[Solved] OpenVPN client on LAN2 kills connection on LAN

Nope.

From LAN2 (192.168.1.3) I can't ping 192.168.1.1

DNS still the same thing, when VPN is up on LAN, LAN2 uses the same DNS.

However I only have this firewall rule... Maybe I need to add something else?

config forwarding
	option src 'lan'
	option dest 'lan2'

config forwarding
	option src 'lan2'
	option dest 'lan'

Also, in this other thread the guy had the exact same issue (VPN killed other VLAN, which we now have solved) and when he was trying to fix it, he had "DNS issues":