IPTables rules for SSH

To enable access to the SSH server in IPTables, you must add a rule:

sudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT

To open only a particular network, for example 192.168.0.0/24:

sudo iptables -A INPUT -s 192.168.0.0/24 -p tcp --dport 22 -j ACCEPT

You can also restrict access by the IP configuration of the SSH itself.

To remove a rule, we’ll specify the same command, replacing -A with -D, for example:

sudo iptables -D INPUT -p tcp --dport 22 -j ACCEPT

To view the list of rules, use the command:

sudo iptables -nvL

See also:
Installing and Configuring SSH
Configuring IPTables

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