What are the default iptables rules mean?
Issue
I use "system-config-securitylevel" or "setup" to setup the system firewall on RHEL. Even I don't enable any port, it will generate a set of rules by default. What are these rules mean?
Environment
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.