ZyXEL Communications 70 Series - Manual (Page 56)

ZyWALL 5/35/70 Series User’s Guide
Chapter 1 Getting to Know Your ZyWALL 56
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. The Real Time Chip (RTC) keeps
track of the time and date.
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.
Dual PCMCIA and CardBus Slot
The dual PCMCIA and CardBus slot provides the option of a wireless LAN. You can
alternatively insert a ZyWALL Turbo Card to use the anti-virus and IDP features.
IEEE 802.11 b/g Wireless LAN
The optional wireless LAN card provides mobility and a fast network environment for small
and home offices. Users can connect to the local area network without any wiring efforts and
enjoy reliable high-speed connectivity.
1.2.2 Non-Physical Features
Load Balancing
The ZyWALL improves quality of service and maximizes bandwidth utilization by dividing
traffic loads between the two WAN interfaces (or ports).
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 do any other changes to your existing network.
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.