Example webserver nfs keyserver iptable ruleset - Revision history

Gordp at 20:46, 18 December 2012

2012-12-18T20:46:58Z

← Older revision		Revision as of 20:46, 18 December 2012
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	# and addressed to this host.)		# and addressed to this host.)

	$IPTABLES -A INPUT -m ~~state~~ --~~state~~ INVALID -j DROP		$IPTABLES -A INPUT -m conntrack --ctstate INVALID -j DROP
	$IPTABLES -A INPUT -m ~~state~~ --~~state~~ RELATED,ESTABLISHED -j ACCEPT		$IPTABLES -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT

	# ftp incoming		# ftp incoming
	#$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 20 -j ACCEPT		#$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 20 -j ACCEPT
	#$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 21 -j ACCEPT		#$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 21 -j ACCEPT

	# ssh incoming, including non-standard port (if needed)		# ssh incoming, including non-standard port (if needed)
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 22 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 22 -j ACCEPT
	#$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 222 -j ACCEPT		#$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 222 -j ACCEPT

	# this machine is a mail-server, aggregating logs + hosting mailing-lists		# this machine is a mail-server, aggregating logs + hosting mailing-lists
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 25 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 25 -j ACCEPT

	# web serving, let's allow it! Both http and https ports		# web serving, let's allow it! Both http and https ports
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 80 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 80 -j ACCEPT
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 443 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 443 -j ACCEPT

	# portmapper, in support of NFS-client		# portmapper, in support of NFS-client
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 111 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 111 -j ACCEPT
	$IPTABLES -A INPUT -p udp -m ~~state~~ --~~state~~ NEW --dport 111 -j ACCEPT		$IPTABLES -A INPUT -p udp -m conntrack --ctstate NEW --dport 111 -j ACCEPT

	# nagios (5666); monitor time (123), allow snmp (161)		# nagios (5666); monitor time (123), allow snmp (161)
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 5666 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 5666 -j ACCEPT
	$IPTABLES -A INPUT -p udp -m udp --dport 123 -j ACCEPT		$IPTABLES -A INPUT -p udp -m udp --dport 123 -j ACCEPT
	$IPTABLES -A INPUT -p udp -m udp --dport 161 -j ACCEPT		$IPTABLES -A INPUT -p udp -m udp --dport 161 -j ACCEPT

	# amanda tape-backups; we reach out and tape things from this machine		# amanda tape-backups; we reach out and tape things from this machine
	$IPTABLES -A INPUT -p udp -m ~~state~~ --~~state~~ NEW -m udp --dport 10080 -j ACCEPT		$IPTABLES -A INPUT -p udp -m conntrack --ctstate NEW -m udp --dport 10080 -j ACCEPT
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 10082 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 10082 -j ACCEPT
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 10083 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 10083 -j ACCEPT

	# flexlm (lmgrd) license-server listens here (set in license.dat file)		# flexlm (lmgrd) license-server listens here (set in license.dat file)
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 7111 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 7111 -j ACCEPT
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 7112 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 7112 -j ACCEPT

	# Sassafrass keyserver listens here on both udp and tcp		# Sassafrass keyserver listens here on both udp and tcp
	$IPTABLES -A INPUT -p tcp -m ~~state~~ --~~state~~ NEW --dport 19283 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m conntrack --ctstate NEW --dport 19283 -j ACCEPT
	$IPTABLES -A INPUT -p udp -m udp --dport 19283 -j ACCEPT		$IPTABLES -A INPUT -p udp -m udp --dport 19283 -j ACCEPT

Gordp at 20:58, 28 December 2008

2008-12-28T20:58:48Z

← Older revision		Revision as of 20:58, 28 December 2008
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	# of course, accepting loopback is a good idea		# of course, accepting loopback is a good idea
	$IPTABLES -A INPUT -i lo -j ACCEPT		$IPTABLES -A INPUT -i lo -j ACCEPT

