Having an odd problem. I have the VSFTPD ftp server up and running on a Redhat 5 server. It's configured to encrypt logons via SSL (Verisign), has a large range of ports open for the PASV connections (over a thousand at the moment). Our DNS zone is split (meaning we manage the zone for internal users and we also manage it for the external world separately). Our Cisco firewall has everything NAT'd so I can use the public ip address of the server both internally and externally.
All works fine for the most part. However, I recently tried to download about 200 very small files (500k average). It bombed out at 150 files (50 MB or so).
Cyberduck says "connection forcibly closed by remote host". The server logs indicate a "421 Timeout" (which is odd as it was cranking away just fine when it stopped). No other errors on the server side.
I can happily transfer a 3GB file with no problems. It's only when I try to download large amounts of files that I get th errors. I can't see a limit on number of files anywhere? Anyone have any ideas? I'd like to roll out this server over the weekend but I'm hesitant with this issue?