From DD-WRT Wiki

Revision as of 08:17, 23 May 2005

You are here: Main Page/DD-WRT Docu (EN)/Telnet/SSH and the Command Line/Iptables command

This is an infant page. Clean it up and fill it with content!

I think we should have something about firewall builder on this page, since they're kind of related....

Basic Usage

iptables -[AD] chain rule-specification [options]
iptables -[RI] chain rulenum rule-specification [options]
iptables -D chain rulenum [options]
iptables -[LFZ] [chain] [options]
iptables -[NX] chain
iptables -E old-chain-name new-chain-name
iptables -P chain target [options]
iptables -h (print this help information)

Commands

--append  -A chain            Append to chain
--delete  -D chain            Delete matching rule from chain
--delete  -D chain rulenum
                              Delete rule rulenum (1 = first) from chain
--insert  -I chain [rulenum]
                              Insert in chain as rulenum (default 1=first)
--replace -R chain rulenum
                              Replace rule rulenum (1 = first) in chain
--list    -L [chain]          List the rules in a chain or all chains
--flush   -F [chain]          Delete all rules in  chain or all chains
--zero    -Z [chain]          Zero counters in chain or all chains
--new     -N chain            Create a new user-defined chain
--delete-chain
          -X [chain]          Delete a user-defined chain
--policy  -P chain target
                              Change policy on chain to target
--rename-chain
          -E old-chain new-chain
                              Change chain name, (moving any references)

Options

--proto       -p [!] proto    protocol: by number or name, eg. `tcp'
--source      -s [!] address[/mask]
                              source specification
--destination -d [!] address[/mask]
                              destination specification
--in-interface -i [!] input name[+]
                              network interface name ([+] for wildcard)
--jump        -j target
                              target for rule (may load target extension)
--match       -m match
                              extended match (may load extension)
--numeric     -n              numeric output of addresses and ports
--out-interface -o [!] output name[+]
                              network interface name ([+] for wildcard)
--table       -t table        table to manipulate (default: `filter')
--verbose     -v              verbose mode
--line-numbers                print line numbers when listing
--exact       -x              expand numbers (display exact values)
--fragment  -f                match second or further fragments only
--modprobe=<command>          try to insert modules using this command
--set-counters PKTS BYTES     set the counter during insert/append
--version   -V                print package version.

External Resources

http://www.iptables.org/documentation/HOWTO//netfilter-hacking-HOWTO.html

You are here: Main Page/DD-WRT Docu (EN)/Telnet/SSH and the Command Line/Iptables command