Disable / Turn Off Firewall in Ubuntu Linux Server

 

How do I disable firewall in Ubuntu Linux server edition?

You can type the following command to see if firewall is active or not (open a terminal or ssh session and type the following command):

$ sudo iptables -L -n

 

Sample outputs:

Chain INPUT (policy ACCEPT)

target prot opt source destination

ACCEPT udp — 0.0.0.0/0 0.0.0.0/0 udp dpt:53

ACCEPT tcp — 0.0.0.0/0 0.0.0.0/0 tcp dpt:53

ACCEPT udp — 0.0.0.0/0 0.0.0.0/0 udp dpt:67

ACCEPT tcp — 0.0.0.0/0 0.0.0.0/0 tcp dpt:67

Chain FORWARD (policy ACCEPT)

target prot opt source destination

ACCEPT all — 0.0.0.0/0 192.168.122.0/24 state RELATED,ESTABLISHED

ACCEPT all — 192.168.122.0/24 0.0.0.0/0

ACCEPT all — 0.0.0.0/0 0.0.0.0/0

REJECT all — 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable

REJECT all — 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable

Chain OUTPUT (policy ACCEPT)

target prot opt source destination

You can save existing firewall rules as follows:

$ sudo iptables-save > firewall.rules

 

Finally, type the following commands to stop firewall:

$ sudo iptables -X

$ sudo iptables -t nat -F

$ sudo iptables -t nat -X

$ sudo iptables -t mangle -F

$ sudo iptables -t mangle -X

$ sudo iptables -P INPUT ACCEPT

$ sudo iptables -P FORWARD ACCEPT

$ sudo iptables -P OUTPUT ACCEPT

 

A Note About ufw

The latest version of Ubuntu comes with ufw (now it is the default firewall configuration tool for Ubuntu). It is developed to ease iptables firewall configuration, ufw provides a user friendly way to create an IPv4 or IPv6 host-based firewall. To disable ufw, enter:

$ sudo ufw disable

You can also use GUI tool to enable or disable Firewall under Ubuntu Linux desktop edition by visiting System > Administration > Firewall configuration option

Simply unselect “Enabled” option to turn off the firewall.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s