Non-Physical Features - ZyXEL Communications ZyWALL 2Plus User Manual

ZyWALL 2 Plus User's Guide
Time and Date
The ZyWALL allows you to get the current time and date from an external server when you
turn on your ZyWALL. You can also set the time manually.
Reset Button
Use the reset button to restore the factory default password to 1234; IP address to 192.168.1.1,
subnet mask to 255.255.255.0 and DHCP server enabled with a pool of 32 IP addresses
starting at 192.168.1.33.

1.2.1 Non-Physical Features

Transparent Firewall
Transparent firewall is also known as a bridge firewall. The ZyWALL can act as a bridge and
still have the capability of filtering and inspecting the packets between a router and the LAN,
or two routers. You do not need to change your existing network configuration.
SIP Passthrough
The ZyWALL includes a SIP Application Layer Gateway (ALG). It allows VoIP calls to pass
through NAT by examining and translating IP addresses embedded in the data stream. Use the
ALG screen to enable or disable the SIP ALG.
STP (Spanning Tree Protocol) / RSTP (Rapid STP)
When the ZyWALL is set to bridge mode, (R)STP detects and breaks network loops and
provides backup links between switches, bridges or routers. It allows a bridge to interact with
other (R)STP -compliant bridges in your network to ensure that only one path exists between
any two stations on the network.
Bandwidth Management
Bandwidth management allows you to allocate network resources according to defined
policies. This policy-based bandwidth allocation helps your network to better handle real-time
applications such as Voice-over-IP (VoIP).
IPSec VPN Capability
Establish a Virtual Private Network (VPN) to connect with business partners and branch
offices using data encryption and the Internet to provide secure communications without the
expense of leased site-to-site lines. The ZyWALL VPN is based on the IPSec standard and is
fully interoperable with other IPSec-based VPN products.
46 Chapter 1 Getting to Know Your ZyWALL