ETHERLINE
®
ACCESS NF04T | Version 1 | 04/16/20
27
6.9
NAPT
“NAPT for LAN to WAN traffic” replaces the sender addresses of queries from the LAN with the ETHERLINE
®
ACCESS NF04T WAB IP address.
The option “
NAPT: Active
” thus enables communication of devices from the LAN with devices in the WAN.
ETHERLINE
®
ACCESS NF04T thereby acts as a gateway to administer the implementation to the IP addresses of the
WAN network and looks after the assignment of the response.
In order that the communication with activated NAPT from the LAN to WAN functions, ETHERLINE
®
ACCESS NF04T
LAN IP address must be set as a default gateway for every device connected to LAN.
If the
NAPT
option is deactivated, the query packets from the LAN are forwarded from the LAN to the WAN with
their original sender IP and sender port.
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
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
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
3
4
5
6
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
P4 LAN
P1 WAN
P2 LAN
P3 LAN
Ext. V DC
18 ... 30 V
+ FE IN1 IN2
–
FCN
RST
PWR
RDY
ACT
USR
ETHERLINE
®
ACCESS
NAT/FIREWALL
10.10.1.1
192.168.10.200
Source 192.168.10.1:80
Source IP 10.10.1.1:xxx
