Hello Walter, I did not found file ca.pem (root certificate) for testing. Thanks Mark
From: openssl-users [mailto:openssl-users-boun...@openssl.org] On Behalf Of Walter H. Sent: Wednesday, May 30, 2018 11:17 AM To: openssl-users@openssl.org Subject: Re: [openssl-users] Test SSL connection On 30.05.2018 08:45, Mark Shnaider via openssl-users wrote: Hello, I use OpenSSL version is openssl-1.1.0h(Windows) and I run following command from apps directory openssl s_server -accept 443 -www The server in this case use certificate "server.pem" On client computer I run command openssl s_client -connect 10.65.48.108:443 On client computer I get error : Verify return code: 21 (unable to verify the first certificate) What is wrong? Thanks for any help Mark very probable, that the client doesn't have the root ca certificate of the ca certificate that signed server.pem you should have at least the following ca.pem - the root ca server.pem - the server ssl/tls certificate Walter
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