[OpenSIPS-Users] How to overcome SIP ALG on Wi-Fi routers

Nabeel nabeelshikder at gmail.com
Thu May 5 22:23:32 CEST 2016


Yes, it is definitely listening on the non-standard port:

# netstat -lnp | grep opensips
udp        0      0 162.xxx.x.110:12341     0.0.0.0:*     1750/opensips

In fact, it even seems to register correctly, but the INVITE does not get
through.

I have OpenSIPS set on debug level 4 but did not see anything in the log.


On 5 May 2016 at 21:14, Tito Cumpen <tito at xsvoce.com> wrote:

> Nabeel,
>
>
> Did you verify that your opensips server is listening on this non Standard
> port ?
>
> run
>
> netstat -lnp | grep opensips
>
> On Thu, May 5, 2016 at 4:12 PM, Nabeel <nabeelshikder at gmail.com> wrote:
>
>> Tito Campen, I took the trace on my OpenSIPS server, which is the
>> receiving proxy. However, OpenSIPS did not add anything to the server's log
>> itself.
>>
>> On 5 May 2016 at 21:08, Tito Cumpen <tito at xsvoce.com> wrote:
>>
>>> Nabel, You should should take a trace at the receiving proxy to verify
>>> the traffic is even getting there. If there is no sdp received from the UAS
>>> you would not see rtp traversing at all. Using non Standard points doesn't
>>> assure you that messaging traffic will traverse.
>>>
>>> On Thu, May 5, 2016 at 3:54 PM, Tito Cumpen <tito at xsvoce.com> wrote:
>>>
>>>> Adding to Bogdan's point I am successfully using sip tls on port 443
>>>> without any issues as of yet. It's bypassing some  isp enforced algs as
>>>> well as those enforced by local routers. :-).
>>>>
>>>>
>>>>
>>>>
>>>> On Thu, May 5, 2016 at 3:35 PM, Nabeel <nabeelshikder at gmail.com> wrote:
>>>>
>>>>>
>>>>> Please check the following SIP trace taken within a WiFi network. The
>>>>> call fails to connect despite the INVITE request and using a non-standard
>>>>> port. Could this be caused by SIP ALG, or some unopened RTP port on the
>>>>> router?
>>>>>
>>>>> http://pastebin.com/raw/C4iymTbh
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
>>>
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>>>
>>
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>>
>
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