[Serusers] Scaling SER

[Natambu Obleton]

Ohh.. I thought the keepalives would allow other ip address, than the one
that originally opened the connections, to send in. 

I guess that wouldn't be very secure would it.... :)


Natambu Obleton
Network Engineer
FastTrack Communications
nobleton at fasttrackcomm.net
(970) 247-3366 office
(970) 247-2426 fax
 

-----Original Message-----
From: serusers-bounces at lists.iptel.org
[mailto:serusers-bounces at lists.iptel.org] On Behalf Of Vitaly Nikolaev 
Sent: Tuesday, September 19, 2006 8:53 AM
To: serusers at iptel.org
Subject: RE: [Serusers] Scaling SER

To extend Juha's info:

Only SER server that just received SIP packet from SIP device (either
register or keepalive) can send something  back in case of NAT

For example you have SER1 and SER2, client A registered on SER1 and
client B on SER2, when client B sends call to client A it will first hit
SER2 then SER2 to according to replicated location table will try to
send it to client A straight and fail in case client A behind the nat
(which is quite often in real world)

Trick is to teach SER2 to forward call to SER1 when needed, it can be
done when you use b2bua that looks to same location table for example
(ser need to be taught to place its IP also in same table).

Can not give you exact howto but can give (out of list) some references
to  commercial software if interested.


-----Original Message-----
From: serusers-bounces at lists.iptel.org
[mailto:serusers-bounces at lists.iptel.org] On Behalf Of Juha Heinanen
Sent: Tuesday, September 19, 2006 8:52 AM
To: Andrey Kuprianov
Cc: serusers at iptel.org
Subject: Re: [Serusers] Scaling SER

Andrey Kuprianov writes:

 > mediapoxy'll handle it.

mediaproxy does not forward sip requests.

-- juha
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