No response from gateway: <gateway FQDN or IP specified in connection>

This error applies to IPsec VPN connections only.

Cause

The gateway isn't responding to IKE negotiation messages. The possible causes are as follows:

  • The remote gateway (firewall or router) has been shut down.
  • The WAN address on the remote gateway isn't connected directly to the internet.

Remedy

Contact your firewall administrator and report the problem to troubleshoot further.