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ongtw Mar-17-01 12:48 PM
hi pple,
i got my LAN up and working. The problem is only the gateway can use the external IP. All the other computers can only use their pre-defined internal IP. Are there anyway that i can make it so that all my computers can use the external ip?

This is because i need to set up 2 ftp servers. One using the gateway PC and the other one in another computer. The one using the gateway PC faces no problems as it can use the external IP. However, for the other ftp server, i can't seem to log into it from outside.

pls help

lbyard Mar-18-01 04:59 PM
In response to message 0
Your question is kind of hard to even begin answering without knowing what operating systems are running on the computers. Larry

ongtw Mar-19-01 01:36 AM
In response to message 1
oops. sorry.. forgot to add that
the gateway and two other PCs are operating with windows ME while the last one operates with win98 SE.

lbyard Mar-19-01 05:37 PM
In response to message 2
Ok, what and which computer are you using to share the Internet connection? The normal FTP port is 21. I haven't looked into this much, but there may/should be away to open another port in the NAT, etc. for the other FTP server; but the port would have to be specified by external computers to connect to it. Larry

ongtw Mar-20-01 06:12 AM
In response to message 3
actuall i already tried opening up a new port for my second PC
but then for the second PC, when i run the ftp program, it will only listen to the internally specified IP address while ignoring the external ip. so there's no wan pple can connect to it from outside the LAN.
i'm using windows ME to share the connection.

lbyard Mar-20-01 01:13 PM
In response to message 4
What are using for an FTP server? Larry

ongtw Mar-20-01 04:14 PM
In response to message 8
serv-u ftp server

lbyard Mar-20-01 07:36 PM
In response to message 9
LAST EDITED ON Mar-20-01 AT 07:37 PM (GMT)


This procedure is for Wingate (which may be an option), but should be similar for other NATs. Note static IP requirement. I posted a how to on setting up static IPs for Win 98 SE ICS in this Forum yesterday or the day before…

“Q.How do I allow users to connect to my Serv-U server from behind a WinGate proxy server?
A.To allow connections to your Serv-U server, behind WinGate, complete the following steps:
These steps assume the FTP server is set to port 21.
1. Logon to GateKeeper with Administrative rights
2. Expand the tree
3. Double click the
4. Select the tab
5. Ensure that the top radio button is selected to
6. Click the tab
7. Click on the radio button
8. Enter the of the client machine hosting the FTP server behind WinGate, to which all FTP requests from the Internet will be directed : This client machine must have a static IP address in order for this to work properly
9. Enter the port as <21>
10. Click
11. Click the
In knowledge base on same site:
“NOTE: The FTP Clients will need to connect to FTP Serv-U using PASV (passive) mode. This is because of the Firewall (WinGate) in-between the FTP Client and FTP Server. Open FTP Serv-U From the top menu bar, click Setup In the drop down menu, click”
“SERVER IS NOT LISTENING: Port number 21 is already in use!
This error indicates that some other piece of software is using port 21. Usually, this is IIS. If you are running Windows NT, look for an FTP Service that is already running. You should be able to locate this under the service icon in the control panel. If you are running Windows 95 or 98 you will want to look for any other FTP Server software. If there is another FTP Server using port 21, disable it.
A second option is to switch the port number that FTP Serv-U listens on. To do this you will open up the main Serv-U window and then select Setup and FTP Server. Here you should see a field titled "FTP Port Number". It is recommend that you switch this to port 27. Then close and re-open FTP Serv-U. You should now see a line that looks like this:
FTP Server on-line: IP-number(s) (or whatever your IP address is), port number 27
Note: if you do decide to change the port Serv-U is listening on you will want to let your FTP Clients know. In this case they would now need to connect to (or whatever your IP address is) on port 27 instead of on port 21.”
See http://support.microsoft.com/support/kb/articles/Q230/1/48.ASP?LN=EN-US&SD=gn&FR=0&qry=ics&rnk=20&src=DHCS_MSPSS_gn_SRCH&SPR=WINME for changing the DHCP IP address range in Win Me ICS so it will not interfere with static IPs assigned to clients. Larry

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