Remediation Steps

Follow the steps below to remediate this finding on Linux (RHEL/CentOS/AlmaLinux).

1. Disable and remove the Telnet server:

   sudo systemctl stop telnet.socket 2>/dev/null
   sudo systemctl disable telnet.socket 2>/dev/null
   sudo yum remove telnet-server xinetd 2>/dev/null

2. Ensure SSH is running:

   sudo systemctl enable --now sshd

3. Block port 23 via firewalld:

   sudo firewall-cmd --permanent --remove-service=telnet
   sudo firewall-cmd --reload