Note: Originally misclicked and created this thread way too early while starting to write it. Most of the content has been edited in. Apologies!
Running Merlin: 386.3_2
I have my network setup to use a pihole DNS filter. The Asus router advertises the pihole's local IP as a DNS server on DHCP and that works perfectly fine for all the devices within the network, except the router itself.
Anything within the router cannot resolve domains, this prevents things like OpenVPN clients, DDNS or even firmware update checks from working.
The way I have the DNS setup is (striken-through settings have been corrected based on suggestions from replies!):
LAN / DHCP Server / DNS and WINS Server Setting
Tried many combinations of these to no avail. That's what I expected the router's requests to rely on but that might be a terrible assumption.
Solution
If you are using dual WAN... make sure that you are editing the WAN DNS settings for the right WAN. /facepalm
Running Merlin: 386.3_2
I have my network setup to use a pihole DNS filter. The Asus router advertises the pihole's local IP as a DNS server on DHCP and that works perfectly fine for all the devices within the network, except the router itself.
Anything within the router cannot resolve domains, this prevents things like OpenVPN clients, DDNS or even firmware update checks from working.
The way I have the DNS setup is (striken-through settings have been corrected based on suggestions from replies!):
LAN / DHCP Server / DNS and WINS Server Setting
- DNS Server 1: pihole's local ip
- DNS Server 2: pihole's local ip
- Advertise router's IP in addition to user-specified DNS: No
- WINS Server: (blank)
- Enable DNS-based Filtering: On
- Global Filter Mode: Router
- Custom (user-defined) DNS 1: (blank)
- Custom (user-defined) DNS 2: (blank)
- Custom (user-defined) DNS 3: (blank)
- Client List:
- pihole's MAC (No filter)
Tried many combinations of these to no avail. That's what I expected the router's requests to rely on but that might be a terrible assumption.
- Connect to DNS Server automatically: No
- DNS Server1: 1.1.1.1 (Cloudflare)
- DNS Server2:
1.1.1.21.0.0.1 (Cloudflare) - Forward local domain queries to upstream DNS:
YesNo - Enable DNS Rebind protection: Yes
- Enable DNSSEC support: Yes
- Validate unsigned DNSSEC replies: Yes
- Prevent client auto DoH: Auto
- DNS Privacy Protocol: None
Code:
May 6 10:17:00 ovpn-client1[3043]: RESOLVE: Cannot resolve host address: <myvpnserverdomain : port> (Name or service not known)
Solution
If you are using dual WAN... make sure that you are editing the WAN DNS settings for the right WAN. /facepalm
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