I'm getting an error with HTTP sources when trying to run
root@hostname:~# apt-get update Hit:1 https://ftp.us.debian.org/debian buster InRelease Err:2 http://security.debian.org buster/updates InRelease Connection failed [IP: 188.8.131.52 80] Hit:3 https://ftp.us.debian.org/debian buster-updates InRelease Reading package lists... Done W: Failed to fetch http://security.debian.org/dists/buster/updates/InRelease Connection failed [IP: 184.108.40.206 80] W: Some index files failed to download. They have been ignored, or old ones used instead.
This error doesn't occur when using HTTPS (as shown). There is also no issue opening these in a web browser. Unfortunately it looks like the Debian security updates repository ironically doesn't support HTTPS at the moment.
I'm behind a corporate firewall but haven't encountered many issues before, apart from having to add the root cert to new installs. I also haven't encountered any issues with RHEL/CentOS or with Ubuntu. How can I diagnose this? I don't see any logs in the usual locations (