I'd like to increment the TTL of routed packets going out of a tethered device so that the packets appear to originate from the router (even TTL) not the device they came from.
I've tried the following i-tables command but it is not working.
root@OpenWrt:/# iptables -t mangle -I PREROUTING -i eth2 -j TTL --ttl-inc 1
iptables v1.8.3 (legacy): unknown option "--ttl-inc"
Try `iptables -h' or 'iptables --help' for more information.
Any ideas how I can do this?
TIA