Tagged: firewall


Modern Protocol Problems with an Old Firewall

Legacy systems are part of any mature technical environment. While I was a combination of both impressed and shocked when recently presented with a SunOS 5.7 box (OS dated 1998!) I had to assist...


SIP-ing Through the Firewall

Here’s an odd puzzle for you. Fire up a SIP soft-phone and connect it to an external provider. Dial a number and you can make a call successfully. Doesn’t sound particularly unusual. Now fire...