Date: Fri, 3 Jul 1998 10:47:39 +0300 (EET DST) From: Oles Hnatkevych <gnut@cki.ipri.kiev.ua> To: freebsd-questions@FreeBSD.ORG Subject: IPFW on a gateway Message-ID: <Pine.BSF.3.95.980703102746.15769A-100000@cki.ipri.kiev.ua>
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Hi!
These are more general unix questions, but....
Great thanks in advance for answering several questions.
1. When ipfw processes packets?
a) when packet just arrived?
b) when packet arrived, passed through routing tables and is up
to be delivered to interface?
2. What means 'via interface'????? Does it mean 'from this interface'
or 'to this interface'?
3. I'm going to setup ipfw on a gateway. This PC has 6 interfaces.
How do I allow sendmail connections to this PC? With 6 'add'
commands with all ip addresses???? In routing tables for all
local addresses there's aroute like '<address> 127.0.0.1 lo0'
Can I just allow TCP connection to 127.0.0.1 instead of
N 'add' rules, where N is the number of local addresses?
(and 2 interfaces have even 2 aliases....)
4. Still not clear how to allow passing all packets destined
not to this PC. I'm not going to firewall anything behind,
just this PC.
Great thanks in advance for any hints and URL's.
Bye.
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