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From: "Scott Miller" <srmiller@interbel.net>
To: netfilter@vger.kernel.org
Subject: Verify rules
Date: Thu, 26 Mar 2009 14:54:33 -0600	[thread overview]
Message-ID: <0d6001c9ae55$10b9e040$322da0c0$@net> (raw)
In-Reply-To: <49CBE955.7030507@gmail.com>

I was wondering if I could get someone to verify my rules.  What I am trying
to do to start with, is make only certain ports available on my outgoing
mail server - essentially blocking all other ports not listed.  I have the
below on my server in an inactive state because when I activate it, it locks
it completely down.

Could someone please take a look at my rules and share with me what I did
wrong?  Here is my entire config file:


-----------------------------

*mangle
:PREROUTING ACCEPT [6:948]
:INPUT ACCEPT [6:948]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [7:3269]
:POSTROUTING ACCEPT [7:3269]
COMMIT
*nat
:OUTPUT ACCEPT [0:0]
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
COMMIT
*filter
:FORWARD ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
# HTTP
-A INPUT -p tcp -m tcp -m state NEW,ESTABLISHED --dport 80 --state NEW -j
ACCEPT
# SSH
-A INPUT -p tcp -m tcp -m state NEW,ESTABLISHED --dport 22 --state NEW -j
ACCEPT
# DNS
-A INPUT -p tcp -m tcp -m state NEW,ESTABLISHED --dport 53 --state NEW -j
ACCEPT
# TIME
-A INPUT -p udp -m udp -m state NEW,ESTABLISHED --dport 123 --state NEW -j
ACCEPT
# WEBMIN
-A INPUT -p tcp -m tcp -m state NEW,ESTABLISHED --dport 10000 --state NEW -j
ACCEPT
# SMTP
-A INPUT -p tcp -m tcp -m state NEW,ESTABLISHED --dport 25 --state NEW -j
ACCEPT
# POP3
-A INPUT -p tcp -m tcp -m state NEW,ESTABLISHED --dport 110 --state NEW -j
ACCEPT
# IMAP
-A INPUT -p tcp -m tcp -m state NEW,ESTABLISHED --dport 993 --state NEW -j
ACCEPT
# RSYNC-TCP
-A INPUT -p tcp -m tcp -m state NEW,ESTABLISHED --dport 873 --state NEW -j
ACCEPT
# RSYNC-UDP
-A INPUT -p udp -m udp -m state NEW,ESTABLISHED --dport 873 --state NEW -j
ACCEPT
# DENY ALL OTHERS
-A INPUT -i eth0 -j REJECT --reject-with icmp-net-unreachable
COMMIT

--------------------------

Thanks,
Scott Miller


  reply	other threads:[~2009-03-26 20:54 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-26 18:24 Identifiying and modifying packets aragonx
2009-03-26 19:23 ` Kristian Evensen
2009-03-26 19:43   ` aragonx
2009-03-26 20:45     ` Kristian Evensen
2009-03-26 20:54       ` Scott Miller [this message]
2009-03-26 23:35         ` Verify rules Mike Wright
2009-03-27  8:05         ` Mart Frauenlob
2009-03-27 17:15           ` Scott Miller
2009-03-27 18:49             ` Mike Wright
2009-03-27 18:58               ` Mike Wright
2009-03-27 19:49                 ` Scott Miller
2009-03-27 19:55                   ` Mike Wright
2009-03-27 20:12                     ` Scott Miller
2009-03-27 22:49                       ` Mart Frauenlob
2009-03-27 19:56                   ` Mike Wright
2009-03-27 19:25               ` Rob Sterenborg

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