user@debian-10:~$ sudo apt-get update 
Err:1 https://deb.debian.org/debian buster InRelease
  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
Err:2 https://deb.qubes-os.org/r4.1/vm buster InRelease                                    
  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
Err:3 https://deb.debian.org/debian-security buster/updates InRelease                      
  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
Reading package lists... Done                        
W: Failed to fetch https://deb.debian.org/debian/dists/buster/InRelease  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
W: Failed to fetch https://deb.debian.org/debian-security/dists/buster/updates/InRelease  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
W: Failed to fetch https://deb.qubes-os.org/r4.1/vm/dists/buster/InRelease  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
W: Some index files failed to download. They have been ignored, or old ones used instead.
user@debian-10:~$ sudo apt update
Err:1 https://deb.qubes-os.org/r4.1/vm buster InRelease
  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
Err:2 https://deb.debian.org/debian buster InRelease 
  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
Err:3 https://deb.debian.org/debian-security buster/updates InRelease
  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.
W: Failed to fetch https://deb.debian.org/debian/dists/buster/InRelease  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
W: Failed to fetch https://deb.debian.org/debian-security/dists/buster/updates/InRelease  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
W: Failed to fetch https://deb.qubes-os.org/r4.1/vm/dists/buster/InRelease  Reading from proxy failed - read (104: Connection reset by peer) [IP: 127.0.0.1 8082]
W: Some index files failed to download. They have been ignored, or old ones used instead.