If you’re using sip to connect to callwithus then you need to make sure that you’re using the generic address sip.callwithus.com as your proxy/registrar.

From May 1st the other, more specific addresses, that used to work will stop accepting registrations (west.callwithus.com, east.callwithus.com, uk.callwithus.com)

See here for further details – http://www.callwithus.com/configuration

I spent a little while playing with sipvicious today. This is a SIP scanner that can be used for scanning SIP servers – which obviousy includes Asterisk, Trixbox, Elastix, etc…

It’s not surpising that scanning for vulnerable SIP servers is on the increase – these sort of tools are really easy to use, and with the lure of making free phone calls at your expense it’s definitnely worth making sure that your PBX is secure.

Here’s what I did to scan one of my servers. The server is a Trixbox CE 2.6 server and I set up the following extensions for testing -

Continue reading ‘Hacking and securing your Asterisk server’ »

Our Asterisk Only VPS template has been updated to run Asterisk 1.6 and CentOS 5.3.

This VPS comes with the Dahdi dummy driver compiled meaning you can run IAX2 trunks and Conferences if required.

For more details on all Sysadminman VOIP VPS plans click here