D-Link DFL-80 User Manual - Page 130

Firewall

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Net ID = 1H9U2.B168.1.0/24 111111111112222222222233333333333444444444445555555555566666666666777777777778888888888899999999999000000000001111111111122222222222333333333334444444444455555555555666666666667777777777788888888888999999999990000000000011111111111222222222223333333333344444444444555555555556666666666677777777777888888888889999999999900000000000111111111112222222222211111111111222222222223333333333344444444444 Net ID =H19U2B.168.1.0/24 1111111111122222222222333333333334444444444455555555555666666666667777777777788888888888999999999990000000000011111111111222222222223333333333344444444444555555555556666666666677777777777888888888889999999999900000000000111111111112222222222233333333333444444444445555555555566666666666777777777778888888888899999999999000000000001111111111122222222222111111111112222222222233333333333444444444445555555555566666666666 Firewall Internal 192.168.1.1 External 210.71.253.128 DMZ 111111111112222222222233333333333144444444444055555555555.666666666667R77777777777188888888888o.999999999992u00000000000511111111111t22222222222e333333333333r.1444444444445555555555546666666666627777777777788888888888 210.71.253.130 Net ID =H1U9B2.168.1.0/24 111111111112222222222233333333333444444444445555555555566666666666777777777778888888888899999999999000000000001111111111122222222222333333333334444444444455555555555666666666667777777777788888888888999999999990000000000011111111111222222222223333333333344444444444555555555556666666666677777777777888888888889999999999900000000000111111111112222222222211111111111222222222223333333333344444444444555555555556666666666677777777777 Internet Load Balancing Load Balancing is a function that Virtual Servers provide. It allows a Virtual Server to be mapped to more than one physical server, which provides the specific service at the same time. When a Virtual Server receives data packets, it forwards the packet to the first physical server, and the next packet to the next physical server. The DFL-80 uses Least Connection for load balancing. Least Connection: Because each physical server has different processing speeds, Least Connection forwards data packets to the physical server with the least number of connections at that time. In this way, each packet can have the least waiting time, and the number of packets a server receives is proportional to its processing efficiency. Log There are flow control log and event log. Flow control log's parameters are set up the same time control policies are setup. It records details of data packets of each control policy, including data packet's start and end time, disconnect time and length of connection, source address, destination address and service content. Event log records details of the firewall's system configurations changes, including the user who made the modification, time of change, modified parameters, and IP address the user uses to logon, etc. 130

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130
Load Balancing
Load Balancing is a function that Virtual Servers provide.
It allows a Virtual
Server to be mapped to more than one physical server, which provides the
specific service at the same time.
When a Virtual Server receives data packets,
it forwards the packet to the first physical server, and the next packet to the
next physical server.
The DFL-80 uses Least Connection for load balancing.
Least Connection:
Because each physical server has different processing
speeds, Least Connection forwards data packets to the physical server with
the least number of connections at that time. In this way, each packet can have
the least waiting time, and the number of packets a server receives is proportional
to its processing efficiency.
Log
There are flow control log and event log.
Flow control log’s parameters are set
up the same time control policies are setup. It records details of data packets
of each control policy, including data packet’s start and end time, disconnect
time and length of connection, source address, destination address and service
content.
Event log records details of the firewall’s system configurations changes,
including the user who made the modification, time of change, modified
parameters, and IP address the user uses to logon, etc.
HUB
HUB
Net ID = 192.168.1.0/24
Net ID = 192.168.1.0/24
Firewall
Internal
External
192.168.1.1
210.71.253.128
DMZ
Router
210.71.253.142
210.71.253.130
Net ID = 192.168.1.0/24
HUB
Internet