We have multiple RV345 across several of our locations. We also have one location that is using a RV325 router. The routers all have an site-to-site connection setup to a central server location. We have two domain controllers setup at the server location.
For the internal DNS resolving we want to use the split-dns feature within the site-to-site vpn settings. When we enable the split dns function it works fine for a couple of hours and then it randomly stops working and processing the DNS requests. The strange thing is that we also have a RV325 on one location with the same setup but on this router the split-dns function works fine for weeks. It we use the internal router diagnostic function to do a ping it will give the error:
Error: ping: bad address 'dc01.int.mydomain.com'
If we disable split-dns at the vpn settings and then enable it again, the internal ping function of the router works for a couple of times and then starts failing again with the same error. The only solution is to restart the router and then it will work again for a few hours.
As a workaround to make our internal windows network work we changed the DHCP of the LAN network so the primary DNS server is our internal one and the secondary is the router. If the VPN connection then drops people still have DNS through the secondary DNS server.
Is anyone else having this problem or does someone know a solution for this problem?
Thank you
