TCP/IP

Got a Billion BiPAC 7404VGP? Can’t access a website?

Brendan King No Comments 768 Views

We couldn’t get to google maps today. We recently adjusted the firewall seetings in our BiPAC 7404VGP but didn’t make any changes that should have affected google maps. Looking at Status / Event Log showed me that an address with a Source Port of 80 was being blocked by a blacklist. By going into the.

TCP/IP Ports – Understanding Source and Destination

Brendan King No Comments 816 Views

Imagine there is a big wall of “pigeon holes” between your computer and the internet. Each pigeon hole is numbered and each hole has specific purpose. For example, we only accept new SMTP mail in pigeon hole number 25. We only accept WWW requests in pigeon hole number 80. We call these pigeon holes, “ports”..