Unsupported global request type no-more-sessions@openssh.com

[jaksi]

This is an OpenSSH-specific global request. It is supposed to prevent future session channels from being open.
From the OpenSSH protocol documentation:

On receipt of such a message, an OpenSSH server will refuse to open future channels of type "session" and instead immediately abort the connection.

This is not directly useful to get more data from and information about clients (attackers), but it would get us a bit closer to how OpenSSH server behaves and might convince clients to engage.