On Fri, Feb 10, 2012 at 11:00 AM, Jason T. Slack-Moehrle
<[email protected]> wrote:
> I am a little confused at how I would know if they are handing me a /29 or 
> just 5 IP's?
>
> range: 75.xx.xx.25 - .29
> subnet: 255.255.255.248 (which is /29, IIRC)
> GW: 75.xx.xx.30

Comcast has routed that /29 to your cable modem, and made those IPs
visible to you on the inside.  They are not routing the /29 to your
pfSense box, else the fpSense box would have to have its own very own
IP address outside of that /29, and that'd be a total waste of address
space the IP for your firewall would need to be a /29 to route them to
you anyway (at least if you had any redundancy, such as a CARPed pair
of firewalls.)
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