Traceroute: !A (Administratively prohibited)

How to fix !A (Administratively prohibited) error in traceroute

The !A response stands for Administratively prohibitedand it means that the system administrator for your network has blocked the traceroute at a certain point. This is usually caused by a firewall.

Disable the firewall

On Windows systems

Disable the firewall on your Windows system:

  1. Search for firewall.
  2. Open the Windows Defender Firewall.
  3. Click Turn Windows Defender Firewalloff.
  4. Select Turn off Windows Defender Firewallfor private and public network.
  5. Click OKto save changes.

Windows disable firewall