Connecting through ISA firewall

Question

I am tring to connect Contribute 3.11 through our company ISA
authentication (firewall). The network provider tells me that ports
20 and 21 are open for FTP but about halfway through the connection
process, I get prompted for authentication username and password. 3
tries and I'm out
. I have also tried full domainname\username with
password and that bombs too. Has anybody else seen this or know how
to get around it?
I can connect just fine on my home PC so I know my
destination settings and permissions are OK. Any help is greatly
appreciated.

Answer 1

1. You can specify proxy settings in Contribute by going to
Edit > Preferences > FTP Proxy.
2. try disabling any antivirus software or firewall running
on your system.
3. make sure you install the ISA Firewall Client in your
System:
http://www.isaserver.org/tutorials/Manually_installing_the_ISA_firewall_client.html
4. to verify if FTP is indeed enabled, try to type this in
IE: ftp://ftp.irs.gov
see if you can access the folders; if not, your system admin
is lying; ftp is not enabled
5. go to control panel > internet options > advanced;
make sure that user http 1.1 through proxy connections is checked