Problems resolving DNS names all day. DNS attack?

[#1 · Accepted solution]

Did a "return to factory settings" on my router and it solved the issue.

Don't ask me why it worked, I haven't changed any settings recently, and unplugging it didn't work!

2 of the websites that I couldn't ping before, now work, so something weird was going on.

C:\Users\user>ping www.google.com

Pinging www.google.com [212.56.71.20] with 32 bytes of data:
Reply from 212.56.71.20: bytes=32 time=18ms TTL=60
Reply from 212.56.71.20: bytes=32 time=16ms TTL=60
Reply from 212.56.71.20: bytes=32 time=16ms TTL=60
Reply from 212.56.71.20: bytes=32 time=18ms TTL=60

Ping statistics for 212.56.71.20:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 16ms, Maximum = 18ms, Average = 17ms

C:\Users\user>ping www.thisismoney.co.uk

Pinging a113.g.akamai.net [212.56.73.34] with 32 bytes of data:
Reply from 212.56.73.34: bytes=32 time=20ms TTL=60
Reply from 212.56.73.34: bytes=32 time=17ms TTL=60
Reply from 212.56.73.34: bytes=32 time=19ms TTL=60
Reply from 212.56.73.34: bytes=32 time=15ms TTL=60

Ping statistics for 212.56.73.34:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 15ms, Maximum = 20ms, Average = 17ms

[#2]

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@Doglet wrote:

Which router do you have? I'm using the Plusnet Hub One, which seems hard wired for Plusnet DNS only 😕

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Other routers are available

[#3]

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Glad you've fixed the problem.

@Doglet wrote:

 Some web sites works, some are slow, other don't work at all, yet the router is reporting 20down/19up which is the speed it's always been.

With that upstream speed I would have expected a faster downstream. Is it still around that speed after the fix?

[#4]

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@npr wrote:

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With that downstream speed I would have expected a faster upstream. Is it still around that speed after the fix?

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Faster than 19Mb/s? I don't think that's possible even on a full 20Mb/s upstream sync. My downstream is 65Mb/s and I've never seen better than 18.7Mb/s on the upstream. I'm surprised that poster gets 19Mb/s up when they only have 20Mb/s down.

[#5]

Thanks, now corrected my mistake.