Dropbox is an incredible useful thing to synchronize files between different computers (e.g. at work, at home, laptop…). However, I could not get it running on my work PC…

…but now I found out why: It is because of my company’s ISA proxy, and the workaround is described in http://forums.getdropbox.com/topic.php?id=3957

• Extract and execute “install.bat”
• In c:/Programme/cntlm/cntlm.ini, change the following lines:
Username <Windows-Loginname>
Domain vie-i
Proxy vieisa:8080
• Execute cntlm -I -M http://test.com
• Copy-Past the “Profile” lines from the commandline into cntlm.ini, in my case:
Auth NTLMv2
PassNTLMv2 ############################
(remove the existing “Auth” and “Password” entries)
• Start the “Cntlm Authentication Proxy” service
• Configure “localhost:3128″ as Dropbox proxy (HTTP, no authentication)

This proxy can be used for any application that requires internet access (so it is no longer necessary to enter the proxy authentication data in multiple applications)