			# we will permit ping, but rate-limit type 8 to prevent DoS-attack
			$IPTABLES -A INPUT -p icmp --icmp-type 0 -j ACCEPT
			$IPTABLES -A INPUT -p icmp --icmp-type 3 -j ACCEPT
			$IPTABLES -A INPUT -p icmp --icmp-type 11 -j ACCEPT
			$IPTABLES -A INPUT -p icmp --icmp-type 8 -m limit --limit 1/second -j ACCEPT

	# (Applies to packets entering our network interface from the network,		# (Applies to packets entering our network interface from the network,

Gordp at 16:22, 10 March 2008

2008-03-10T16:22:01Z

← Older revision		Revision as of 16:22, 10 March 2008
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	# portmapper, in support of NFS-client		# portmapper, in support of NFS-client
	$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 111 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 111 -j ACCEPT
			$IPTABLES -A INPUT -p udp -m state --state NEW --dport 111 -j ACCEPT

	# nagios (5666); monitor time (123), allow snmp (161)		# nagios (5666); monitor time (123), allow snmp (161)

Hha13 at 23:38, 6 March 2008

2008-03-06T23:38:44Z

← Older revision		Revision as of 23:38, 6 March 2008
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	# flexlm (lmgrd) license-server listens here (set in license.dat file)		# flexlm (lmgrd) license-server listens here (set in license.dat file)
	$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 7111 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 7111 -j ACCEPT
			$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 7112 -j ACCEPT

	# Sassafrass keyserver listens here on both udp and tcp		# Sassafrass keyserver listens here on both udp and tcp

Gordp at 16:43, 4 February 2008

2008-02-04T16:43:22Z

← Older revision		Revision as of 16:43, 4 February 2008
Line 50:		Line 50:

	# amanda tape-backups; we reach out and tape things from this machine		# amanda tape-backups; we reach out and tape things from this machine
	$IPTABLES -A INPUT -p udp -m udp --dport 10080 -j ACCEPT		$IPTABLES -A INPUT -p udp -m state --state NEW -m udp --dport 10080 -j ACCEPT
	$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10082 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10082 -j ACCEPT
	$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10083 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10083 -j ACCEPT

Gordp at 18:16, 30 January 2008

2008-01-30T18:16:31Z

← Older revision		Revision as of 18:16, 30 January 2008
Line 46:		Line 46:
	# nagios (5666); monitor time (123), allow snmp (161)		# nagios (5666); monitor time (123), allow snmp (161)
	$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 5666 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 5666 -j ACCEPT
	$IPTABLES -A INPUT -p udp -m ~~state --state NEW~~ --dport 123 -j ACCEPT		$IPTABLES -A INPUT -p udp -m udp --dport 123 -j ACCEPT
	$IPTABLES -A INPUT -p udp -m ~~state --state NEW~~ --dport 161 -j ACCEPT		$IPTABLES -A INPUT -p udp -m udp --dport 161 -j ACCEPT

	# amanda tape-backups; we reach out and tape things from this machine		# amanda tape-backups; we reach out and tape things from this machine
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	# Sassafrass keyserver listens here on both udp and tcp		# Sassafrass keyserver listens here on both udp and tcp
	$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 19283 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 19283 -j ACCEPT
	$IPTABLES -A INPUT -p udp -m ~~state --state NEW~~ --dport 19283 -j ACCEPT		$IPTABLES -A INPUT -p udp -m udp --dport 19283 -j ACCEPT

Gordp at 18:10, 30 January 2008

2008-01-30T18:10:26Z

← Older revision		Revision as of 18:10, 30 January 2008
Line 50:		Line 50:

	# amanda tape-backups; we reach out and tape things from this machine		# amanda tape-backups; we reach out and tape things from this machine
	$IPTABLES -A INPUT -p udp -m ~~state --state NEW~~ --dport 10080 -j ACCEPT		$IPTABLES -A INPUT -p udp -m udp --dport 10080 -j ACCEPT
	$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10082 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10082 -j ACCEPT
	$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10083 -j ACCEPT		$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10083 -j ACCEPT
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	# (Applies to packets sent to the network interface from local processes)		# (Applies to packets sent to the network interface from local processes)

