Remediation Steps

Follow the steps below to remediate this finding on Linux (Debian/Ubuntu).

Disable and remove the Telnet server:

sudo systemctl stop telnet.socket inetd 2>/dev/null
sudo systemctl disable telnet.socket inetd 2>/dev/null
sudo apt purge telnetd telnetd-ssl xinetd 2>/dev/null

Ensure SSH is installed and accessible as the encrypted alternative:
```
sudo apt install openssh-server
sudo systemctl enable --now ssh
```
Verify Telnet port (23) is blocked in the firewall:
```
sudo ufw deny 23
```