Is BT DNS down?

[Kimberlin]

Quad9 DNS @  9.9.9.9  is another DNS resolver that is worth a punt too. I use it all the time, no issues.

[CanardNoir]

This issue began yesterday afternoon and continues this morning. BT's DNS isn't reachable and since there is no way to modify the DNS address on the SH2 it has to be done individually on each device to something that works (eg 8.8.8.8). This includes PC, mobile phone, SkyQ, Alexa etc. Restarting the SH2 this morning does not make any difference (no reason why it should since the problem is within BT's infrastructure not mine).

There is no acknowledgment of the problem on BT's service status page (as usual) yet it continues (for about 16 hours so far). I wonder if anyone else knows any more about this issue.

Tracing route to 81.139.56.100 over a maximum of 30 hops

1 2 ms 1 ms 2 ms BTHUB6DX [192.168.1.254]
2 5 ms 5 ms 5 ms 172.16.17.240
3 * * * Request timed out.
4 119 ms 18 ms * 62.172.102.224
5 7 ms 6 ms 6 ms 62.172.102.155
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.

Trace complete.

[CanardNoir · Accepted solution]

Eventually managed to talk to someone at BT.

After asking me to clear my browser cache and disable the Windows 11 firewall (neither of which would have resolved a problem further down the IP stack, they told me to do a pinhole reset of the hub.

That seems to have sorted the problem.

[Kimberlin]

@CanardNoir  Not a practical solution for many and I entirely understand why most people wouldn’t want to spend money on something that an ISP supplies as part of a contract, but this is why I wont use an ISP router and why I choose my own DNS resolver.