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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