El Jueves, 18 de Junio de 2009, Daniel-Constantin Mierla escribió: > Hello Inaki, > > On 06/14/2009 02:17 AM, Iñaki Baz Castillo wrote: > > 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. > > thanks for it, sounds very useful. What I see missing here is the case > when the alg screws the routing so the reply does not get back to phone > (e.g., via replaced on the way out but not changed back for reply), so > it might be good to have like an ack when the reply was received by the UA. > > Or maybe would be better to do the other way. The client sends the > request encoded to the server, the server unecodes it, does the diff and > decides whether it is a possible alg in the middle. > > I think it is very useful, as the server would also know alg presence > state :-).
Thanks Daniel, I'll think about it in order to improve it. -- Iñaki Baz Castillo <i...@aliax.net> _______________________________________________ Kamailio (OpenSER) - Users mailing list Users@lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
