Simply run the following command and if it work it would look like this: openssl s_client -connect play.tv2.dk:443 -status|grep -i ocsp depth=1 /C=US/O=GeoTrust Inc./CN=RapidSSL SHA256 CA verify error:num=20:unable to get local issuer certificate verify return:0 OCSP response: OCSP Response Data: OCSP Response Status: successful (0x0) Response Type: Basic OCSP Response Subject: CN=RapidSSL SHA256 CA OCSP Responder OCSP No Check: OCSP Signing If it doesn't work or doesn't support OCSP stapling the response would be like this: openssl s_client -connect xxx.dk:443 -status|grep -i ocsp depth=2 /C=US/O=GeoTrust Inc./CN=GeoTrust Global CA verify error:num=20:unable to get local issuer certificate verify return:0 OCSP response: no response sent