And I have to install package iptables-mod-extra and I try again with following command, iptables -t mangle -I POSTROUTING 1 -j TTL --ttl-set 65 and sudden the router hang and not resposive.
Even I try re-plug the power to restart the router and somehow it just crash and I’ve to manually RESET the router.
I’m not sure if this is a bug of the firmware or that your build is using nftables
on the OpenWrt forums i see people talk about package iptables-mod-ipopt, this could also be part of package iptables-mod-extra.
But there is also a nftables command, though if your iptables command worked before its strange it would result in a softbrick.
One thing i also would think of is setting a outgoing interface in the iptables rule i believe -o does that, i think that alone gives more abstraction over the interface the ttl gets applied to, than having a probability the ttl gets applied to other interfaces (reminds me of the default gateway checkbox in luci).
As for now the only thing i can recommend is following the debricking guide:
Update Just now I flash Dec 23, 2023 snapshot firmware and redo the command and it just work out of the box.
No idea ~
❯ ssh root@192.168.8.1
Warning: Permanently added '192.168.8.1' (ED25519) to the list of known hosts.
root@192.168.8.1's password:
BusyBox v1.33.2 (2023-12-22 21:08:11 UTC) built-in shell (ash)
_______ ________ __ ______ __
| |.-----.-----.-----.| | | |__| ___|__|
| - || _ | -__| || | | | | ___| |
|_______|| __|_____|__|__||________|__|__| |__|
|__| W I R E L E S S F R E E D O M
---------------------------------------------------
ApNos-989cf5c3-devel
OpenWrt 21.02-SNAPSHOT, r16399+165-c67509efd7
---------------------------------------------------
root@GL-AXT1800:~# iptables -t mangle -I POSTROUTING -j TTL --ttl-set 65
root@GL-AXT1800:~# ip6tables -t mangle -I POSTROUTING -j HL --hl-set 65
Note:
I remember I installed package iptables-mod-ipopt and iptables-mod-extra then RESET the router, then upgrade the firmware to Dec, 23 snapshot then it just works. ~
