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If you need to forward multiple ports, you will have to manually create multiple portproxy redirecting rules. Windows cannot forward a range of TCP ports. So despite the browser accessing the local computer address, it opens a page from an external web server. Now, the Google search page will open if you go to in your browser (you need to ignore SSL_ERROR_BAD_CERT_DOMAIN errors). Netsh interface portproxy add v4tov4 listenport=9090 connectport=443 connectaddress= protocol=tcp For example, you want to forward the connections from local port 9090 to a remote HTTPS server ( :443) Netsh interface portproxy add v4tov4 listenport=443 listenaddress=0.0.0.0 connectport=443 connectaddress=$wsl_ipaddr Īnother implicit feature of portproxy is the ability to make any remote network service look like it runs locally. $wsl_ipaddr = wsl -d Ubuntu-20.04 hostname -I If you have WSL (Windows Subsystem for Linux) installed on your computer, you can create a simple PowerShell script to create a port forwarding rule to the WSL 2 virtual machine (a WSL2 VM has its own virtual ethernet adapter with a unique IP address): The list of NAT port forwarding rules in Windows Server can be listed as follows: You can configure port forwarding between server network interfaces using the graphical snap-in ( rrasmgmt.msc) or with the command: You can use Windows Server with the RRAS (Routing and Remote Access Service and NAT) role installed to enable port forwarding for UDP traffic. Also, you can’t use the loopback interface 127.0.0.1 (localhost) as the connectaddress. You won’t be able to forward UDP ports this way. This port forwarding scheme works only for TCP ports. All netsh interface portproxy rules are persistent and remain after a Windows restart. You can create any number of port forwarding rules in Windows. Remove-NetFirewallRule -Name RDP_3340 Managing Netsh Port Forwarding Rules in Windows Netsh advfirewall firewall del rule name="RDP_3340" If you disable the portproxy rule, be sure to remove the remaining firewall rule as follows: This port is only listened on by the network driver. When creating an inbound firewall rule for TCP/3340 port via Windows Defender Firewall graphical interface, you don’t need to associate a program or process with the rule. New-NetFirewallRule -DisplayName "forwarder_RDP_3340" -Direction Inbound -Protocol TCP –LocalPort 3340 -Action Allow Or using the New-NetFirewallRule PowerShell cmdlet: Netsh advfirewall firewall add rule name="forwarded_RDPport_3340" protocol=TCP dir=in localip=10.1.1.110 localport=3340 action=allow You can add a new allow rule to Windows Defender Firewall with the command: Configuring Firewall Rules for Port Forwarding Mode in WindowsĮnsure that your firewall (Microsoft Windows Defender or a third-party firewall, which is often part of the anti-virus software) allows incoming connections to the new port. If you need to use source IP forwarding, you need to use NAT on an external firewall or on Hyper-V (described below).Īlso, you can use the SSH tunnels in Windows to forward the local port to a remote server. Those, if you forward port 443 port from a Windows device to an internal web server, then all incoming connections will appear on the target server as coming from the same IP address (from your Windows host with netsh portproxy enabled). Note that the portproxy mode in Windows doesn’t support saving the source IP in a forwarded network packet. This rule will redirect all incoming RDP traffic (from local TCP port 3389) from this computer to a remote host with an IP address 192.168.1.100. Netsh interface portproxy add v4tov4 listenport=3389 listenaddress=0.0.0.0 connectport=3389 connectaddress=192.168.100.101 If you want to forward an incoming TCP connection to a remote computer, use the following command: Get-ItemProperty -Path HKLM:\SYSTEM\CurrentControlSet\Services\PortProxy\v4tov4\tcp You can list the netsh forwarding rules in the registry using PowerShell: Portproxy port forwarding rules are permanent and are not cleared when you restart Windows. The RDP connection should be established successfully. In this example, port TCP/3340 must first be opened in Windows Defender Firewall (see the next section of the article).
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