Helmholz WALL IE, Quick Start Manual

Page: 14 / 24

Quick Start Guide WALL IE 14
6.6. NAPT
“NAPT for LAN to WAN traffic” replaces the sender addresses of queries from the
automation cell (LAN) with the address of the WALL IE (“Source NAT”) in the WAN.
If the option is deactivated, the query packets are forwarded to the WAN with their
original sender IPs.
Machine network 192.168.10.0/24
192.168.10.1 192.168.10.2 192.168.10.50 192.168.10.100
192.168.10.5
0
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7 0
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7 0
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7 0
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10.10.1.0/24
Internal (LAN)
External (WAN)
Company network
10.10.1.10 10.10.1.20
Internal IP & Port External Port
192.168.10.1:80
192.168.10.2:102
192.168.10.5:80 10.10.1.1:80
10.10.1.1:102
10.10.1.1:81
10.10.1.1
192.168.10.200
P4 LA
N
P1 WA
N
P2 LA
N
P3 LA
N
Ext. V DC
18 ... 30 V
+ FE IN1 IN2 –
FCN
RST
PWR
RDY
ACT
USR
SN:
000000000
6.5. SNAT
The function “SNAT (Source NAT)” transparently forwards incoming traffic from the
WAN side to the LAN network. All data packets sent to the LAN are sent to the IP address
of the WALL IE.
Therefore, none of the LAN participants needs the WALLIE LAN-IP as „gateway“. This is
a considerable advantage when integrating into existing network structures, since the
parameters no longer have to be changed here.
Machine network 192.168.10.0/24
192.168.10.1 192.168.10.2 192.168.10.50 192.168.10.100
192.168.10.5
0
1
2
3
4
5
6
7 0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
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4
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6
7
0
1
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7 0
1
2
3
4
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6
7
0
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4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
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5
6
7 0
1
2
3
4
5
6
7 0
1
2
3
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7
0
1
2
3
4
5
6
7 0
1
2
3
4
5
6
7
10.10.1.0/24
Internal (LAN)
External (WAN)
Company network
10.10.1.10 10.10.1.20
Internal IP & Port External Port
192.168.10.1:80
192.168.10.2:102
192.168.10.5:80 10.10.1.1:80
10.10.1.1:102
10.10.1.1:81
10.10.1.1
192.168.10.200
P4 LA
N
P1 WA
N
P2 LA
N
P3 LA
N
Ext. V DC
18 ... 30 V
+ FE IN1 IN2 –
FCN
RST
PWR
RDY
ACT
USR
SN:
000000000