pfSense DHCP: Dynamic DNS Updates to a Windows DNS server over a Site-to-Site VPN.

Scenario:

Remote site running on pfSense SG-1000 (or other appliance) isn't updating DNS with hosts obtained via pfSense DHCP.

Site1:
  • AD/DNS/DHCP
  • pfSense firewall
  • Site to Site VPN connection to site2
Site2:
  • pfSense firewall appliance running DHCP
  • Site to Site VPN connection to site1
Prerequisites:
  • DHCP: Credentials for DNS
  • Forward and reverse lookup zones
  • Allow DNS secure/non-secure updates
DHCP > IPV4/6 > Properties
DNS > domain > properties


Solution:
On the pfSense box in Site2, enable DNS Dynamic Updates.

Services > DHCP Server > Dynamic DNS > Advanced Options

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