nanog mailing list archives

Re: Is it time to block all Microsoft protocols in the core?


From: "Rubens Kuhl Jr." <rkjnanog () ieg com br>
Date: Mon, 27 Jan 2003 11:40:49 -0200


| c) We buy Cisco 5200's in mass volume because they support our rural
| networks better than any other modem bank we've tried (welcome to Oklahoma
| :) and the processor on this wonderful piece of hardware will not support
| the overhead of using a per user access-list methodology to filter the
| majority and whitelist those who need the service.

Use different IP pools, one for regular users, one for whitelisted. Uplink
hop filters netbios, ms-sql, common trojan ports before they get to
customers based on destination IP being from regular pool.


Rubens



Current thread: