DNS does not work if "default" interface is down
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I have 3 WANs configured:
They are all load balancing
Unfortunately, once "default" interface is dowm, DNS doesn't work anymore. I can still access sites by IP, but DNS is not available.
This is probably because of DNS forwarder, which is resolving DNS only via default interface.
How to fix this?
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use the resolver and have it use 1 or all of the interfaces you would like it to be able to use..
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If you are using the forwarder, or the resolver in forwarding mode, go to System > General Setup, and setup one DNS server for each WAN. So the first DNS server would use the gateway for the first WAN, second with a gateway for the second WAN, and so on.
If you are using the resolver in non-forwarding mode, then activate default gateway switching from System > Advanced, Misc.
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How can I set DNS for each WAN? It should be set by DHCP. I just don't know which DNS is for which WAN!
Of course, I know 8.8.8.8 and 8.8.4.4, but these are only 2, while I need 3.
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I'm using the forwarder and have mine set up this way (I also have IPv6 set up) and was having the same problem until I added the last 2 entries.
Under System/General Setup on the DNS server settings I have 6 entries.2001:4860:4860::8888 WAN_DHCP6 (google IPv6)
2001:4860:4860::8844 WAN_DHCP6 (google IPv6)
208.67.222.222 WAN1_DHCP (openDNS)
208.67.220.220 WAN1_DHCP (openDNS)
8.8.8.8 WAN2_DHCP (Google)
8.8.4.4 WAN2_DHCP (Google)If I failover to WAN2 it will use those two google DNS servers, if I am running normally, it uses openDNS.
Note, I don't know if I can have duplicate DNS server IPs with different interfaces. I've never tried.
