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random errors with imaps/pop3s servers offering TLS 1.3

list Lars Kollstedt
Tue, 10 Aug 2021 14:46:39 +0200
Message-Id: <2245637.gu3atHlkLY@nb-kollstedt>

On Dienstag, 30. Juli 2019 15:40:42 CEST Laurent Frigault wrote:
Hi,

I have found an issue when trying to monitor imaps and pop3s server
offering TLS1.3 .
[...]
For some strange reason, I can monitor a https web servers (running
nginx or apache) offering TLS 1.3 without this issue but not
imaps/pop3s.

It looks like the https test is different from other ssl/tls tests and
does not have the TLS 1.3 issue
Hello List,

this issue is also discussed in 

https://www.mail-archive.com/user-6a19335d3e19@xymon.invalid/msg1804680.html

and

https://salsa.debian.org/debian/xymon/-/merge_requests/1

at least contains an attempt to patch this.


I can also confirm this TLS 1.3 issue for ubuntu (currently 18.4 LTS bionic). 
It affects all banner checks in combination with TLS 1.3.

Kind regards,
	Lars

-- 
Lars Kollstedt

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