Port
Port 1701 — L2TP
Port 1701 (UDP) is used by L2TP. Layer 2 Tunnelling Protocol (usually with IPsec).
Port 1701 at a glance
| Property | Value |
|---|---|
| Port number | 1701 |
| Transport | UDP |
| Service | L2TP |
| Category | Registered port |
What it is used for
Layer 2 Tunnelling Protocol (usually with IPsec).
Security considerations
Pair with IPsec for encryption.
See our full TCP/UDP port reference and learn how firewalls filter ports in the CyberOps course.
Frequently asked questions
What is port 1701 used for?
Port 1701 (UDP) is used by L2TP. Layer 2 Tunnelling Protocol (usually with IPsec).
Is port 1701 TCP or UDP?
Port 1701 uses UDP.
Is it safe to open port 1701?
Pair with IPsec for encryption.
Related
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