tsshd

The tsshd works like mosh-server, while the tssh --udp works like mosh.

Advantages

• Low Latency ( based on QUIC / KCP )

• Port Forwarding ( same as openssh, includes ssh agent forwarding and X11 forwarding )

• [TODO] Connection Migration ( supports network switching and reconnection, depends on quic-go#234 )

How to use

1. Install tssh on the client ( the user's machine ).

2. Install tsshd on the server ( the remote host ).

3. Use tssh --udp to login to the server. Configure as follows to omit --udp:

   Host xxx
      #!! UdpMode yes
      #!! TsshdPath ~/go/bin/tsshd

How it works

• The tssh plays the role of ssh on the client side, and the tsshd plays the role of sshd on the server side.

• The tssh will first login to the server normally as an ssh client, and then run a new tsshd process on the server.

• The tsshd process listens on a random udp port between 61000 and 62000, and sends its port number and a secret key back to the tssh process over the ssh channel. The ssh connection is then shut down, and the tssh process communicates with the tsshd process over udp.

• The tsshd supports QUIC protocol and KCP protocol (the default is QUIC), which can be specified on the command line (such as -oUdpMode=KCP), or configured as follows:

  Host xxx
    #!! UdpMode KCP

Installation

• Install with apt on Ubuntu

  sudo apt install tsshd

  ```sh sudo apt update && sudo apt install software-properties-common sudo add-apt-repository ppa:trzsz/ppa && sudo apt update sudo apt install tsshd ```

• Install with apt on Debian

  sudo apt install tsshd

  ```sh sudo apt install curl gpg curl -s 'https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x7074ce75da7cc691c1ae1a7c7e51d1ad956055ca' \ | gpg --dearmor -o /usr/share/keyrings/trzsz.gpg echo 'deb [signed-by=/usr/share/keyrings/trzsz.gpg] https://ppa.launchpadcontent.net/trzsz/ppa/ubuntu jammy main' \ | sudo tee /etc/apt/sources.list.d/trzsz.list sudo apt update sudo apt install tsshd ```

• Install with yum on Linux

  sudo yum install tsshd

  - Install with [gemfury](https://gemfury.com/) repository. ```sh echo '[trzsz] name=Trzsz Repo baseurl=https://yum.fury.io/trzsz/ enabled=1 gpgcheck=0' | sudo tee /etc/yum.repos.d/trzsz.repo sudo yum install tsshd ``` - Install with [wlnmp](https://www.wlnmp.com/install) repository. It's not necessary to configure the epel repository for tsshd. ```sh curl -fsSL "https://sh.wlnmp.com/wlnmp.sh" | bash sudo yum install tsshd ```

• Install with yay on ArchLinux

  yay -S tsshd

  ```sh yay -Syu yay -S tsshd ```

• Install with Go ( Requires go 1.21 or later )

  go install github.com/trzsz/tsshd/cmd/tsshd@latest

  ```sh go install github.com/trzsz/tsshd/cmd/tsshd@latest ``` The binaries are usually located in ~/go/bin/ ( C:\Users\your_name\go\bin\ on Windows ).

• Build from source ( Requires go 1.21 or later )

  sudo make install

  ```sh git clone --depth 1 https://github.com/trzsz/tsshd.git cd tsshd make sudo make install ```

• Download from the GitHub Releases, unzip and add to PATH environment.

Contact

Feel free to email the author lonnywong@qq.com, or create an issue. Welcome to join the QQ group: 318578930.

Sponsor

❤️ Sponsor trzsz ❤️, buy the author a drink 🍺 ? Thank you for your support!