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Knowledge base/Troubleshooting NAT Reflection

AZTCOFW / TECHNICAL GUIDE

Troubleshooting NAT Reflection

Troubleshooting

If an improperly specified NAT Port Forward exists it can cause problems when NAT Reflection is enabled.

The most common way this issue arises is when there is a local web server, and port 80 on the WAN is forwarded there. When NAT Reflection is enabled, any connection made to an external web site comes up as the internal web site instead.

To fix this, edit the NAT Port Forward for the offending port, and change External Address to *Interface Address*

instead of any.

If an external address of “any” is absolutely required, then NAT Reflection will not be possible on this firewall and

Split DNS must be used instead.

Imported from the AZTCOFW knowledge base on 2026-09-05. Historical guidance may refer to older software versions. Confirm applicability before changing a production system.

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