Understanding the output of openssl s_client - Server Fault
Apr 17, 2014 · Ever since our email provider changed their SSL certificate, a POP3 client based on mono refuses to connect to their secure POP server to download emails. Other clients do not have …
How to view certificate chain using openssl - Server Fault
Apr 7, 2020 · I also haven't figured out a way to show the certificate chain using openssl either, for example, the following command openssl x509 -in certificate.crt -text does not show a hierarchical …
Displaying a remote SSL certificate details using CLI tools
Jan 23, 2015 · You should be able to use OpenSSL for your purpose: echo | openssl s_client -showcerts -servername gnupg.org -connect gnupg.org:443 2>/dev/null | openssl x509 -inform pem -noout -text …
openssl s_client works with IP, but does nothing with domain name
Jul 5, 2023 · openssl s_client -connect my_domainname.com:443 i.e., with the registered domain name, then simply nothing seems to happen, openssl-s_client doesn't never returns (as if it were still trying …
Getting SSL certificate from remote server with OpenSSL
Jun 3, 2020 · I'm trying to validate a SSL certificate using OpenSSL from command line: openssl s_client -showcerts -connect server.org:443 But no matter which domain on this server I call that way …
Connection to URL using OpenSSL client works, but curl fails
Jul 1, 2008 · I am getting inconsistent results, depending on whether I use OpenSSL or curl to make the connection: openssl s_client -connect <server>:443 -CAfile /path/to/GeoTrustCA.pem
How can I detect if a server is using SNI for HTTPS?
May 8, 2013 · Dennis - disagree on openssl. Some details are available: openssl s_client -servername alice.sni.velox.ch -tlsextdebug -msg -connect alice.sni.velox.ch:443 Some indication of using SNI is …
openssl - SSL/TLS Client Authentication: How to see Acceptable client ...
Sep 6, 2017 · I have an HTTPS Service which uses SSL/TLS client authentication and requires a certificate to be presented. How can I get a list of Acceptable client certificate CA names using …
openssl - SSL Certificate error: verify error:num=20:unable to get ...
I tried using this: openssl s_client -connect the.server.edu:3269 With the following result: verify error:num=20:unable to get local issuer certificate I thought, OK, well server's an old production …
Error during openssl s_client connection, SSL alert number 48
tlsv1 alert unknown ca The server cannot verify the client certificate you've sent because it does not find any path to the CA's trusted by the server.