Hello Friends,

Following are the commands to open tcp or udp ports on the server.

Before using commands for opening the port please make sure the specific port is already opend and what is the use of that port.

you can verify the port with

netstat -nap | grep : <port no>

1.you can open TCp port with

iptables -A INPUT  -p tcp –dport <port no> -j ACCEPT

2. You can open UDP port with

iptables -A INPUT -p udp –sport <port no>  -j ACCEPT

after that

3 service iptables save

and for flushhing iptables us

iptables -F

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