Entering Passive Mode (Wrong IP)

oldhouse · 10-14-2005, 05:32 PM

I have a problem with some ftp users that try to fxp.

Main problem is explained by this line in logs:

227 Entering Passive Mode (10,8,0,62,5,228)

Ftp client takes this IP to make transfer, but this is a VPN ip, not pc real IP.
I need to know if there is a way to force ftp client, whatever it is, to use the pc real ip, maybe with an advanced configuration.

If anyone is so kind to post such a solution in a clear way, I would be thankful.

Mouton · 10-14-2005, 07:41 PM

Edit your ioFTPD.ini, Host = 0.0.0.0 should be replaced by Host = your_external_ip

oldhouse · 10-15-2005, 02:46 AM

I can't do that, cause external ip is different from real pc ip, since it's behind nat, and nat ip is not reachable from external addresses, and that's why i have to use a vpn.
Weird thing is that it happens only on some users.

EwarWoo · 10-15-2005, 03:49 AM

Try:
Bind = real pc ip

Mainly used for when behind a router, but may make a diff.

oldhouse · 10-15-2005, 04:51 AM

I tried that too, but then no one will be able to reach server

Mouton · 10-15-2005, 06:41 AM

Host is not used at all when connections are established.
ie Host = 0.0.0.0 or Host = real pc ip doesn't matter until the ftp client sends a PASV command.
Only Bind = xyz is used to determine on which IP it listens for connections. And Bind = 0.0.0.0 should be kept as it is. You only need to change Host = xxxx to what IP you want PASV to return.

This error stops some users because other users forced their FTP client to send the PASV command to the *other* ftp server they are fxping to. Thats means only the other server needs to support pasv, and not yours.
If some users are behind a gateway, they need to enable PASV to be able to download, which will cause this error for them too.

oldhouse · 10-17-2005, 05:00 PM

Thx very much mouton.
It was my fault setting Host to the right ip, but leaving bind with ; in fron of it.
Now it works fine.
Thx again