Guys, I can not stress this enough:
FOR THE LOVE OF ALL THAT IS HOLY, MAKE YOUR SIP EXTENSION PASSWORDS, STRONG! THERE IS A RASH OF SIP_VICIOUS RUNS HAPPENING WITH PHONE SPAMMERS LOOKING FOR FREE EXTENSIONS!
IF YOU PUT A PASSWORD like '12345' ON ONE OF YOUR SIP EXTENSIONS, IT'S YOUR OWN FUCKING FAULT, FOR WHAT HAPPENS! FIX IT!
EVEN BETTER? FIREWALL OFF PORT 5060, IF YOUR REGISTRAR CAN HANDLE REGISTRATIONS WITHOUT REQUIRING THE PORT TO BE OPEN!
-Thom