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FTPS on Port 990 Thru ISA Server 2000

Posted on 2006-04-20
Medium Priority
Last Modified: 2012-05-05
I am trying to access a remote secure ftp site using Secure FTP 2.5. I hvae configured the client to use port 990 for implicit communication. I have all of the typical ISA rules enabled. Is there something else I should be checking. I receive 'Connection Failed' everytime I attempt to connect.
Question by:chantalcookware
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LVL 51

Expert Comment

by:Keith Alabaster
ID: 16499654
What do you mean by 'the typical isa rules enabled'? The default install blocks all traffic so I am not clear on your statement.
Have you installed the service packs for ISA? In the early days, ISA proxies could be a little 'unorthodox'...

Are you trying the connection from a client or from the ISA server itself?
Have you installed the ISA Firewall client on your work stations or are you using SecureNAT?
What are you seeing in the ISA logs?

Author Comment

ID: 16499727
All service packs are installed. There are many protocol definitions and ip packet filters in place. Regular FTP works thru port 21, but my secure FTP thru 990 doesn't work. I don't see anything in the logs which would indicate the problem in ISA. I am attempting to connect from a machine on the internal network. The same machine can ping the ftp site successfully, but can't negotiate thru Secure FTP. The firewall client is not installed on this computer.
LVL 51

Expert Comment

by:Keith Alabaster
ID: 16500682
So are you using Securenat? (Do you have your PC's default gateway pointed at the ISA servers internal interface?)
What is the secondary port number that you are using for the secure FTP? Regular FTP uses port 21 TCP with a secondary port of 20 on UDP. Does the secure FTP need a secondary port as well?

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Author Comment

ID: 16502144
I don't think we are using Secure NAT, but default gateway is the internal interface address. The secondary port is between 3000 and 3200. I didn't set anything up for that. The primary port to connect on is 990. Thank you for all of your help
LVL 51

Accepted Solution

Keith Alabaster earned 2000 total points
ID: 16502194
If you are pointing to the inside ISA interface, that IS SecureNAT.
So, have created the secondary port on your 990 protocol? Does it now work OK?
LVL 51

Expert Comment

by:Keith Alabaster
ID: 16502235
Brilliant & thanks.


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