'apt update' failure, me or repository?
I've been seeing 'apt update' failures since yesterday:
# apt update
Err:1 http://ftp.us.debian.org/debian stable InRelease
Connection failed [IP: 220.127.116.11 80]
Err:2 http://security.debian.org/debian-security buster/updates InRelease
Connection failed [IP: 18.104.22.168 80]
Err:3 http://ftp.debian.org/debian buster-backports InRelease
Connection failed [IP: 22.214.171.124 80]
Err:4 http://ftp.us.debian.org/debian buster-updates InRelease
Connection failed [IP: 126.96.36.199 80]
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://ftp.us.debian.org/debian/dists/stable/InRelease Connection failed [IP: 188.8.131.52 80]
W: Failed to fetch http://security.debian.org/debian-security/dists/buster/updates/InRelease Connection failed [IP: 184.108.40.206 80]
W: Failed to fetch http://ftp.us.debian.org/debian/dists/buster-updates/InRelease Connection failed [IP: 220.127.116.11 80]
W: Failed to fetch http://ftp.debian.org/debian/dists/buster-backports/InRelease Connection failed [IP: 18.104.22.168 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.
But from the same host:
# wget http://ftp.us.debian.org/debian/dists/stable/InRelease && head -10 InRelease
--2019-10-15 15:23:16-- http://ftp.us.debian.org/debian/dists/stable/InRelease
Resolving ftp.us.debian.org (ftp.us.debian.org)... 22.214.171.124, 126.96.36.199, 188.8.131.52, ...
Connecting to ftp.us.debian.org (ftp.us.debian.org)|184.108.40.206|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 121525 (119K)
Saving to: ‘InRelease’
InRelease 100%[===================>] 118.68K 690KB/s in 0.2s
2019-10-15 15:23:16 (690 KB/s) - ‘InRelease’ saved [121525/121525]
-----BEGIN PGP SIGNED MESSAGE-----
Date: Sat, 07 Sep 2019 09:51:20 UTC
To rule out the usual suspects:
1. There is no HTTP proxy involved, and none configured in
2. The versions of Debian involved are 8, 9, and 10.
3. There are multiple networks and DNS servers involved.
4. Emptying /var/lib/apt/lists/ changes nothing.
5. Changing the mirror to two of those suggested by netselect-apt
changes only the names/IP addresses in the error messages.
6. One of the hosts is a brand new machine, just built, and with
only an untwiddled base install of 10.1 for AMD64.
I'm stumped. Can anyone tell me if this is something that I can fix, and
how I might go about it?