Users who are mindful of security may actively manage their firewall. Most personal computers have built-in firewalls. If network reconfiguration isn't possible, see the section "Screen sharing through a browser." To ensure the firewall changes were made, reload the rules: $ sudo firewall-cmd -reload add-rich-rule='rule family="ipv4" source address="93.184.216.34" service name=vnc-server accept' For example, using an example IP address of 93.184.216.34, a rule to allow VNC traffic is: $ sudo firewall-cmd \ If you're not comfortable allowing all VNC traffic into the network, add a rich rule to firewalld in order to let in VNC traffic from only your IP address. $ sudo firewall-cmd -add-service=vnc-server -zone=example-zone If the network firewall is on a Linux server you can access, you can broadly allow VNC traffic to pass through using firewall-cmd, first by getting your active zone, and then by allowing VNC traffic in that zone: $ sudo firewall-cmd -get-active-zones The most common, and most universal, protocol for screen sharing is VNC. In order to pass through the firewall and access a computer remotely, your network firewall must be configured so that the appropriate port for the remote desktop protocol you're using is accessible.
Barrier 1: The network firewallĪ network firewall is the target computer's LAN entry point, often a part of the router (whether an appliance from an Internet Service Provider or a dedicated server in a rack). Every network and every computer is configured uniquely, but here are some possible solutions.
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Specific instruction on how to get past each barrier is impossible. Usually, there are up to 3 blockades for accessing a remote machine: It should be difficult to get into a computer without explicit consent. Half the battle of successfully screen sharing is getting into the target computer. If you need to see the desktop of a computer that you're not physically in front of, there are plenty of tools for the job. Linux is famously capable of being managed without seeing a GUI, but that doesn't mean you have to manage your box that way. Likewise, anyone who's ever maintained a server located in a loud and chilly data center-or across town, or the world-knows that often a remote viewer is the easiest method for viewing distant screens. Linux System Administration Skills AssessmentĪnyone who's worked a support desk has had the experience: sometimes, no matter how descriptive your instructions, and no matter how concise your commands, it's just easier and quicker for everyone involved to share screens.
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