NameResolution errors with B2 and Pihole for DNS

Hey gang, just wanted to drop a quick hint. On Feb 1st my duplicati backups started failing with
“Verifications”: [
{
“Key”: “duplicati-20210206T160857Z.dlist.zip.aes”,
“Value”: [
{
“Key”: “Error”,
“Value”: “Error: NameResolutionFailure”
}
]
Turns out one of the adblock lists in pihole (v.firebog.net/hosts/Prigent-Malware.txt) has flagged f001.backblazeb2.com as malware and blocks requests to it. You’ll be able to test connections to B2, but you won’t be able to upload files to it.
It took me a bit to figure out what was going on so I thought I would just drop a quick post in case anyone else is having trouble.
Just whitelist backblazeb2.com and you should be good to go again.

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Coincidentally, Backblaze B2 had DNS issues for everyone yesterday. I noticed a couple of my backup jobs failed with the same NameResolutionFailure for the B2 back end.