Advantech ER75s, Руководство пользователя

Страница: 57 / 107

ER75s
Figure 37: Backup Routes
Item Description
Source IP address from which access to the router is allowed
Protocol 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
Target Port The port number on which access to the router is allowed
Action Type of action:
•
allow – access is allowed
•
deny – access is denied
Table 32: Filtering of incoming packets
The following part of the configuration form defines the forwarding policy. If Enabled filter-
ing of forwarded packets item is not checked, packets are automatically accepted. If this item
is checked and incoming packet is addressed to another network interface, it will go to the
FORWARD chain. In case that the FORWARD chain accepted this packet (there is a rule for
its forwarding), it will be sent out. If the forwarding rule does not exist, packet will be dropped.
49