Issue: I am strugling to setup FTP on Apache server. FTP is setup on port 2121. ISA 2006 is presented. The firewall rule works fine: 2011-05-17 20:08:11, 10.xxx.xxx.254, 2121, Port:2121 (TCP) (Inbount), Initiated Connection FTP_2121, 94.xxx.xxx.20, External, Local Host - 0x0 ERROR_SUCCESS - 63146 0x0 P.S. xxx - is hidden numbers. Scenario 1: If AllowProxyPORT is not written to configuration file, I am getting the following FTPD error message: [Tue May 17 20:16:52 2011] [error] Rejected PORT data connection request to 10.0.1.1 (doesn't match the client IP 94.143.160.20 and not configured to AllowProxyPORT) Scenario : If AllowProxyPORT is written to configuration file, I am getting the following DTP error message: [Tue May 17 20:07:19 2011] [error] (OS 10065)A socket operation was attempted to an unreachable host. : Couldn't connect to client I can see in ISA 2006 monitoring system, that External client trying to connect to FTP server to ramdom port on each connection and External IP address of FTP server: 2011-05-17 20:08:13, 78.xxx.xxx.87, 8157, Unidentified IP Traffic, Denied Connection Default rule, 94.xxx.xxx.20, External, Local Host - 0xc004000d FWX_E_POLICY_RULES_DENIED - 30711 0x0 Any ideas? Thank you.