I have an ASUS RT-N16 router that I've flashed with the open-source DD-WRT firmware. According to my
ssh login, I'm running:
DD-WRT v24-sp2 mega (c) 2010 NewMedia-NET GmbH Release: 08/07/10 (SVN revision: 14896)
I'd like to be able to customize the iptables rules, but before I do that, I'd like to see the output of the built-in rules that get configured when manipulating the browser/GUI interface settings. I am aware of the firewall script tab in the browser interface for entering custom firewall rules, but I can't find someplace to see the output.
On a full-blown Linux system, the iptables rules would be stored somewhere like
/etc/sysconfig/iptables. Where would I find these on a DD-WRT filesystem? I can do
iptables -L -vn --line-numbers
and see them output, but what I'm looking for is more of what the
iptables-save command might output... so that I can incorporate the appropriate rules into my custom script.
I understand that this build does not have an
iptables-save command. I don't necessarily want the command itself, just output that it generates. If there was something like
/etc/sysconfig/iptables, I wouldn't care about having
iptables-save. I've seen that there may be different builds of DD-WRT that give something like
iptables-save, but I'm not at the point where I'm ready or willing to flash the router again. Maybe as a last resort.
The usual Linux locations for startup scripts and the like, (e.g.,
/etc/rc, ...) do not seem to have anything useful (at least in the build of DD-WRT that I have installed). For example, taking a look in
[/etc/init.d]# ll -rwxr-xr-x 1 root root 84 Aug 7 2010 rcS -rwxr-xr-x 1 root root 10 Aug 7 2010 S01dummy [/etc/init.d]# cat rcS #!/bin/sh for i in /etc/init.d/S*; do $i start 2>&1 done | logger -s -p 6 -t '' & [/etc/init.d]# cat S01dummy #!/bin/sh