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The real world used of X11 Forwarding and SSH

https://goteleport.com/blog/x11-forwarding/

X11 forwarding, ssh -X, is an SSH protocol that enables users to run graphical applications on a remote server and interact with them using their local display and I/O devices. It is commonly relied upon by developers for securely interacting with remote machines across wide and heterogeneous server fleets.

Here at Teleport we recently added X11 Forwarding to our list of supported SSH protocols. As we implemented it, we began to realize that despite its common usage, there are very few sources which accurately explain how X11 Forwarding works. In this blog post, I'll share some insights to answer common questions about X11 and X11 forwarding, as well as cover the security implications associated with X11 Forwarding that any user would benefit from understanding.