Connect via SSH and Secure the Server with iptables

in this page i am implementation how to make ssh connection to server where severer have stick rule of iptable

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Drop All Traffic by Default

These commands set the default policy for all chains to DROP, effectively blocking all incoming, outgoing, and forwarded packets:

Copysudo iptables -P INPUT DROP
sudo iptables -P OUTPUT DROP
sudo iptables -P FORWARD DROP

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Allow SSH Traffic

Make sure you don’t lock yourself out! Allow SSH (default port 22):

Copysudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT
sudo iptables -A OUTPUT -p tcp --sport 22 -j ACCEPT

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Connect using SSH
Open your terminal and run:

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to Block specific ip
If you want to block SSH access from another machine (e.g., 192.168.0.102), use:

Copysudo iptables -A INPUT -p tcp --dport 22 -s 192.168.0.102 -j DROP