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How to disable firewall or IP tables on Ubuntu Linux server

Login on the console with a sudo user

 

Approach 1: Simple

To List UFW (default firewall on Ubuntu) run the following command

$ sudo ufw status verbose

 

Sample output

Status: active

Logging: on (low)

Default: deny (incoming), allow (outgoing), deny (routed)

New profiles: skip

 

To                         Action      From

—                         ——      —-

66.61.246.79 80/tcp        ALLOW IN    Anywhere

66.61.246.78 80/tcp        ALLOW IN    Anywhere

 

 

To disable UFW firewall run the following command

 

$ sudo ufw disable

 

 

Old school Approach

 

Alternatively, run the following command to list any existing firewall rules

 

$ sudo iptables -L –n

 

 

Sample output

 

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            172.148.102.0/24     state RELATED,ESTABLISHED

ACCEPT     all  —  172.148.102.0/24     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

 

 

 

 

 

To stop and Flush all the rules run the following commands

 

$ 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

 

 

 

 

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