TCP 4100
Synopsis
- WatchGuard Firebox Mobile VPN with IPSec uses TCP port 4100 for IKE over TCP, allowing VPN clients to connect when UDP 500/4500 or ESP are blocked by NAT/firewalls.
- WatchGuard’s Mobile VPN client software (Windows/macOS) and compatible third‑party IPsec clients can be configured to connect to Firebox appliances on TCP 4100 for this purpose.
Observed activity
Last 30 days
Detailed chart