Just Plain Bitter
Somewhere along the way Comcast decided to give away Netgear WRN1000 routers away to their customers over the last few weeks. My customers all of a sudden decided to install them this week and kill their VoIP service with us because the router has an SPI firewall enabled by default. This blocks the private IP from our servers in the registration packet so we don't no where to send the authorization ACK. We get this flood of tickets that say all outbound calls are dropping after 20s! Anyone know what a bunch of cockroaches look like when you turn on the lights? That's what network engineers look like when we think we have a large problem! After calling a couple of customers and finding a pattern and put the pieces together it calmed down around here but it was intense for a little while while checked all sorts of crap to see what would cause this to happen. So in closing, I HATE YOU COMCAST!