Junk calls OBI202

[Rick_Hall]

I have been noticing that when i use the obi202 as a router people are able to send junk calls to the device and it will just ring and ring. Is there a fix for this?

[Felix]

yes. several, in fact. Search this forum for "SIP scan"

I doubt that this is related to having OBi202 as a router - but who knows!

[Rick_Hall]

I know its coming from a sip scan ive used those tools before they are higly annoying was just wondering if there was a way to plug the hole since i believe the 202 opens port 5060. seems like its allowing annonymous sip traffic. Seen this before on asterisk but they seemed to fix that.

[Shale]

I doubt that this is related to having OBi202 as a router - but who knows!

I would expect that if the OBi202 is behind a router, there would be no way to scan. We did not have to DMZ the OBi or open a port through the router.
I now know that you can be scanned through a NAT router. I had a single bogus call, and I took action before my normal wake time. If you can take the preventative action at your leisure, it would be better.

[Felix]

... i believe the 202 opens port 5060 ...

202 opens what you tell it to open. again - look for a long thread on sip scanners; several remedies are listed there. For me the best solution was to switch from 5060 to 5064; and scanning stopped. Others used digit map rules. Search, and ye shall find!

[Rick_Hall]

I changed the port to way off the scope of sip and they stopped but i feel like OBIhai should take action to not allow anonomyous inbound sip calls.

[giqcass]

I just got my first bogus call.  It came in through port 5062.  CID listed the number as 1001.  I finally feel like part of the group. lol

[Shale]

http://www.obitalk.com/forum/index.php?topic=5467.0 is my attempt at a summary of the solutions that have been provided by the various contributors.