<![CDATA[[SOLVED] NATed device detected as duplicate node]]>I have a zone that contains:
1x Linux node which is NATed and reached through a port forward on below firewall.
1x firewall on edge
8x switches that use the Linux node as proxy for SNMP/ICMP/etc.

Linux node and switches are being monitored just fine.

I cannot add firewall by public IP because the IP conflicts with the Linux node and duplicate add is prevented.
I can add the firewall with its private IP, but then some hours later, NetXMS deletes it when it realises that the firewall's outside IP is detected as a duplicate of the Linux node.

I could have sworn I'd succeeded at this in the past. I would think it's a fairly common configuration. Do I need to do something "special" to the Linux node to prevent the duplicate detection?

]]>https://forum.netxms.org/topic/7715/solved-nated-device-detected-as-duplicate-nodeRSS for NodeFri, 13 Nov 2026 09:20:28 GMTTue, 18 Jul 2023 10:05:57 GMT60<![CDATA[Reply to [SOLVED] NATed device detected as duplicate node on Thu, 17 Aug 2023 16:10:00 GMT]]>Yes, that worked.

]]>https://forum.netxms.org/post/32681https://forum.netxms.org/post/32681Thu, 17 Aug 2023 16:10:00 GMT<![CDATA[Reply to [SOLVED] NATed device detected as duplicate node on Tue, 15 Aug 2023 10:38:04 GMT]]>Thanks, I've ticked that, re-added the firewall and will wait to see what happens...

]]>https://forum.netxms.org/post/32678https://forum.netxms.org/post/32678Tue, 15 Aug 2023 10:38:04 GMT<![CDATA[Reply to [SOLVED] NATed device detected as duplicate node on Sat, 05 Aug 2023 20:10:14 GMT]]>In node properties -> Communicaitons there is checkbox "Communication through external gateway". If set, NetXMS will know that this is a forwarded port.

]]>https://forum.netxms.org/post/32638https://forum.netxms.org/post/32638Sat, 05 Aug 2023 20:10:14 GMT