Ingeborg, HTTP/2 support is currently not in xymon, including in the 4.4alpha1 development tree. I did a little testing, and sites like google that support HTTP/2 still pass the xymonnet checks as seen below:

$ curl --head https://www.google.com | head -1 HTTP/2 200 $ grep google ~/server/etc/hosts.cfg 0.0.0.0 www.google.com # conn https://www.google.com/ $ ~/server/bin/xymonnet --no-update www.google.com |grep -B2 HTTP &green https://www.google.com/ - OK

HTTP/1.1 200 OK $ ~/server/bin/xymonnet --no-update www.google.com |grep -i ssl status+30 www,google,com.sslcert green Wed Nov 1 08:38:21 2023 &green SSL certificate for https://www.google.com/ expires in 2252 days

Perhaps the website you are testing is configured to support HTTP/2 and not support HTTP/1? Try running the xymonnet command manually similar to what I did here.

Tom Schmidt

On Wed, Nov 1, 2023 at 7:28?AM Ingeborg Hellemo via Xymon <xymon at xymon.com> wrote:

---------- Forwarded message ---------- From: Ingeborg Hellemo <ingeborg.hellemo at uit.no> To: xymon at xymon.com Cc: Bcc: Date: Wed, 01 Nov 2023 14:21:04 +0100 Subject: Missing support for HTTP/2 ? I have a webserver which works ok when you visit it in a browser or when you use curl, but Xymon http test shows "SSL error". Tests with "openssl s_client" from the command line works as expected.

Could the culprit be that xymonnet does not support HTTP/2 ?

/#curl --head https://<servername>/ HTTP/2 200 cache-control: private content-length: 4423 content-type: text/html strict-transport-security: max-age=31536000 date: Wed, 01 Nov 2023 13:15:44 GMT

--Ingeborg

Ingeborg ?strem Hellemo -- ingeborg.hellemo at uit.no Dep. of Information Technology --- Univ. of Troms?

---------- Forwarded message ---------- From: Ingeborg Hellemo via Xymon <xymon at xymon.com> To: xymon at xymon.com Cc: Bcc: Date: Wed, 01 Nov 2023 14:21:04 +0100 Subject: [Xymon] Missing support for HTTP/2 ?

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