System information

221 02-FGB 101 544 Uen A – September 2008 23
5 Data Features
5.1 Layer 2 Functions
5.1.1 L2TP
The W3x terminals support one L2TP tunnel. The LAN/WLAN is bridged
into the tunnel using the BCP (Bridging Control Protocol). See also section
5.2.7 – L2TP Tunneling.
5.1.2 Bridging LAN and WLAN
The W3x terminals support bridging/switching traffic between the LAN and
WLAN interfaces.
5.1.3 WLAN Whitelist
The W3x terminals support WLAN whitelist, also known as “MAC
Association Control” or “MAC Access List”. Up to 20 WLAN MAC
addresses can be added to the list and the use of the whitelist is possible to
enable/disable.
5.2 Internet Protocol Services
The Internet Services in the W3x terminals are based on the Internet
Protocol version 4 (IPv4).
5.2.1 IP Forwarding
The W3x terminals support IP forwarding and employs ingress traffic
filtering on both the LAN and the WAN interfaces.
5.2.2 Static Routing
The W3x terminals support destination based static routing. Static routes
can be added to the routing table to ensure packets are forwarded to their
correct destination.
5.2.3 DNS
The W3x terminals include a DNS proxy server which responds to DNS
requests from the local LAN/WLAN. It contains a small database of local
host names and addresses supplied by client DHCP requests.
In addition it also caches requests to remote DNS servers.
5.2.4 DHCP Server
The W3x terminals include a DHCP server for LAN/WLAN interfaces.
The DHCP server maintains a pool of IP addresses and distributes them to
LAN/WLAN hosts whenever they are switched on. It also puts the
hostname, supplied by the client DHCP request, in the local DNS proxy.