Comcast Static IP Changed With New Modem?

Mon Feb 9 16:41:34 UTC 2015

Seen this happen quite often with Comcast.  They simply didn’t provision the new modem.  A simple call to them should correct it.  Done it two or 3 times in the past 6 months.

Justin

Justin Wilson j2sw at mtin.net
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Peering – Transit – Internet Exchange 

> On Feb 9, 2015, at 11:32 AM, Justin Krejci <JKrejci at 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
> 