Hello,
Apologies for a late reply.
Please, try enabling masquerading in Network → Firewall for LAN => OpenVPN zone.
If the issue persists, could you check if the router receives pings on the tunnel interface when you ping the LAN devices?
Access the RUT via CLI/SSH (username ‘root’) , install tcpdump and run it on the tunnel interface:
# install tcpdump
opkg update
opkg install tcpdump
# check the name of the tunnel interface
ifconfig
# run tcp dump on that interface (replace tun_clntvp with your interface)
tcpdump -i tun_clntvp icmp
Do you see ICMP packets going into LAN when you ping the device in LAN from the OpenVPN tunnel? Please, share the output.
Kind Regards,