	$IPTABLES -A OUTPUT ~~-m state --state RELATED,ESTABLISHED~~ -j ACCEPT		$IPTABLES -A OUTPUT -j ACCEPT

	Invoke and make these rules effective:		Invoke and make these rules effective:

Gordp at 17:33, 30 January 2008

2008-01-30T17:33:24Z

← Older revision		Revision as of 17:33, 30 January 2008
Line 70:		Line 70:

	$IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT		$IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

			Invoke and make these rules effective:
			<font color=red>hostname</font> <font color=blue>~ #</font> '''sh /etc/iptables.bak'''

			Resulting active rules:

			<font color=red>hostname</font> <font color=blue>~ #</font> '''iptables -L'''

			REMEMBER! If you like the ruleset, and want it to be in-effect the next time you start iptables (ie after a reboot), then you '''must''':
			<font color=red>hostname</font> <font color=blue>~ #</font> '''rc-update add iptables default'''
			<font color=lime>*</font> iptables added to runlevel default

			<font color=red>hostname</font> <font color=blue>~ #</font> '''/etc/init.d/iptables save'''
			<font color=lime>*</font> Saving iptables state ...

Gordp at 16:36, 30 January 2008

2008-01-30T16:36:41Z

New page

#! /bin/sh
# /etc/iptables.bak

# Let's save typing & confusion with variables
IPTABLES=/sbin/iptables

# Flush active rules and custom tables
$IPTABLES --flush
$IPTABLES --delete-chain

# set the defaults so that by-default incoming packets are dropped, unless explicitly allowed;
# for a desktop workstation, we'll let lots of (unpredictable) outgoing packets go freely.
$IPTABLES -P INPUT DROP
$IPTABLES -P FORWARD DROP
$IPTABLES -P OUTPUT ACCEPT

# INBOUND POLICY
# ==============
# of course, accepting loopback is a good idea
$IPTABLES -A INPUT -i lo -j ACCEPT

# (Applies to packets entering our network interface from the network,
# and addressed to this host.)

$IPTABLES -A INPUT -m state --state INVALID -j DROP
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

# ftp incoming
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 20 -j ACCEPT
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 21 -j ACCEPT

# ssh incoming, including non-standard port (if needed)
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 22 -j ACCEPT
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 222 -j ACCEPT

# this machine is a mail-server, aggregating logs + hosting mailing-lists
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 25 -j ACCEPT

# web serving, let's allow it! Both http and https ports
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 80 -j ACCEPT
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 443 -j ACCEPT

# portmapper, in support of NFS-client
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 111 -j ACCEPT

# nagios (5666); monitor time (123), allow snmp (161)
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 5666 -j ACCEPT
$IPTABLES -A INPUT -p udp -m state --state NEW --dport 123 -j ACCEPT
$IPTABLES -A INPUT -p udp -m state --state NEW --dport 161 -j ACCEPT

# amanda tape-backups; we reach out and tape things from this machine
$IPTABLES -A INPUT -p udp -m state --state NEW --dport 10080 -j ACCEPT
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10082 -j ACCEPT
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 10083 -j ACCEPT

# flexlm (lmgrd) license-server listens here (set in license.dat file)
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 7111 -j ACCEPT

# Sassafrass keyserver listens here on both udp and tcp
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 19283 -j ACCEPT
$IPTABLES -A INPUT -p udp -m state --state NEW --dport 19283 -j ACCEPT

# OUTBOUND POLICY
# ===============
# of course, accepting loopback is a good idea
$IPTABLES -A OUTPUT -o lo -j ACCEPT

# (Applies to packets sent to the network interface from local processes)

$IPTABLES -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT