The synocli-net package provides some network related tools to advanced Linux users:

• nmap
  Nmap ("Network Mapper") is a free and open source utility for network discovery and security auditing. [GPLv2]
• tmux
  tmux is a terminal multiplexer, it enables a number of terminals or windows to be accessed and controlled from a single terminal. tmux is intended to be a simple, modern, BSD-licensed alternative to programs such as GNU screen. [BSD]
• screen
  Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. [GPLv2]
• sshfs
  sshfs is a network filesystem client to connect to SSH servers. [GPLv2]
• mosh
  Mosh: the mobile shell. [GPLv3+]
• socat
  socat - Multipurpose relay (SOcket CAT). Socat is a command line based utility that establishes two bidirectional byte streams and transfers data between them. Because the streams can be constructed from a large set of different types of data sinks and sources, and because lots of address options may be applied to the streams, socat can be used for many different purposes. [GPLv2]
• fritzctl
  fritzctl is a command line client for the AVM FRITZ!Box primarily focused on the AVM Home Automation HTTP Interface. [MIT]

As requirement, enable SSH service to gain access to your system.