ETHERLINE
®
ACCESS NF04T | Version 1 | 04/16/20
26
6.7
ICMP Traffic “LAN to WAN”
With the “ICMP Traffic” option, you can generally allow the
directing of ICMP frames from the LAN to the WAN network
(“Accept”) or, depending upon the packet filters, prohibit this
(“Default Action”).
If, for example, the packet filters “Default Action” are set to
“Reject” or “Drop”, and ICMP Traffic to “Default Action”, then no ICMP frames of any kind are allowed through.
6.8
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 ETHERLINE
®
ACCESS NF04T.
Therefore, none of the LAN participants needs the ETHERLINE
®
ACCESS NF04T 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
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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
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
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
