suggestion for FTP

Tsunulukai · Post by *Tsunulukai » 2003-02-13, 11:23 UTC

For user behind firewalls, corporate as well as private, a great option would be to be able to set a port range for local connections, as in FlashFXP "Limit local port range to [xxx - xxx]"

I know one possibility is to set the connection in Passive mode, but it's not what I mean, cuz then FXP transfert are unavailable (if both connections are in passive mode...)

Post by *ghisler(Author) » 2003-02-13, 11:54 UTC

Good idea! However, does anyone know how to do this? Currently TC just requests a random port from Windows, and Windows itself determines which port to use. Any idea how to request a random port within a range?

Tsunulukai · Post by *Tsunulukai » 2003-02-17, 11:20 UTC

Can't you choose a port by yourself, instead of getting it from Windows ? That way you wouldn't have to request a port from within a range as TCmd itself would choose it...
How do the server apps run on a specified port if they can't choose it by themselves ? I suppose this is possible for Tcmd... at least I hope so

Post by *ghisler(Author) » 2003-02-17, 13:41 UTC

Yes I can, but the port may already be in use - or may be in a term-wait state, which means that it can be opened, but connections will not work...

Tsunulukai · Post by *Tsunulukai » 2003-02-17, 16:11 UTC

and... is there no way for Tcmd to get the state of a specified port before using it ?
A way to get the results of a "netstat -an" and prevent Tcmd from using anyone that the command returned ?

I don't know... I'm not programmer but I guess there should be a possibility (as FlashFXP does it...)

Any programmer out of there who's got an idea ?

jofer · Post by *jofer » 2003-02-18, 07:22 UTC

>Can't you choose a port by yourself, instead of getting it from Windows ?
>>However, does anyone know how to do this?

This thread may help:
http://www.experts-exchange.com/Programming/Programming_Languages/Delphi/Q_10332325.html

EntryFrom - EntryTo
if empty -> random

BTW
How about an extra-check "Use plugin" i.e. SFTP plugin

HTH
Jochen

Post by *ghisler(Author) » 2003-02-18, 16:27 UTC

2jofer
Unfortunately the code presented there doesn't help - as some users have pointed out, as soon as a connection is made, the server can again listen on the same port - which is normally a bad idea with FTP. Perhaps I should just increment the port after using it, and check if noone is listening?