NAT_S615
Entry ID: 109744660, V1.1, 08/2017
Siemens AG All rights reserved
Remarks
Address translation using NAT has already been performed before the firewall;
consequently, the firewall must use the translated addresses.
From the PC’s (or STEP 7’s) perspective, the two CPUs can be accessed
using the IP address 192.168.1.2 or 192.168.1.3.
To fully enable VLAN2 for access to the CPU, change the firewall rule and the
NAT rule for the source as follows: 192.168.1.0/24.
For a single CPU, NAPT could also be used (see Chapter 2.2).
NETMAP always translates x addresses to x other addresses, which is also
called 1:1 NAT.
The "Trans.Destination IP Subnet” columns in the SCALANCE S615 may only
be configured with a single IP address – /32. Only then does the SCALANCE
S615 reply to ARP requests for the additional IP addresses.
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