Port 990 FTPS , on cisco ASA firewall

Posted on 2009-05-11
Medium Priority
Last Modified: 2012-05-06
I have a Cisco ASA5520 firewall.

I have installed a FTPS server on a webserver and want to connect to it from within our network.

What is the command to allow everyone inside our network to connect to only this webserver via port 990

Have i got the correct command:

access-list inside_access_in extended permit tcp any host (WEB IP ADDRESS) eq 990


Question by:vconstantinou

Accepted Solution

egyptco earned 2000 total points
ID: 24353152
citation from cisco FAQ:

Q. Is FTP with TLS/SSL supported through the Security Appliance?

    A. No. In a typical FTP connection, either the client or the server must tell the other what port to use for data transfer. The PIX is able to inspect this conversation and open that port. However, with FTP with TLS/SSL, this conversation is encrypted and the PIX is unable to determine what ports to open. Thus, the FTP with TLS/SSL connection ultimately fails.

    One possible workaround in this situation is to use an FTP client that supports the use of a "clear comannd channel" while still using TLS/SSL to encrypt the data channel. With this option enabled, the PIX should be able to determine what port needs to be opened.

Expert Comment

ID: 24358881
Also ftps usually needs return port ranges specified aswell

Expert Comment

ID: 26298777
Can you show me the command to do "clear data channel" for ftps

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