Port 1701 — L2TP

Q: What is harbour 1701 for?

VPN. The protocol or service generally associated is L2TP.

Q: Transport ProtocolUDPSafety precautionsL2TP alone does not provide the expected level of security: use IPsec.Should we open this port in the Burt?

Only if a service is actually needed l, use it. Apply the principle of any privilege: limit the authorized sources, destinations and interfaces, and then log connections when relevant.

Q: How do I check this port?

Test-NetConnection SERVER -Port 1701Under Linux, you can use nc -vz SERVER 1701.

TopicFortiGate →

View my favorites

Port1701

TransportUDP

ServiceL2TP

Port 1701UDP

Tunneling L2TP, usually combined with IPsec.

What is harbour 1701 for?

VPN. The protocol or service generally associated is L2TP.

Transport Protocol

UDP

Safety precautions

L2TP alone does not provide the expected level of security: use IPsec.

Should we open this port in the firewall?

Only if a service is actually needed the use it. Apply the principle of any privilege: limit the authorized sources, destinations and interfaces, and then log connections when relevant.

How do I check this port?

Test-NetConnection SERVER -Port 1701

Under Linux, you can use nc -vz SERVER 1701.

Port/service associations are common conventions. An application can be configured on another port.