Appendix
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10.2
1:1 NAT-Router Mode
In the 1:1 NAT Router mode, an IP address range of an internal network (at port 2) is mapped to an
IP address range of an external network (at port 1). This guarantees complete separation, e. g. of a
machine-internal network, to which participants (e. g. PLCs) can still access from the outside. The
NAT device operates protocol-independently and transports IP frames between two networks,
changing the IP header in some cases.
Fig. 79: 1:1 NAT mode
