Yes, this is very common. You are lucky to even get a working static IP when they replace a modem. A lot of times they forget to assign one or assigned one that doesn't work. No, most of the time they won't tell you the IP changed.
Couple time I was told where my IP and default gateway wasn't in the same subnet. (example, static IP was x.x.x.4/30 and default gateway was x.x.x.3). Surprisingly, it didn't work. It took me 30 minutes each time to convince them that won't work. On Mon, Feb 9, 2015 at 11:32 AM, Justin Krejci <jkre...@usinternet.com> wrote: > 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 >
