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.
Aug 24, 2015 How to Enable SSH on Ubuntu (18.04, 17.04, 16.04, 14.04 Jul 11, 2018 tcp - How to connect ssh from a specified port? - Unix A simple solution for this if you are port forwarding through your router is to set the inbound port to whatever you want and the local port to 22. Your machine will still be taking ssh connection on 22 like normal but to actually connect from outside your network you would use your inbound port. Port Checker - Check Open Ports Online
How to SSH on a port other than 22 - Ask Ubuntu
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The SSH server must be configured to allow port forwarding. By default, port forwarding is allowed. You can control this behavior by using the AllowTCPForwarding option. To allow SSH Forwarding, open the SSH daemon configuration file (usually /etc/ssh/sshd_config) and add or modify the following line. AllowTCPForwarding yes. To denied forwarding:
But you can go the other way. If you have your friend open an ssh connection to your machine, and port forward the ssh port, then you can ssh back through his tunnel to his machine. This gives you an ssh connection to his machine that will only survive as long as his ssh to you, (complete with port forwarding), remains. Authorizing inbound traffic for your Linux instances To open a port for inbound traffic, add a rule to a security group that you associated with your instance when you launched it. To connect to your instance, you must set up a rule to authorize SSH traffic from your computer's public IPv4 address. A Guide to SSH Port Forwarding/Tunnelling - Boolean World Jul 06, 2017 How do I create a SSH tunnel (Port Forwarding) in PuTTY to Nov 07, 2019