[SOLVED] Mysterious failover WAN DNS problem
Hi all, really enjoying pfSense!
I have two connections set up. The main WAN is normal DHCP from modem and WAN 2 is a PPoE connection to another modem. I've set up a gateway group and verified both connections are working by swapping round the tiers in the gateway group. pfSense uses whichever connection is Tier 1 and it works great.
The problem arises when the main WAN (Tier 1) goes down. pfSense uses the Tier 2 WAN2 connection as expected but there seems to be no DNS servers available to clients. I have specified DNS servers for the Tier 2 connection in the general configuration and have tried all combinations of "Allow DNS server list to be overridden by DHCP/PPP on WAN" and specifying DNS servers for both WANs.
It seems that the Tier 2 (WAN2) connection only uses its own DNS servers when WAN1 is up and as soon as it goes down WAN2's DNS stop working.
I'm stumped! Thanks in advance.
After much tinkering all it took was to "Enable Forwarding Mode" under DNS Query Forwarding in the DNS Resolver settings.