Ubuntu Firewall Open Ports - How to Open a Port in Ubuntu

Feb 03, 2018 List of TCP and UDP port numbers - Wikipedia This is a list of TCP and UDP port numbers used by protocols of the Internet protocol suite for operation of network applications.. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) needed only one port for full-duplex, bidirectional traffic. The Stream Control Transmission Protocol (SCTP) and the Datagram Congestion Control Protocol (DCCP) also use port numbers. Port Checker - Port Forwarding Test - Open Port Checker

Then choose New Rule. This will open the New Inbound Rule Wizard. Choose a Port Rule to create, then choose TCP or UDP as the port type (see our firewall article for specific port type) Choose specific local ports, and type the number of the port you want open. After this, you can choose to allow or block the specific port.

UDP communication is blocked by the Windows Firewall rule Sep 09, 2015

Re: Opening UDP port 123 Thanks for the info. At this point, I don't think it's a problem with the firewall blocking any ports, as this hasn't been a problem in the past and at …

How to open a udp port in windows 10 - Microsoft Community