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OpenSSH in Debian and FOSS Activity Reports by Ben Hutchings
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Michael Prokop: OpenSSH penalty behavior in Debian/trixie #newintrixie
This topic came up at a customer of mine in September 2024, when working on Debian/trixie support. Since then I wanted to blog about it to make people aware of this new OpenSSH feature and behavior. I finally found some spare minutes at Debian’s BSP in Vienna, so here we are. :)
Some of our Q/A jobs failed to run against Debian/trixie, in the debug logs we found:
debug1: kex_exchange_identification: banner line 0: Not allowed at this time
This Not allowed at this time pointed to a new OpenSSH feature. OpenSSH introduced options to penalize undesirable behavior with version 9.8p1, see OpenSSH Release Notes, and also sshd source code.
FTR, on the SSH server side, you’ll see messages like that: [...] -
Ben Hutchings: FOSS activity in March 2025
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Ben Hutchings: FOSS activity in February 2025
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Ben Hutchings: FOSS activity in January 2025
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Ben Hutchings: FOSS activity in December 2024
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Ben Hutchings: FOSS activity in November 2024