Gembird NSW-R4 - Manual (Page 30)

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NSW-R4 WIRELESS BROADBAND ROUTER, 300M
Ping Access on WAN: allows or blocks the Ping WAN interface.
IGMP Proxy: IGMPproxy is a simple dynamic Multicast Routing Daemon
using only IGMP signaling. It's intended for simple forwarding of Multicast
traffic between networks.
Web Server Access on WAN: allow or blocks access to the Web Server
from WAN interface.
VPN pass through: allows or blocks the VPN Pass through the router
NAT.
4.3.2 Access Control
You can set up some rules, for example MAC filter, IP filter, URL filter
and Port filter. You can also add some extra conditions for these rules (the
date and time), but then you should enable the NTP-client first.
Note 1: Whenever a network packet arrives, the firewall will try to find a
suitable rule from this table. The search goes from up to down and stops
when a match has been found. Then the packet will be either forwarded or