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Funny FTP result

Oldjim
Community Veteran
Posts: 38,460
Thanks: 1,035
Fixes: 62
Registered: ‎15-06-2007

Funny FTP result

Connecting to my Plusnet hosted site using FireFTP this evening it automatically switched to passive mode to upload some files.
Is there any significance with this.
Could it be due to my upstream margin dropping to 7dB (problem with the rain) even though I am not getting any errors.
2 REPLIES 2
chickendippers
Grafter
Posts: 58
Thanks: 2
Registered: ‎30-08-2008

Re: Funny FTP result

Passive mode is the best one to be in. It works better with firewalls than active mode.
oliverb
Grafter
Posts: 606
Registered: ‎02-08-2007

Re: Funny FTP result

FTP uses seperate connections, one for commands and another for data
In "Active" FTP when you connect to a server the server then makes a connection back on a different port. This works great when you have a public IP, but has problems crossing NAT since the FTP originating IP is likely to be private unless it was altered by NAT
In "Passive" FTP both channels originate from your PC, so there's little problem routing them to the server.