[sr-dev] [OT] SIP ALG Detector released

[Klaus Darilion]

Nils Ohlmeier schrieb:
> Hi,
> 
> Am 14.06.2009 2:17 Uhr, schrieb Iñaki Baz Castillo:
>> Hi, as part of my personal battle against SIP ALG routers, I've 
>> created an
>> utility to detect such routers:
>>
>>    http://dev.sipdoc.net/wiki/sip-stuff/SIP-ALG-Detector
>>
>> It has two parts: client and server:
>>
>> Basically, the client node running into the LAN sends an INVITE to the 
>> server
>> node (running in a host with public IP).
>> The request could be modified by the LAN router if SIP ALG is enabled.
>> The server encodes the received request in Base64 and appends it to 
>> the SIP
>> response.
>> The client receives the response, decodes the body and gets the 
>> request as it
>> arrived to the server.
>> Then it creates a diff between the original request and the the 
>> request the
>> server node received. These differences are displayed in the screen.
>>
>> Both, UDP and TCP, tests are performed.
>>
>>
>> The client node is coded in Ruby and should work in any operating 
>> system (if
>> Ruby is installed).
>>
>> The server node is also coded in Ruby.
>>
>>
>> For those interested in try it, I have a server node running in my 
>> personal
>> server:
>>    87.98.230.161:5060
>> You can test the client against my server.
> 
> nice idea. Could be handy for techies.
> Even though I did not tried it yet I'm wondering why you/we need a 
> special server for this?
> Wouldn't a sip-router module with this function an even better solution?
> Then every sip-router out there could offer this "service" under some 
> special username.

It could also be implemented by using transformations. Just add a base64 
  transformation and append_to_reply()

regards
klaus