My case I had to to do this for PI Node. If the port forwarding correct on the router side then on the Firewall options you need to add the application what would use those ports and set to allow incoming connections. That is what I have done and it worked.
Remove two checkboxes from Security Options (see picture below) and click on the “ADD” button. The system will create and start the tunnel automatically. In the “Connection properties” column, you can see the URL pointing to your local Minecraft server. By clicking on the URL system will copy it to your clipboard. Here is a list of some common iptables options: -A --append – Add a rule to a chain (at the end). -C --check – Look for a rule that matches the chain’s requirements. -D --delete – Remove specified rules from a chain. -F --flush – Remove all rules. -I --insert – Add a rule to a chain at a given position. Norton™ provides industry-leading antivirus and security software for your PC, Mac, and mobile devices. Download a Norton™ 360 plan - protect your devices against viruses, ransomware, malware and other online threats. If there's an app you need to use that's being blocked, you can allow it through the firewall, instead of turning the firewall off. Note: If you get errors, or if the setting won't turn on, you can use the troubleshooter and then try again. Click on Firewall Options (you may need to click on the lock and type in your password to do this) Scroll down and see if you have the app "screensharingd" listed If so click on it and click the minus button to delete it from the list 2lhXmS.
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  • do i need firewall on mac