Good day! I have a site-to-site VPN connection (Ipsec) between Microtik RB-450 (OS 5.2) and Microsoft ISA Server 2006 with pre-shared key authentication. I want to setup this connection using certificates. I used OpenSSL for windows, generated all necessary certificates, imported certificates with keys in windows and RouterOS 5.2. Unfortunately, VPN connection has not been established. Does anybody use VPN Ipsec connection with certificates?