We have ASA5510/20 running in NAT/routed mode. We received a request to open ports for internal server to make FTPS connection to outside servers. Internal server initiate the connection. External vendor asked us to open 9021 (FTP ctrl) & 20000-20099 (PASV/EPASV) for their IPs. Long time back while I was testing with FTPS via PIX, ran into some data transfer issues. Never got a chance to check on it later.The ASAs running 7.2 (4) and 7.1 (2). Using One-one NAT for servers. Do this still poses encryption issues for FTPS or not to expect any issues for the FTPS connectivity (with the above said ports opened).
Thanks in advance