Thanks for the info.

Graham

-----Original Message-----
From: TWSocket [mailto:[email protected]] On Behalf Of Angus
Robertson - Magenta Systems Ltd
Sent: 13 February 2015 10:55
To: [email protected]
Subject: Re: [twsocket] FTP Client - Port Number

> I have a user who wants to change the FTP Port number to something 
> like 14581.

Component wise there is no problem using strange ports, I use 2100 for
testing stuff.  

But NAT routers may be less forgiving, they need to modify IP addresses in
the control channel to forward packets and know which port to open for the
data connection, and expect port 21.
This is mainly a server issue, the client can use passive mode.

Angus
 

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