Forwarding Filtering - Advantech ER75s User Manual

Then there is a table for defining the rules. It is possible to allow all traffic within the selected
protocol (rule specifies only protocol) or create stricter rules by specifying items for source IP
address, destination IP address and port.
Item
Source
Destination
Protocol
Target Port
Action
There is also the possibility to drop a packet whenever request for service which is not in
the router comes (check box named Enable filtering of locally destinated packets). The packet
is dropped automatically without any information.
As a protection against DoS attacks (this means attacks during which the target system
is flooded with plenty of meaningless requirements) is used option named Enable protection
against DoS attacks which limits the number of connections per second for five.
Description
IP address of source device
IP address of destination device
Specifies protocol for remote access:
all – access is enabled for all protocols
TCP – access is enabled for TCP protocol
UDP – access is enabled for UDP protocol
ICMP – access is enabled for ICMP protocol
The port number on which access to the router is allowed
Type of action:
allow – access is allowed
deny – access is denied
Table 33: Forwarding filtering
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ER75s