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Re: [Linphone-developers] How to overcome SIP ALG on Wi-Fi routers


From: Nabeel
Subject: Re: [Linphone-developers] How to overcome SIP ALG on Wi-Fi routers
Date: Tue, 3 May 2016 01:37:54 +0100

Thanks for the suggestions of using TLS or changing the port. I changed the port, but some routers are still able to mess with the SIP headers. I would have used TLS, if not for two reasons:

1. ICE protocol was originally designed for UDP according to RFC5245, and it seems to work better with UDP.

2. The SIP servers I have used (OpenSIPS and Repro) seem to be more stable with UDP compared to TLS (they do not randomly drop connections, throw unusual errors in the logs, etc.)

I may try TLS again, but it would be better if there is an alternative workaround for UDP.

On 2 May 2016 at 21:55, Matt Cornish <address@hidden> wrote:
Changing the transport type to TLS will also do the trick.

Cheers,
Matt.
Hi,

Other than using STUN/TURN functions, is there any way to
bypass/workaround SIP ALG enabled on many WiFi routers? Although SIP
ALG was designed to help with NAT, in most cases it does the opposite
and breaks SIP.

Nabeel



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Message: 7
Date: Mon, 2 May 2016 13:32:58 -0400
From: Russell Treleaven <address@hidden>
To: address@hidden
Subject: Re: [Linphone-developers] How to overcome SIP ALG on Wi-Fi
        routers
Message-ID:
        <address@hidden>
Content-Type: text/plain; charset="utf-8"

Someone should talk to the router manufacturers and get them to disable the
ALG's.



On Mon, May 2, 2016 at 1:14 PM, Tristan Mah? <address@hidden> wrote:

Encrypt the sig, change the server port to something else than 5060, etc..

On 05/02/2016 05:16 AM, Nabeel wrote:

Hi,

Other than using STUN/TURN functions, is there any way to
bypass/workaround SIP ALG enabled on many WiFi routers? Although SIP ALG
was designed to help with NAT, in most cases it does the opposite and
breaks SIP.

Nabeel


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