Comcast Static IP Changed With New Modem?

[Justin Krejci <JKrejci () usinternet com>]

Has anyone run into the situation where their static IP address from Comcast (on the business class cable modem 
Internet service) was changed when the modem was replaced?

We have a remote site that uses Comcast as a backup Internet connection and when we went to use it recently our VPN 
tunnel would not establish. After working with the Comcast support group we discovered Comcast changed our static IP 
address. I am working through trying to figure out the when and the why with Comcast still and suspect it was changed 
when the modem was replaced back in December. The modem was replaced by Comcast as our previous modem was apparently 
EOL'ed.

We're now setting up additional monitoring to verify the accessibility of our remote site via the Comcast connection so 
we don't have any future uh-ohs when we need to use our backup connection and it too is not fully functional.

TIA,
-Justin