Help with ipchains and IP addresses


Subject: Help with ipchains and IP addresses
From: Gawain Reifsnyder (gawain@guitar.net)
Date: Mon Feb 25 2002 - 15:58:05 MST


I'm pretty new to ipchains and firewalls and I'm not familiar with
the method ipchains uses to filter ip addresses... Here's an example
of a filtering rule I've successfully set up:

ipchains -A input -s 212.95.11.0/24 -p all -j DENY

As I understand it, this filters the range of 212.95.11.0 through
212.95.11.255.

Let's say I want to filter just the range of 212.95.11.36 to
212.95.11.152. How would I do this?

Or, as a second example, what about a range in the second octet, like
212.95.11.xxx through 212.95.18.xxx?

Thanks for your help!

Gawain



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