![]() ![]() Specific DNS name or a wildcard of the form *.com, *. or IPv6 rules work similarly to IPv4 rules, except that there are up to 128 significant bits.Ī DNS name rule allows you to specify a destination either using a Significant bits = 0 will match any destination, and is equivalent to a match-all rule. There are four types ofĬonnect rules: those that match IPv4 addresses, IPv4 addresses, DNS names, and a separate rule type that matches everything.Īn IPv4 rule allows you to specify either a complete IP address (significant bits = 32) or a whole subnet (significant bits = 8 for 255.0.0.0, 16 forĢ55.255.0.0 or 24 for 255.255.255.0). ![]() Connect rulesĬonnect rules control what destinations the SSH client will be able to connect to using client-2-server port forwarding. Such fine-grained control is provided by the Connect rules and Listening rules settings available in Bitvise SSH Server Advanced settings, separately for each group or account settings entry. For example, you may want to allow the user to use port forwarding to access a service provided by a particular machine on the server's local network but you don't want to allow the user to use this capability to access any server on the internet, e.g. ![]() Sometimes, such simple controls are not sufficient. Disable the second and the user will not be able to instruct the SSH server to listen for connections to forward to the SSH client. Disable the first and the user will not be able to tell the SSH server to initiate outbound connections. In the Bitvise SSH Server settings entry for the account or group, there are fields Permit C2S port forwarding and Permit S2C port forwarding. If your requirements are simple, Bitvise SSH Server provides two easy ways to control a user's or group's access to tunneling. (You can learn more in our Short guide to SSH port forwarding.) Have the SSH server accept incoming TCP/IP connections on a server's interfaceĪnd port and forward those connections to the client (called server-to-client port forwarding). 'Tunneling' or 'port forwarding' refers to the ability of an SSH client (a) to have the SSH server initiate a TCP/IP connection to another server on the SSHĬlient's behalf (called client-to-server tunneling), or (b) to ![]()
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