Install Instructions

Infinet Wireless: Technical Documentation – InfiMAN Evolution
25 https://wiki.infinetwireless.com/display/DR/IP
Operation & Administration – 118
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IGMP Snooping parameter Description
Source IP Set the IP address of the IGMP querier
By default, this is 0.0.0.0
Interval Set the IGMP querier send interval (in seconds)
22 Table - IGMP Snooping
7.3.6 IP Firewall menu
IPFirewall is a mechanism of filtering packets crossing anIP
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network node, according to different criteria. System
administrator may define a set of incoming filters and a set of outgoing filters. The incoming filters determine which
packets may be accepted by the node. The outgoing filters determine which packets may be forwarded by the node
as a result of routing. Each filter describes a class of packets and defines how these packets should be processed
(reject and log, accept, accept and log).
Packets can be filtered based on the following criteria:
Protocol (IP,TCP,UDP,ICMP,ARP)
Source address and/or destination address (and port numbers forTCPandUDP)
The inbound network interface
Whether the packet is aTCP/IPconnection request (a packet attempting to initiate aTCP/IPsession) or not
Whether the packet is a head, tail or intermediateIPfragment
Whether the packet has certainIPoptions defined or not
TheMACaddress of the destination station or of the source station.
The figure below illustrates how packets are processed by the filtering mechanism of the router:
There are two classes (sets) of filters - prohibiting (reject) and permitting (accept).
Furthermore, a filter may be applied to all inbound packets or only to packets arriving via a specific interface. Each
received packet is checked against all filters in the order they are put in the set.
The first filter that matches the received packet determines how the packet are treated. If the filter is an accept
filter, the packet is accepted, otherwise it is rejected. If the packet matches no filter in the set, or if the set is empty,
the packet is accepted.
Packet filtering rules
Every packet entering a router passes through a set of input filters (blocking filters). The packets accepted by the
input filter set are further processed by theIPlayer of the router kernel. If theIPlayer determines that the packet
should go further and not landing here, it hands the packet to the set of outgoing filters (forwarding filters).
Information on packets rejected by any filter is displayed on the operator’s terminal and the packets themselves are
discarded without any notice to their sender.
NOTE
The rejected packet are discarded without notification to the sender.
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