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Hello, I'm using nagios for website monitoring and recently one of the sites was migrated to https. I'll abstract from the nagios config now and directly show the problem on the plugin. I now want to migrate the following command to https: check_http -H <url> What works: wget https://<url> What does not work (with result): check_http -S -H <url> (timeout) check_http --ssl -H <url> (timeout) check_http --ssl=1 -H <url> (timeout) check_http --ssl=2 -H <url> (SSL protocol version 2 is not supported by your SSL library.) check_http --ssl=3 -H <url> (sslv3 alert handshake failure:s3_pkt.c:1294:SSL alert number 40) check_http -p 443 -H <url> (timeout) I also tried to enable sni or additionally provide the IP via -I, but this did not change anything. I discovered the third-party check_https plugin which actually wraps wget. However, I'd like to use the -s option from check_http which is not provided by check_https. The version: $ check_http --version check_http v2.1.1 (monitoring-plugins 2.1.1) The tests were executed on a debian server as root (I know that I should not run nagios as root, but for testing this issue it seemed appropriate .) Best, Gereon - -- Gereon Kremer Lehr- und Forschungsgebiet Theorie Hybrider Systeme RWTH Aachen Tel: +49 241 80 21243 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJWinvHAAoJEIQ2nMX673Hf9g8IAI9XHrcsvADAqngEeXkYEeJO a+K8P3CK23Ft/V6num7Mg0DO0uMdPoGFKamaaVSR4Biq29INyYmx9wgMCgkQ5b3o c7O/CZbSG9GlZ327WUJQWo05DR4z7ctRJD83IhAIBw/IOt3mb/nUih06Bb8xFUxi f2Om8gSsD0yX7zWhcC2f+J8K8XG9AmacDqJFcMdptlHmdWbVRvkcVrJG+pJn6qXv UdH2D7/fPELjy1MfUx6tanUEl2FbvrWXIVzxOAClihsiDuDGAdwkRJz/837WWKqw im8p7L+4QHyRZzFIREf8rXuLeq7bJvMNjFeJ/BlD8g+0uvBC/W+OdkswHNBFmTw= =mDIK -----END PGP SIGNATURE-----