03-26-2013
iptables Rules for my network
Hi Champs
i am new in Iptables and trying to write rules for my Samba server.I took some help from internet, created one script and run from rc.local :
#Allow loopback
iptables -I INPUT -i lo -j ACCEPT
# Accept packets from Trusted network
iptables -A INPUT -s my-network/subnet -j ACCEPT
# to allow established session to received traffic
iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
# to allow SSH on port 22 from my network
iptables -A INPUT -i eth0 -p tcp -s my-network/subnet --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT
# To Allow incoming traffice on default SAMBA PORTS
iptables -A INPUT -p udp --dport 137 -j ACCEPT
iptables -A INPUT -p udp --dport 138 -j ACCEPT
iptables -A INPUT -p udp --dport 139 -j ACCEPT
iptables -A INPUT -p tcp --dport 139 -j ACCEPT
iptables -A INPUT -p tcp --dport 445 -j ACCEPT
#Enable Logging
iptables -A INPUT -j LOG
iptables -A INPUT -m limit --limit 2/min -j LOG --log-prefix "Iptables packet Drop" --log-level 7
# Drop all other Packets
iptables -A INPUT -j DROP
I also created one separate log file for iptables in /var/log/iptables.log and edit /etc/syslog.conf :
*.info;kern!=warning;mail.none;news.none;authpriv.none;cron.none /var/log/message
# Add new location
kern.warning /var/log/iptables.log
But my Drop packets are not showing in iptables.log file.Please let me know if i am doing wrong and let me know the correct way to write.I only want samba communication and SSH nothing else.
Thank You
Vaibhav
Last edited by Vaibhav.T; 03-26-2013 at 08:06 PM..
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LEARN ABOUT MOJAVE
iptables-apply
IPTABLES-APPLY(8) iptables 1.6.1 IPTABLES-APPLY(8)
NAME
iptables-apply - a safer way to update iptables remotely
SYNOPSIS
iptables-apply [-hV] [-t timeout] [-w savefile] {[rulesfile]|-c [runcmd]}
DESCRIPTION
iptables-apply will try to apply a new rulesfile (as output by iptables-save, read by iptables-restore) or run a command to configure
iptables and then prompt the user whether the changes are okay. If the new iptables rules cut the existing connection, the user will not be
able to answer affirmatively. In this case, the script rolls back to the previous working iptables rules after the timeout expires.
Successfully applied rules can also be written to savefile and later used to roll back to this state. This can be used to implement a store
last good configuration mechanism when experimenting with an iptables setup script: iptables-apply -w /etc/network/iptables.up.rules -c
/etc/network/iptables.up.run
When called as ip6tables-apply, the script will use ip6tables-save/-restore and IPv6 default values instead. Default value for rulesfile is
'/etc/network/iptables.up.rules'.
OPTIONS
-t seconds, --timeout seconds
Sets the timeout in seconds after which the script will roll back to the previous ruleset (default: 10).
-w savefile, --write savefile
Specify the savefile where successfully applied rules will be written to (default if empty string is given:
/etc/network/iptables.up.rules).
-c runcmd, --command runcmd
Run command runcmd to configure iptables instead of applying a rulesfile (default: /etc/network/iptables.up.run).
-h, --help
Display usage information.
-V, --version
Display version information.
SEE ALSO
iptables-restore(8), iptables-save(8), iptables(8).
LEGALESE
Original iptables-apply - Copyright 2006 Martin F. Krafft <madduck@madduck.net>. Version 1.1 - Copyright 2010 GW <gw.2010@tnode.com or
http://gw.tnode.com/>.
This manual page was written by Martin F. Krafft <madduck@madduck.net> and extended by GW <gw.2010@tnode.com or http://gw.tnode.com/>.
Permission is granted to copy, distribute and/or modify this document under the terms of the Artistic License 2.0.
iptables 1.6.1 IPTABLES-APPLY(8)