Anyone know anything about TW cablemodems/DOCSIS 3?

General Help
1

Anyone know the DHCP IP address pool size a typical Time Warner cable modem might be subjected to?

If I’m on 50.50.25.1 (for example), and provided they don’t reconfigure their network or change hardware, can I expect all the IP address they assign me over several months to start with 50.50.25.? Or at least 50.50..*?

I’m thinking of adding something like 50.50.0.0/255.255.0.0 to my permit field for a remote extension. It won’t prevent my next door neighbor from hacking my phones, but it will block a large part of the world.

I don’t believe I can put a FQDN in the permit field, right? That would be awesome if I could (I have a dyndns domain I could stuff in there).

ANYWAY, thanks for any insight.

2

IP addresses are typically assigned in /18’s

What you are suggesting is a great stop gap measure. It vastly limits exposure.

On a related note, my company is located in Cleveland OH and we have a BGP peer with Time Warner. Our trunking is extremely high quality and we would be on net for you if you are East of the Mississippi.

Send me PM if you would like to chat.