Cell C blocking VOIP on their network?

[deweyzeph]

Hi Guys

I am trying to connect to various VOIP providers through my Cell C prepaid sim card, but Cell C seems to be blocking access to port 5060 (SIP port). It doesn't matter which provider I try, I just cannot connect to port 5060 with any provider. It seems like Cell C has blocked access to VOIP on its network.

Anyone else experiencing this?

 

[ginggs]

It looks like the traffic is getting through Cell-C's network:

$ tcptraceroute sip.iburst.co.za 5060
Selected device wwan0, address 197.168.110.14, port 52553 for outgoing packets
Tracing the path to sip.iburst.co.za (196.2.126.52) on TCP port 5060 (sip), 30 hops max
 1  * * *
 2  10.228.223.70  108.484 ms  121.823 ms  117.889 ms
 3  41.48.16.1  120.008 ms  295.716 ms  310.348 ms
 4  41.48.0.3  939.394 ms  116.206 ms  133.841 ms
 5  41.48.253.38  129.918 ms  99.442 ms  100.712 ms
 6  iburst.jinx.net.za (196.223.14.26)  119.072 ms  109.918 ms  144.354 ms
 7  pdist2-ge03.jhb.wbs.co.za (41.213.126.18)  372.910 ms  95.724 ms  189.863 ms
 8  192.168.0.97  97.872 ms  535.745 ms  408.336 ms
 9  * 192.168.0.97 100.739 ms !A *

 

[Peon]

It looks like the traffic is getting through Cell-C's network:

$ tcptraceroute sip.iburst.co.za 5060
Selected device wwan0, address 197.168.110.14, port 52553 for outgoing packets
Tracing the path to sip.iburst.co.za (196.2.126.52) on TCP port 5060 (sip), 30 hops max
 1  * * *
 2  10.228.223.70  108.484 ms  121.823 ms  117.889 ms
 3  41.48.16.1  120.008 ms  295.716 ms  310.348 ms
 4  41.48.0.3  939.394 ms  116.206 ms  133.841 ms
 5  41.48.253.38  129.918 ms  99.442 ms  100.712 ms
 6  iburst.jinx.net.za (196.223.14.26)  119.072 ms  109.918 ms  144.354 ms
 7  pdist2-ge03.jhb.wbs.co.za (41.213.126.18)  372.910 ms  95.724 ms  189.863 ms
 8  192.168.0.97  97.872 ms  535.745 ms  408.336 ms
 9  * 192.168.0.97 100.739 ms !A *

Those pings are terrible. Nonetheless all cell network providers in SA fiddle with VOIP traffic. Ask your provider if you can create a VPN tunnel to connect through, magically you will find all your problems will disappear.

EDIT: We proved it using wireshark - cell networks dont like VOIP on their networks.

 

[bromster]

Lol. I didn't even think that a stable Skype conversation was possible on CellC