Clients behind win2k3 box can't FTP

[Guest Truppenzwei]

Hi I have a system whereby I have a Windows 2003 R2 box which sits behind an

ADSL router and in turn has PC's sitting behind it. It has two NIC, one

being the WAN which connects to the router and the other being the LAN which

the client PC's connect through.

 

Basically while I am able to connect to FTP servers from the server, none of

the client PC's are able to connect to any FTP server.

 

They are able to browse the internet, email etc fine, it is just FTP that

doesn't seem to work. They are able to connect to the FTP server and then

they consistently disconnect after it sends the the username.

 

The client PCs are a blend of Vista Business and XP Pro - the same error

happens on both OS.

 

I'm tearing my hair out trying to figure out how to get FTP working

Please help.

[Guest Chris M]

Re: Clients behind win2k3 box can't FTP

 

Truppenzwei wrote:

> Hi I have a system whereby I have a Windows 2003 R2 box which sits behind an

> ADSL router and in turn has PC's sitting behind it. It has two NIC, one

> being the WAN which connects to the router and the other being the LAN which

> the client PC's connect through.

>

> Basically while I am able to connect to FTP servers from the server, none of

> the client PC's are able to connect to any FTP server.

>

> They are able to browse the internet, email etc fine, it is just FTP that

> doesn't seem to work. They are able to connect to the FTP server and then

> they consistently disconnect after it sends the the username.

>

> The client PCs are a blend of Vista Business and XP Pro - the same error

> happens on both OS.

>

> I'm tearing my hair out trying to figure out how to get FTP working

> Please help.

 

 

How long does it take before the clients disconnect after logging in?

Have you tried Passive mode?

 

 

 

If passive mode doesn't work:

 

Am I correct in thinking that you have:

 

Internet<-->ADSL Router<-->W2K3<-->Clients

 

In other words, is your 2003 server acting as a NAT gateway between your

clients and the ADSL router?

 

The ADSL router is probably also configured as a NAT gateway, so my

guess would be that FTP is having some weird NAT-over-NAT problems when

you're connecting from the clients.

 

What private address ranges are you using for each part of your network?

If you're not already doing so, it might be worth using two different

address classes for your two segments (i.e. 192.168.x.y for the router

to the 2003 server, and then 172.16.x.y for the internal network where

your clients are).

 

Cheers,

 

--

Chris M.

 

Remove pants to email me.

[Guest SBS Rocker]

Re: Clients behind win2k3 box can't FTP

 

Are these your FTP servers and where do these ftp servers reside? Behind or

outside your firewall?

 

"Truppenzwei" <Truppenzwei@discussions.microsoft.com> wrote in message

news:C39AE124-F141-4090-A3ED-E7C0C7F85C98@microsoft.com...

> Hi I have a system whereby I have a Windows 2003 R2 box which sits behind

> an

> ADSL router and in turn has PC's sitting behind it. It has two NIC, one

> being the WAN which connects to the router and the other being the LAN

> which

> the client PC's connect through.

>

> Basically while I am able to connect to FTP servers from the server, none

> of

> the client PC's are able to connect to any FTP server.

>

> They are able to browse the internet, email etc fine, it is just FTP that

> doesn't seem to work. They are able to connect to the FTP server and then

> they consistently disconnect after it sends the the username.

>

> The client PCs are a blend of Vista Business and XP Pro - the same error

> happens on both OS.

>

> I'm tearing my hair out trying to figure out how to get FTP working

> Please help.