Using OCSP with VPN Policies The SonicWALL OCSP settings can be configured on a policy level or globally. To configure OCSP checking for individual VPN policies. Then click on the VPNs page. 1 Select the radio button next to Enable OCSP Check 2 Specify the OCSP Responder URL of the OCSP server, for example <http://192.168.168.220:2560> where 192.168.168.220 is the IP address of your OCSP server and 2560 is the default port of operation for the OpenCA OCSP responder service.