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David Pinn
Asked: 2010-03-05 19:29:28 +0800 CST

Configuring my Linux firewall for Tomcat

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I'm following some instructions for Installing Tomcat. They require me to add the following line to my iptables file:

-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 8080 --syn -j ACCEPT

Having carefully read the man page for iptables, I have learned what the parameters do, except for the first one.

What does -A RH-Lokkit-0-50-INPUT do, and can you confirm that it is sensible in this case?

firewall tomcat linux iptables

1 Answers

  1. Best Answer

    The -A RH-Lokkit-0-50-INPUT is adding it to the chain named RH-Lokkit-0-50-INPUT. Unless that chain exists, I would not use it.

    You can see your existing rules with:

    iptables -L -n

    If you do not have the chain, you can simply use the following in its place:

    iptables -A INPUT -p tcp -m tcp --dport 8080 --syn -j ACCEPT

    If you do not have firewall rules setup in the first place, this rule is superfluous.

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