description-logo 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-logoAffected Products

STUN

Impact logoImpact

Unexpected network communication

Technology

Browser-Based, Network-Protocol, Client-Server, Peer-to-Peer, Cloud-Based, Mobile-Device

Behavior

  • Reasonable

Default Ports

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

Version Updates

Date Version Detail
2023-10-05 25.651 Sig Added