Advantech EKI-6333AC-2GD Series, Руководство пользователя

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EKI-6333AC-2GD Series User Manual 51
3.5.2 NAT
Network Address Translation (NAT) allows the device to provide an agent function
between the public network (Internet) and the private network (local). This allows a
single unique IP address to represent a group of connected devices access to the
external network.
By the same token, when a packet enters the domain, NAT translates the external
(public) unique address into a private local address.
Figure 3.43 NAT Diagram
3.5.3 Forwarding
3.5.3.1 Port Forwarding
Port forwarding, also known as port mapping, allows for the application of network
addresses (NAT) the redirection of a communication request from an address and
port to a specified address while the packets traverse the firewall.
The function are designed for networks hosting a specific server, such as a web
server or mail server, on the private local network and behind the NAT firewall.
Figure 3.44 Port Forwarding
Host A
192.168.1.100/24
Server Router
Host B
192.168.1.101/24
Host C
192.168.1.102/24
Host C
Host B
192.168.1.102/24
Internet
EKI-6333AC-2GD
2.4
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2.4
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PW
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LA N1
LA
N2
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Ethernet
NB/PC
http Server
192.168.1.10
Port 80
214.12.22.30:80~82
Port 21
214.12.22.30:21
Port 22
214.12.22.30:22
FTP Server
192.168.1.20
SSH Server
192.168.1.30
Internet
p p S Server
2.168.1.10
t 80
rt 21
.168.1.20
ht ht ht tp tp
192
P P Se Server
168 1 20
t 22
SS SS
192.168.1.30
192.
S S H H Se Server
2 168 1 30
F FT FT FT P P P
192
EKI-6333AC-2GD
2.4
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Hz
2.4 /5G
Hz
PW
R
LA
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LA
N2
2.4 GH
Z
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