What is TCP Tunnel? ------------------- TCP Tunnel is a port forwarder, or a port mapper. TCP Tunnel redirect TCP connections from a local port to a remote IP and port. TCP Tunnel acts as an intermediate layer between a client and a server For example: ---------------------------------------------------------------------------- | A client that connects to the machine with TCP Tunnel | | | | >telnet host_with_tcptunnel 23 | ---------------------------------------------------------------------------- | | V ---------------------------------------------------------------------------- | The machine, "host_with_tcptunnel", with TCP tunnel running. | | | | >tcptunnel -listenport 23 -tohost destination_host -toport 23 | ---------------------------------------------------------------------------- | | V ---------------------------------------------------------------------------- | The machine, "destination_host", with a server running at port 23 | | | ---------------------------------------------------------------------------- What is the difference between the registered and demo version? --------------------------------------------------------------- None. The demo is fully functional. No disabled features. You may use the demo in 30 days. Does the TCP tunnel do IP rerouting? ------------------------------------ No, the TCP tunnel is a port forwarder on the TCP level, it does not work as a firewall, NAT, or ipchains. It will only reroute TCP connections for a particular port to a port on another computer. For example, you may forward port 110 on your computer to port 110 on pop.mail.yahoo.com. When someone connects to port 110 on your computer, they will actually get a connection to port 110 on pop.mail.yahoo.com. I get the error message "Could not find the DLL WS2_32.dll". What should I do? ------------------------------------------------------------------------------ If you get the error message "Could not find the DLL WS2_32.dll", please download and install Microsoft's Winsock 2 update for Windows 95 at http://www.microsoft.com/Windows95/downloads/contents/WUAdminTools/S_WUNetworkingTools/W95Sockets2/Default.asp I have problems getting it to run. What should I do? ---------------------------------------------------- No problems, send us an email and tell us what you would like to do, and we'll try to help you. Only a few computers where I work have access to the internet. Is there a way to use TCP tunnel to surf from a computer that does not have internet access? ----------------------------------------------------------------------------------------------------------------------------------------------------------- TCP Tunnel can solve this, if 1. There is one windows computer with internet access that you have access to. You will run TCP Tunnel on this machine. Let us call this machine "WITH_INTERNET". 2. Your computer (let us call this machine "WITHOUT_INTERNET") can connect to WITH_INTERNET. 3. You know some (public) HTTP proxy on the internet. For example, anon.free.anonymizer.com:80 Here's one solution to the problem: First, on the computer with internet access, start the tcptunnel, WITH_INTERNET> tcptunnel -listenport 7070 -tohost anon.free.anonymizer.com -toport 80 this will forward connections made to port 7070 to anon.free.anonymizer.com:80 Second, on the machine without internet access, edit the http proxy settings for the web browser like this: http proxy: WITH_INTERNET http proxy port: 7070 You have internet access, just like that! The browser will connect to WITH_INTERNET:7070 when trying to get a page. TCP Tunnel forward the connection to the proxy at anon.free.anonymizer.com:80. anon.free.anonymizer.com will get the actual web page. (If the proxy, anon.free.anonymizer.com:80, is not available, please contact us and we'll send you another one. There are plenty of public proxies.) It doesn't seem to work with FTP. I get a 500 Illegal PORT message? ------------------------------------------------------------------- No problems. Most likely you can configure your FTP client to use passive transfer. In Internet Explorer 5.5. Tools->Internet Options->Advanced. Under "Browsing", mark the "Use Passive FTP for ...". In WSFTP you can configure this under Connect->Session properites->Advanced. I think I've found a bug. What should I do? ------------------------------------------- Please contact us with information about the bug and we'll fix it as soon as possible.