Your system information

• Steam client version (build number or date): Steam Console Client (c) Valve Corporation - version 1751406682
• Distribution (e.g. Ubuntu): Debian 12
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• Steam Logs: logs.tar.gz
• GPU: AMD iGPU

Please describe your issue in as much detail as possible:

When using steamcmd I cannot login. login anonymous returns:

Connecting anonymously to Steam Public...Retrying...
Retrying...
Retrying...
Retrying...
FAILED (No Connection)

I think the related error message is this one (in connection_log.txt):

[2025-07-13 12:15:05] Connectivity test: Starting test, fetching 'http://test.steampowered.com/204'
[2025-07-13 12:15:08] Connectivity test (96.16.122.53:80 (96.16.122.53:80)): HTTP fetch failed

However, using curl I can fetch content from this url:

curl -vvv http://test.steampowered.com/204
*   Trying [2a02:26f0:1b00::5c7b:ecd1]:80...
* Connected to test.steampowered.com (2a02:26f0:1b00::5c7b:ecd1) port 80 (#0)
> GET /204 HTTP/1.1
> Host: test.steampowered.com
> User-Agent: curl/7.88.1
> Accept: */*
>
< HTTP/1.1 204 No Content
< Accept-Ranges: bytes
< Content-Length: 0
< Content-Type: text/plain
< ETag: "d41d8cd98f00b204e9800998ecf8427e:1632937655.318639"
< Last-Modified: Wed, 29 Sep 2021 17:47:35 GMT
< Server: AkamaiNetStorage
< Date: Sun, 13 Jul 2025 10:16:16 GMT
< Connection: keep-alive
<
* Connection #0 to host test.steampowered.com left intact

Steps for reproducing this issue:

1. Install debian 12
2. Follow the documentation on how to install steamcmd from package repostories
3. Try go login anonymously