Re: trying to port forward
- From: Gerald Vogt <vogt@xxxxxxxxxxx>
- Date: Mon, 26 Mar 2007 21:16:44 +0900
nettlemark@xxxxxxxxx wrote:
I am trying to port forward. So far I have
- declared the port open in the client app
O.K. Could you be more specific. It is easier to explain things with your actual settings instead of referring to it verbally...
- setup rules in my router that (should) allow access to the same port
What settings did you use exactly? What router?
- setup a static IP (may be the wrong term, but I have defined the IP
rather than let the ISP determine it)
That is not correct. You should setup a static IP address on the computer which is the destination of the port forwarding. If the computer does not have a static IP address but gets a dynamic one through DHCP the IP address of the computer can change after some time. To have a working steady port forwarding the computer should have a static IP address.
You can either setup the static IP address on the computer itself (configure the TCP/IP settings on the local area network connection) or your router may have the ability to assign fixed IP addresses to the computer. But this depends very much on the router you use.
You are not supposed to change the internet settings on the router! If your ISP requires DHCP on the internet connection you must use DHCP. It may work for a while to use a static IP address on the connection but it is impossible to tell how long. Therefore, if you changed the internet connection settings on the router set them back to what it was before.
You can see the current IP address of the computer in the network connections control panel if you click on the icon of the local area connection (or the wireless connection if the computer is connected wireless to the router).
- allowed the app to act as a server in Zonealarm (free version)
For test purposes you should turn off ZoneAlarm. As you are running behind a router the computer is not directly accessible from the internet except for the port forwarding. To rule out the ZA is causing the problem, turn it off completely or deinstall it.
- set the app as an exception in xp security centre
This looks to me as if you are running two firewalls: ZoneAlarm and the XP Firewall. Do not do that. Two firewalls won't increase security. On the contrary, they may affect each others performance and cause other problems. Thus, you have to decide which firewall you want to use in the long run. For test purposes you should also turn off the XP firewall.
When I go to http://www.canyouseeme.org/ it announces my IP
incorrectly, ie its not the IP address that I defined. I type in the
port I am trying to open and it times out trying to find it.
A standard router with NAT is used to share a single public internet IP address (which you would see in www.canyouseeme.org) with several computers connected to the router in a private LAN. The private LAN uses private addresses like 192.168.*.*. These addresses are assigned to the computers and devices in the LAN. The router maps between the public IP address and the private ones.
Thus, while canyouseeme shows you the public IP address that IP address is not the destination of the port forwarding. The destination is the private IP address of the computer to which you are forwarding the port. In other words, it is perfectly normal that you see a different IP address on that website then configured in the port forwarding.
Still, if it is a TCP port forwarding to a TCP server the port should be recognized as open.
Gerald
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