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Date:	Mon, 30 Nov 2009 11:13:55 -0600 (CST)
From:	Christoph Lameter <>
To:	Patrick McHardy <>
cc:	Christian Hentschel <>,
Subject: SIP proxying: siproxd vs. Netfilter SIP nat

It seems that the current sip nat module in the kernel has only limited
functionality. According to

one has to point the firewall at the target host for the SIP proxying to
work. Therefore the kernel will only support a single inside phone
connecting via SIP to the outside. For a network that has a series of
phones inside the NAT zones this means that the firewall sip nat is not

siproxd seems to be able to handle
multiple outgoing SIP connections but one needs to specify an outbound
proxy for each inside SIP phone.

Isnt there a way to make the kernel module work in the same way siproxd
works and able to support multiple phones? Right now configuring SIP
connectivity is a messy thing that is not easily setup. Can we fix this?

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