FTPS (SSL/TLS) Client / Server connection through ISA Server

Hi,

FTP(S) and ISA Server, it’s allways a bi***
Not to mistake with SFTP btw, a kind of FTP over SSH.
When going through these posts:

http://trycatch.be/blogs/decaluwet/archive/2009/01/30/publishing-iis7-secure-ftps-with-tls-aut-via-isa-gt-550-access-is-denied.aspx
http://trycatch.be/blogs/decaluwet/archive/2009/01/30/part-2-publishing-iis7-secure-ftps-with-tls-aut-via-isa-gt-550-access-is-denied.aspx

And

http://www.isaserver.org/articles/How_the_FTP_protocol_Challenges_Firewall_Security.html

Stil ended up with a 550 error while accessing FTPS Server with FTPS Client through ISA. (when server is getting AUTH SSL / TLS cmd.)
Ended up disabeling the ISA “FTP Access Filter” ,  not just for this rule only but for the whole ISA Server.
(expand: Server,Ad-ins, FTP Access Filter, Disable it. It took quite a while to complete, do restart the firewall service when it asks.).

NOTE !! (If you have existing FTP (not FTPS) Rules, you might have to adjust them too)

 

Greetz.