ZyXEL Communications ZyXEL ZyWALL P1, User Manual

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ZyWALL P1 User’s Guide
Chapter 1 Getting to Know Your ZyWALL 33
Firewall
The ZyWALL is a stateful inspection firewall with DoS (Denial of Service) protection. By
default, when the firewall is activated, all incoming traffic from the WAN to the LAN is
blocked unless it is initiated from the LAN. The ZyWALL firewall supports TCP/UDP
inspection, DoS detection and prevention, real time alerts, reports and logs.
Universal Plug and Play (UPnP)
Using the standard TCP/IP protocol, the ZyWALL and other UPnP-enabled devices can
dynamically join a network, obtain an IP address and convey its capabilities to other devices
on the network.
PPPoE
PPPoE facilitates the interaction of a host with an Internet modem to achieve access to high-
speed data networks via a familiar "dial-up networking" user interface.
PPTP Encapsulation
Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables secure transfer of
data from a remote client to a private server, creating a Virtual Private Network (VPN) using a
TCP/IP-based network.
PPTP supports on-demand, multi-protocol and virtual private networking over public
networks, such as the Internet. The ZyWALL supports one PPTP server connection at any
given time.
Dynamic DNS Support
With Dynamic DNS (Domain Name System) support, you can have a static hostname alias for
a dynamic IP address, allowing the host to be more easily accessible from various locations on
the Internet. You must register for this service with a Dynamic DNS service provider.
IP Multicast
Deliver IP packets to a specific group of hosts using IP multicast. IGMP (Internet Group
Management Protocol) is the protocol used to support multicast groups. The latest version is
version 2 (see RFC 2236); the ZyWALL supports both versions 1 and 2.
Static Route
Static routes tell the ZyWALL routing information that it cannot learn automatically through
other means. This can arise in cases where RIP is disabled on the LAN or a remote network is
beyond the one that is directly connected to a remote node.