The other day I was checking my router when I came across these rather weird rules in the INPUT chain:
ACCEPT 0 -- 188.8.131.52 0.0.0.0/0 ACCEPT 0 -- 184.108.40.206 0.0.0.0/0
Since I didn’t add them, I was a bit surprised (and worried) that they are there. After a bit of searching, it looks like they were added at some point during DD-WRT’s development and will be removed in future versions.
Anyway, you can permanently remove those 2 rules by doing:
nvram set ral="" nvram commit reboot