root@OfflineMirrorTest:~# env | grep -i proxy
ALL_PROXY=http://192.168.1.38:3128
root@OfflineMirrorTest:~# dpkg -l | grep proxmox
ii proxmox-archive-keyring 4.0 all Proxmox APT archive keyring
ii proxmox-offline-mirror 0.7.2 amd64 Proxmox offline repository mirror and subscription key manager
ii proxmox-offline-mirror-docs 0.7.2 all Proxmox offline repository mirror and subscription key manager
root@OfflineMirrorTest:~# proxmox-offline-mirror mirror snapshot create debian-trixie-security
Fetching Release/Release.gpg files
-> GET 'http://deb.debian.org/debian-security/dists/trixie-security/Release.gpg'..
Release.gpg fetch failure: io: failed to lookup address information: Name or service not known
Fetching InRelease file
-> GET 'http://deb.debian.org/debian-security/dists/trixie-security/InRelease'..
InRelease fetch failure: io: failed to lookup address information: Name or service not known
Error: Neither Release(.gpg) nor InRelease available!
root@OfflineMirrorTest:~#