You need to connect to a server with sshd running on it on a non default port
It is relatively easy to connect to a non default port, you just add -p followed by the portnumber to connect.
ssh -X -l username -p 2345 10.10.119.20
the -p 2345 is the non default port you have running the sshd daemon on.
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.