[Freeswitch-users] Use local IPv4 for specific LAN IP address range

[Steven Ayre]

One simple option would be to have a 2nd profile listening on another port
(eg 5080) that does not use ext-*-ip and connect to that internally.

-Steve



On 7 February 2013 11:44, Ben <ben122uk at gmail.com> wrote:

> Greetings all,****
>
> ** **
>
> A question on NATing in Freeswitch – I have my internal SIP profile to use
> a static public IP for the ext-sip-ip and ext-rtp-ip.  The Freeswitch
> server is on a local LAN IP, for example 192.168.0.10.  External SIP
> clients can access the server via the external IP, as there’s a static NAT
> on the router to map the public IP to the private IP.****
>
> ** **
>
> I have another SIP client on a different LAN, but behind the same
> firewall, for example, 10.0.0.10.  This client is allowed to talk to the
> server on its private ip of 192.168.0.10, by allowing inter-vlan traffic to
> pass through.  My challenge is, how do I get Freeswitch to recognise this
> internal SIP client as being allowed to use the internal IP for SIP/RTP
> communications, and therefore present the client with internal addresses in
> the SIP header for SIP/RTP?  Due to statically setting ext-sip-ip and
> ext-rtp-ip, Freeswitch tells the client to go via the public IP.  The
> firewall has a policy to not accept traffic to the public IP if sourced
> from an internal device.****
>
> ** **
>
> I have explored the NATing options in Freeswitch, but can’t find anything
> that fits my scenario.  It seems to be more towards how to enable NAT in
> certain situations, not disable it.  I have also looked at re-writing the
> SDP, but this re-writes the incoming SDP from the clients.  My intention
> was to re-write the outgoing SDP from the Freeswitch to include the
> internal IP address as the RTP connect in address.****
>
> ** **
>
> I don’t have much Asterisk experience, but I seem to remember a nat.conf
> file where you could specify subnets that were treated differently.  These
> could be classed as internal subnets, and would be given the private IP in
> the SDP from asterisk, everything got the public IP.****
>
> ** **
>
> I’m also aware that I could create another SIP profile easily with
> different NATing/IP options, but I want to find out if there’s anything I
> can do with the above first.****
>
> ** **
>
> Many thanks for the help!****
>
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