Mosh is a SSH client server that is aware of connectivity problems of the original SSH implementation. Mosh can migrate physical connections and IP addresses while staying connected. Mosh depends on SSH.
USE flags for net-misc/mosh Mobile shell that supports roaming and intelligent local echo
emerge --ask net-misc/mosh
Each mosh client requires a free and accessible UDP port between 60000 and 61000 on the server to function.
Once the remote host has SSH running, mosh installed, and the UFT8 locale set connection is possible: