DNS server stopped working

Hi there,

I've been connected to opendns for a couple of years now and not made any changes but recently have noticed sites not being filtered. the Welcome to OpenDNS test page shows I am not connected, but my router's DNS settings are as above - 208.67.222.222 & ...220.220. I have a DrayTek Vigor 2860, screenshot here:

And here are a few cmd outputs I've been told may help in troubleshooting:

C:\Windows\System32>nslookup -type=txt debug.opendns.com. 208.67.220.220
Server: resolver2.opendns.com
Address: 208.67.220.220

Non-authoritative answer:
debug.opendns.com text =

"server m25.lon"
debug.opendns.com text =

"flags 20 0 8050 180000000000000000003950600FF40700814C3"
debug.opendns.com text =

"originid 35207373"
debug.opendns.com text =

"actype 2"
debug.opendns.com text =

"bundle 7778939"
debug.opendns.com text =

"source 176.35.81.244:62194"

C:\Windows\System32>nslookup -type=txt which.opendns.com.
DNS request timed out.
timeout was 2 seconds.
Server: UnKnown
Address: 38.134.121.95

DNS request timed out.
timeout was 2 seconds.
*** Request to UnKnown timed-out

C:\Windows\System32>nslookup whoami.akamai.net.
DNS request timed out.
timeout was 2 seconds.
Server: UnKnown
Address: 38.134.121.95

DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** Request to UnKnown timed-out

C:\Windows\System32>netsh interface ipv4 show config

Configuration for interface "Local Area Connection* 3"
    DHCP enabled:                         Yes
    InterfaceMetric:                      5
    DNS servers configured through DHCP: None
    Register with which suffix:           Primary only
    WINS servers configured through DHCP: None

Configuration for interface "Wi-Fi"
    DHCP enabled:                         Yes
    IP Address:                           192.168.1.19
    Subnet Prefix:                        192.168.1.0/24 (mask 255.255.255.0)
    Default Gateway:                      192.168.1.1
    Gateway Metric:                       0
    InterfaceMetric:                      30
    DNS servers configured through DHCP: 38.134.121.95
                                          8.8.8.8
    Register with which suffix:           Primary only
    WINS servers configured through DHCP: None

Configuration for interface "Ethernet"
    DHCP enabled:                         Yes
    InterfaceMetric:                      5
    DNS servers configured through DHCP: 192.168.16.3
    Register with which suffix:           Primary only
    WINS servers configured through DHCP: None

Configuration for interface "Loopback Pseudo-Interface 1"
    DHCP enabled:                         No
    IP Address:                           127.0.0.1
    Subnet Prefix:                        127.0.0.0/8 (mask 255.0.0.0)
    InterfaceMetric:                      50
    Statically Configured DNS Servers:    None
    Register with which suffix:           Primary only
    Statically Configured WINS Servers:   None

C:\Windows\System32>netsh interface ipv6 show dns

Configuration for interface "Local Area Connection* 3"
    DNS servers configured through DHCP: fec0:0:0:ffff::1%1
                                          fec0:0:0:ffff::2%1
                                          fec0:0:0:ffff::3%1
    Register with which suffix:           Primary only

Configuration for interface "Wi-Fi"
DNS servers configured through DHCP: None
Register with which suffix: Primary only

Configuration for interface "Ethernet"
DNS servers configured through DHCP: None
Register with which suffix: Primary only

Configuration for interface "Loopback Pseudo-Interface 1"
    Statically Configured DNS Servers:    fec0:0:0:ffff::1%1
                                          fec0:0:0:ffff::2%1
                                          fec0:0:0:ffff::3%1
    Register with which suffix:           Primary only

Configuration for interface "isatap.{31464DE1-AC9C-404F-B202-77E4A41D1B68}"
Statically Configured DNS Servers: None
Register with which suffix: None

Any ideas where it's going wrong?

rotblitz June 27, 2018 09:05 (Edited June 27, 2018 09:05)

This is the DNS configuration propagated by your router via DHCP and therefore effective on your computer:

DNS servers configured through DHCP: 38.134.121.95
8.8.8.8

The 38.134.121.95 DNS server address seems to belong to your ISP and may be invalid, because DNS queries are not being answered ("Request to UnKnown timed-out"). The 8.8.8.8 DNS server address belongs to Google Public DNS. Both are clearly neither OpenDNS addresses nor the router's IP address 192.168.1.1 which would be the prerequisite for using OpenDNS.

It looks like you configured these wrong addresses on the LAN side of your router. You should configure the OpenDNS addresses only on the WAN side, as you did according to the screen shot. Leave the LAN side's DNS server addresses untouched, i.e. undo what you may have done before, and remove these non-OpenDNS DNS server addresses from the LAN side configuration.

jonathan June 27, 2018 09:11

Thank you @rotblitz.

See below screenshot of the LAN side. It doesn't seem to be misconfigured...?

rotblitz June 27, 2018 13:44 (Edited June 27, 2018 13:46)

Sure, it is misconfigured, exactly as I said!

Remove this crap! Or configure your router's address 192.168.1.1 as DNS server address. Or configure the OpenDNS resolver addresses also here if you do not rely on local name resolution. I don't know your router, so I cannot know what it expects here and how it is supposed to work.

rotblitz June 27, 2018 13:55 (Edited June 27, 2018 14:02)

Here about these fields from your user manual:

It looks like the best option is to leave these fields empty. (Why did you fill them initially at all with non-OpenDNS addresses and then come to here to complain it not working? Weird... Does anybody else have unauthorized access to your router to perform such modifications? You should prevent others from doing this by selecting a strong router password.)

DNS server stopped working

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