Dear Philipp, thanks for your suggestion. However unfortunately I have no access to the failing system for the next 9 days.
Ok, so if there is no blocking on your side, it looks like the blocking is somewhere in between. Maybe the company that I am working for has installed a virus scanning firewall that found something suspicious and therefore is blocking the request. However I want to point out that I did not actively select HTTP instead of HTTPS. Just installed the trixie RC2 as it came, and used apt in its out-of-the-box configuration. So if that analysis is correct, maybe the default apt configuration is not ideal for installing behind a firewall? Just a thought. The issue is closed now, and I think I have enough info to be able to proceed even on the system that failed before. Thanks an best regards, Christoph -----Original Message----- From: Philipp Kern <[email protected]> Sent: Saturday, August 2, 2025 8:58 PM To: Christoph Strunk <[email protected]>; 'Adam D. Barratt' <[email protected]>; '[email protected]' <[email protected]> Cc: '[email protected]' <[email protected]>; 'Simon McVittie' <[email protected]> Subject: Re: Bug#1110212: Failed while fetching libcap-dev from deb.debian.org (Fastly): 403 Forbidden Hi, On 8/1/25 9:40 PM, Christoph Strunk wrote: > thanks for your message. I am out of office for 10 days, > so I tried the same steps again on a different PC. > This time it worked without any problem. I suspect that something intercepted your HTTP requests. Debug headers with "-o Debug::Acquire::http=true" would help here - however there would be nothing we can do. It is highly unlikely that the 403 was generated by us (or our infrastructure). With HTTPS such interception would not be possible, though. Kind regards Philipp Kern

