[Zope] FTP Client Weirdness

[Patrick Phalen]

[Jonathan, on Fri, 17 Dec 1999]
:: Hi,
:: 
:: Just ran into a weird problem: while ftp and ncftp on Linux work 
:: fine, the GUI clients don't seem to work for some strange reason 
:: (both on Windows and Mac). The error it generates is as follows:
:: 
::   ERROR(200) ZServer unexpected disconnect on data xmit channel
:: 
:: Any ideas?!

Sounds like a firewalling setup problem.

Are you using NAT or IP Masquerading? Does your firewall permit
inbound requests on port 21 without the ACK bit set?

Are you in PASV mode when using ncftp/ftp?

Are you using an older Checkpoint or other dynamic filtering firewall?