.org 
> [mailto:serusers-bounces at lists.iptel.org] 
> > > On Behalf Of mahesh
> > > Sent: Wednesday, 15 September 2004 5:15 PM
> > > To: serusers at lists.iptel.org
> > > Subject: [Serusers] Proxy sending ACK on port 5060 instead of on 
> > > contact port
> > >
> > >
> > > Hi all,
> > >
> > > I am using the following configuration to test SJPhone 
> through IPTEL 
> > > proxy server(publicly
> > > available:195.37.77.99).
> > >
> > > HOST1(win2K)---FW1---Internet---FW2---HOST2(winXP)
> > >
> > > Host1 and Host2 are hosts with private IPs having SJPhone 
> > > application. FW1 and FW2 are
> > > firewall/NAT devices with SIP-ALG implementation. This means
> > > all the SIP
> > > messages are modified to include the public IPs in them. Also the
> > > via,contact ports are modified. Now both host1 and host2
> > > register with the iptel proxy server. A call is initiated
> > > from host1. Host2
> > > sends 200 OK response
> > > to the HOST1. After this the ACK sent by Host1 is sent to
> > > port 5060 on
> > > HOst2,instead of the
> > > contact port advertised in 200 OK. This is observed from
> > > ethereal captures
> > > on Host2. All these
> > > messages are going through the proxy server(195.37.77.99).
> > >
> > > Can someone please tell me why the proxy server is behaving this 
> > > way, i.e. sending ACK on 5060
> > > instead of the contact. Is there anything that i am missing
> > > here or doing
> > > wrong.
> > >
> > > Thanks
> > > Mahesh
> > >
> > > _______________________________________________
> > > Serusers mailing list
> > > serusers at lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers
> > >
> 




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