Firewall: iptables - Revision history

Bigfoot65: /* Edit the firewall to allow core services */

2020-06-23T01:55:14Z

Edit the firewall to allow core services

Bigfoot65: /* Modify iptables state */

2020-06-23T01:52:32Z

Modify iptables state

Bigfoot65: /* Edit the firewall to allow core services */

2020-06-23T01:51:32Z

Edit the firewall to allow core services

Cpg at 00:19, 13 July 2012

2012-07-13T00:19:48Z

Sag47: Created page with "{{MessageBox| backgroundcolor = red| image =Warning.png| heading =WARNING| message = This is recommended only for advanced users, proceed with caution.}} = iptables tutorial = I..."

2011-07-26T05:45:00Z

Created page with "{{MessageBox| backgroundcolor = red| image =Warning.png| heading =WARNING| message = This is recommended only for advanced users, proceed with caution.}} = iptables tutorial = I..."

New page

{{MessageBox|
backgroundcolor = red|
image =Warning.png|
heading =WARNING|
message = This is recommended only for advanced users, proceed with caution.}}

= iptables tutorial =
If you're looking for a tutorial for how to use iptables there are better ones out there such as [http://www.linuxhomenetworking.com/wiki/index.php/Quick_HOWTO_:_Ch14_:_Linux_Firewalls_Using_iptables this one]. The purpose of this article is to provide Amahi users with a basic set of core rules in which they can enable the iptables firewall on their Amahi HDA without disrupting network services.

= Edit the firewall to allow core services =

You can edit your firewall rules by editing ''/etc/sysconfig/iptables'' or run the command ''system-config-firewall''.

First you need to understand what ports must be open in your HDA.
* 53 - DNS
* 67,68 - DHCP
* 80 - HTTP
* 139 - NetBIOS port for Samba
* 443 - HTTPS if you optionally [[Access_HDA_over_SSL]].
* 445 - Samba File Sharing (port for your network shares)
* 1194 - VPN
* 5353 - Multicast DNS

Here is the minimum iptables firewall rules required for your HDA to still function as an HDA. These rules do not include any extra services you have enabled such as SSH (port 22), VNC (port 5902), MiniDLNA (port 8200), etc. For extra apps and services you'll have to look up documentation on the App you're using.

{{Text|Text=
<pre><nowiki>*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
#multicast dns
-A INPUT -m state --state NEW -m udp -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT
#dns
-A INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 53 -j ACCEPT
#dhcp
-A INPUT -m state --state NEW -m tcp -p tcp --dport 67 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 67 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 68 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 68 -j ACCEPT
#netbios
-A INPUT -m state --state NEW -m tcp -p tcp --dport 139 -j ACCEPT
#Samba Share
-A INPUT -m state --state NEW -m tcp -p tcp --dport 445 -j ACCEPT
#hda web serving
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT
#VPN Server
-A INPUT -m state --state NEW -m udp -p udp --dport 1194 -j ACCEPT
-A INPUT -i tap0 -j ACCEPT
-A INPUT -i br0 -j ACCEPT
-A FORWARD -i br0 -j ACCEPT

-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT</nowiki></pre>
}}

= Modify iptables state =
Start the firewall.
{{Code|service iptables start}}
Stop the firewall.
{{Code|service iptables stop}}
Show the current rules.
{{Code|service iptables status}}
Service command usage.
{{Text|Text=Usage: <nowiki>iptables {start|stop|restart|condrestart|status|panic|save}</nowiki>}}

= List of ports needed for current Amahi Apps =
TO BE UPDATED!

@@ Line 17: / Line 17: @@
 * 80 - HTTP
 * 139 - NetBIOS port for Samba
-* 443 - HTTPS if you optionally [[Access_HDA_over_SSL]].
+* 443 - HTTPS if you optionally [[Access HDA over SSL]].
 * 445 - Samba File Sharing (port for your network shares)
 * 1194 - VPN

@@ Line 59: / Line 59: @@
 = Modify iptables state =
 Start the firewall.
-{{Code|service iptables start}}
+ service iptables start
 Stop the firewall.
-{{Code|service iptables stop}}
+ service iptables stop
 Show the current rules.
-{{Code|service iptables status}}
+ service iptables status
 Service command usage.
-{{Text|Text=Usage: <nowiki>iptables {start|stop|restart|condrestart|status|panic|save}</nowiki>}}
+ Usage: <nowiki>iptables {start|stop|restart|condrestart|status|panic|save}</nowiki>
 = List of ports needed for current Amahi Apps =
 TO BE UPDATED!

@@ Line 23: / Line 23: @@
 Here is the minimum iptables firewall rules required for your HDA to still function as an HDA.  These rules do not include any extra services you have enabled such as SSH (port 22), VNC (port 5902), MiniDLNA (port 8200), etc.  For extra apps and services you'll have to look up documentation on the App you're using.
+<pre style="white-space: pre-wrap; word-break: keep-all;"> <nowiki>*filter
 :INPUT ACCEPT [0:0]
 :FORWARD ACCEPT [0:0]
@@ Line 58: / Line 56: @@
 -A FORWARD -j REJECT --reject-with icmp-host-prohibited
 COMMIT</nowiki></pre>
 = Modify iptables state =

@@ Line 1: / Line 1: @@
 {{MessageBox|
-backgroundcolor	= red|
+backgroundcolor	= #faa|
 image	=Warning.png|
 heading	=WARNING|