STUN

Description

This indicates an attempt to use the STUN protocol.
Session Traversal Utilities for NAT (STUN) is a lightweight protocol that allows an end host to discover its IP address and port allocated to it by a NAT. It allows NAT traversal for applications like voice calls, video calls, messaging, and other communications.

Affected Products

STUN

Impact

Unexpected network communication

Technology

Network-Protocol

Behavior

• Reasonable

Default Ports

• TCP/443
• TCP/3478
• TCP/5349
• UDP/1024-65535

References

• http://tools.ietf.org/html/rfc5389
• http://www.ietf.org/rfc/rfc3489.txt
• https://datatracker.ietf.org/doc/html/rfc8489