On Mon, 04 Mar 2019 10:06:54 +0100, Jan Just Keijser wrote: ... > Having said that, I just created a certificate set to expire on Mar 9 2037 and it passed the > following command: > c:\program files\openvpn\bin\openssl x509 -dates -subject -noout -in mycert.crt > > can you run the same command on the failing certificate? That's a poor test. 'openssl x509' doesn't verify the certificate, and the error comes up during verification. To verify, use 'openssl verify'. Here's an example with OpenSSL test files: openssl verify -trusted test/certs/root-cert.pem test/certs/ca-cert.pem So in Wolfgang's case, I suspect something like this would say more: openssl verify -trusted .....ca.crt .....user.crt Cheers, Richard -- Richard Levitte levitte@xxxxxxxxxxx OpenSSL Project http://www.openssl.org/~levitte/