When reviewing the instructions on certificate installation I get an error

[admin admin]

When I review these instructions on certificate installation to install a certificate for an external proxy an error is being thrown:

https://confluence.atlassian.com/kb/how-to-import-a-public-ssl-certificate-into-a-jvm-867025849.html

openssl s_client -connect jira.mydomain.com:443 -servername jira.mydomain.com:443 < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /tmp/public.crt
140683954233792:error:0200206F:system library:connect:Connection refused:../crypto/bio/b_sock2.c:110:
140683954233792:error:2008A067:BIO routines:BIO_connect:connect error:../crypto/bio/b_sock2.c:111:
connect:errno=111

[M Amine]

what is the version of openssl you are using? what is your system version?