Cautions With Upnp And Nat-Pmp; Upnp Screen - ZyXEL Communications ZyWall ATP series User Manual

15.2.2 Cautions with UPnP and NAT-PMP

The automated nature of NAT traversal applications in establishing their own services and opening
security policy ports may present network security issues. Network information and configuration may
also be obtained and modified by users in some network environments.
When a UPnP or NAT-PMP device joins a network, it announces its presence with a multicast message.
For security reasons, the Zyxel Device allows multicast messages on the LAN only.
All UPnP-enabled or NAT-PMP-enabled devices may communicate freely with each other without
additional configuration. Disable UPnP or NAT-PMP if this is not your intention.

15.3 UPnP Screen

Use this screen to enable UPnP and NAT-PMP on your Zyxel Device.
Click Configuration > Network > UPnP to display the screen shown next.
Figure 241 Configuration > Network > UPnP
Chapter 15 UPnP
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