Port 1194 (UDP & TCP) — OpenVPN Tunnel
Port 1194 is the official IANA port for OpenVPN remote-access and site-to-site TLS tunnels, supporting both low-latency UDP/1194 and fallback TCP/1194.
| Port Number | 1194 |
|---|---|
| Transport Protocol | UDP & TCP |
| Primary Service | OpenVPN Tunnel |
| Standard / Specification | OpenVPN Protocol |
| IANA Port Range | Registered User Port (1024–49151) |
| Internet Exposure Risk | Public VPN concentrator port; enable tls-crypt or tls-auth HMAC packet hardening. |
Firewall Architecture & Hardening Best Practices
Always prefer UDP/1194 in production to avoid TCP-over-TCP meltdown (head-of-line blocking and stacked retransmission timers when inner TCP streams experience packet loss).
Operational Troubleshooting Note
Enable tls-crypt on UDP/1194 so unauthenticated port scanners receive zero handshake responses.
Quick CLI Connectivity & Firewall Reference
# Test TCP/1194 reachability (Linux / macOS / PowerShell) nc -zv target.example.com 1194 Test-NetConnection -ComputerName target.example.com -Port 1194 # Inspect local UDP/1194 socket binding on Linux ss -uapn | grep :1194 # Allow restricted CIDR on Linux UFW firewall ufw allow from 10.0.0.0/8 to any port 1194 proto any
Planning firewall allowlists or VPN overlays? Use our IPv4 CIDR Calculator, MTU & TCP MSS Calculator, or WireGuard AllowedIPs Generator.
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