VNC Client - Server, Unable to connect to remote server

Question

I have a remote Linux server, I was trying to connect to it using TigerVNC, I can sucessfully connect to my remote server, when the server iptable is not running, but after I start running iptables, I am unable to connect to remote server using VNC

Error : "The connection was refused by the host computer"

Connecting as IP_ADDRESS::5901

Do I need to add entry in iptables to all all to connect to VNC server, or any suggestions?

Thanks

Answer 1

For VNC, you need to modify your rules as follows

for i in 0 1 2 3
do
  iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 580$i  -j ACCEPT
  iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 590$i  -j ACCEPT
  iptables -A INPUT -m state --state NEW -m tcp -p tcp --dport 600$i  -j ACCEPT
done

This is for 4 VNC connections. If you need more or less, you need to adjust the number of times the loop should run.