This kind of connections are made if your local computer serves as a jumpbox as described here: Create a custom tunnel. Settings defined here are applied when a tunnel originates from this machine. Allowed listen filter - IP and p ort filters defined here apply to connections being made to your local machine from your own local network (including your own machine connecting to itself trough localhost).Trough this settings you can control whether this computer can serve as a jumpbox, as described here: Create an SSH session using a jumpbox. Settings defined here are applied when a tunnel originates from another machine and is made to this computer. Allowed connect filter - IP and port filters defined here apply to connections being made from this computer onward (either to other computers in the local network or to the computer itself trough localhost address).The following settings are available to you in the Port Forward section: Rules for the remote side can be placed into the Allowed listen filter as seen below, using allow/deny_remote_ip and allow/deny_remote_port. For example, if you specify the Allowed connect filter rules on your computer and you create a tunnel from your computer to another machine, the specified rules will have no effect. The Allowed listen filter rules are applied on the side that initialized the tunnel and the Allowed connect filter rules are applied on the side that receives the tunnel. Important: When creating a tunnel one side of ISL Light session (usually the operator's side) initializes it and the tunnel is made from the initializing computer to the remote computer. Please proceed to the part relevant to you:
Topic is divided into two parts, in the first one the rules and notation is explained and in the second part some practical examples are given. Port Forward settings work in combination with tunnelled connections further described in the following topics: Remote Desktop Connection (RDP/SSH) and Create new Tunnelled Connection and allow you to further limit who can create tunnelled connections and which ports can be used.
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