CalAmp Dataradio Sentry 4G 900 User Manual page 34

Metric: This sets the priority of the routes compared to other static routed defined. The
lower the number, the higher priority the route.
Click on "Add" when all necessary information has been entered. The route will be shown on
the bottom of the screen (under Static Routing Table). Additional routes can be added
provided they have a unique Route no, name and metric. Routes can be deleted by clicking
the Delete Entry option of the desired entry.
Note:
Routing table (found under "Routing Table" tab) shows all routes, while Static Table
(found under "Static Routing" tab) shows manually entered routes only.
IP Filtering
5.6.2
IP Filtering provides certain Internet firewall protection. The user can enter up to 20 IP filters. Each
IP filter is identified by a unique number (from 1 to 20). When IP filtering is enabled, any custom IP
filter entered by the user as well as predefined IP filters will be taken into account when processing
IP packets. See Figure 20.
An IP packet passes through the filtering logic when IP filtering is enabled:
1) An IP packet is received on one of the interface and is destined to the Sentry 4G unit
OR
2) An IP packet is sent by the Sentry 4G unit
OR
3) An IP packet is forwarded by the Sentry 4G unit.
5.6.2.1 Predefined IP Filters
Drop Remote Pings: If IP filtering is enabled, any ICMP echo request coming from the WAN
interface will not be replied to. This prevents remote hosts from detecting your IP address on the
WAN.
Drop Remote IP Fragments: If IP filtering is enabled, any fragmented IP packets coming from the
WAN interface will be dropped.
Drop Invalid Packets: If IP filtering is enabled, any invalid packet received by the unit will be
silently dropped. An invalid IP packet is one that cannot be identified.
5.6.2.2 Add Custom IP Filters
Fill in the parameters described below and click "Add...". Your entry should appear in the Custom
IP Filters table on the bottom of the page.
Note: Criteria are for inclusion by default. Select "exclude" if your criterion is for exclusion.
Filter Number: Each IP filter is identified by a unique number from 1 to 20
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CONFIGURATION
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Sentry 4G 900 TM User Manual