Tag: endlessh

  • Stop SSH bruteforce with endlessh

    Endlessh is an open source SSH trapit. It send slow random banner string to attacker, wasting their time.

    Before you install endlessh, you need to change your SSH port to a higher non default port. To do this edit 

    vi /etc/ssh/sshd_config

    Find 

    Port 22

    Replace with

    Port YOUR_NEW_PORT_HERE

    If the line is commented with #, uncomment it.

    Now you can install endlessh with

    cd /usr/local/src
git clone https://github.com/skeeto/endlessh
cd /usr/local/src/endlessh
make
cp endlessh /usr/local/bin
cp /usr/local/src/endlessh/util/endlessh.service /etc/systemd/system/

    By default endlessh run on port 2222. To change it to port 22, edit file

    vi /etc/systemd/system/endlessh.service

    Find

    #AmbientCapabilities=CAP_NET_BIND_SERVICE

    Replace with

    AmbientCapabilities=CAP_NET_BIND_SERVICE

    Find

    PrivateUsers=true

    Replace with

    #PrivateUsers=true

    Run

    setcap 'cap_net_bind_service=+ep' /usr/local/bin/endlessh

    Create endlessh configuration file

    vi /etc/endlessh/config

    Add following content

    Port 22
Delay 10000
MaxLineLength 32
MaxClients 4096
LogLevel 0
BindFamily 0

    If you need to enable log, set LogLevel to 1.

    Enable and restart endlessh

    systemctl enable endlessh
systemctl start endlessh