Dynamic dhcp updates going over WAN instead of vpn

[Jrp 0]

I am using pfsense as a DNS forwarder to send queries across a site to site VPN for resolving.

This works fine for clients.

I have implemented dynamic DNS updates from the client dhcp requests.

These updates go out the WAN port using the public ip as the source.

I need these updates to be sent over the site to site VPN to our internal DNS server.

How can I route this traffic over the VPN?

[Jrp 0]

Moved to general