<![CDATA[PC NAT Type Moderate to Open]]>In System / Advanced / Firewall& NAT I have "NAT Reflection mode for port forwards" set to Pure NAT and "Enable automatic outbound NAT for Reflection" checked.

In Firewall / NAT / Outbound I have "Hybrid Outbound NAT rule generated" selected with the following mapping:

  • Interface WAN, address family IPv4+IPv6, protocol any, source is set to Windows 10 PC alias / 32, static port checked.

I keep getting NAT type moderate and I'm trying to get it to NAT type open. Windows sometimes would say Teredo could not be qualified, so I used CLI to change the type and various settings:

Teredo Parameters
---------------------------------------------
Type                    : natawareclient
Server Name             : win1910.ipv6.microsoft.com.
Client Refresh Interval : 30 seconds
Client Port             : unspecified
State                   : qualified
Client Type             : teredo client
Network                 : unmanaged
NAT                     : restricted (port)
NAT Special Behaviour   : UPNP: No, PortPreserving: Yes
Local Mapping           : XX.XX.XX.XX:60086
External NAT Mapping    : XX.XX.XX.XX:60086

My ISP does not use IPv6 natively (WAN IP is IPv4 only). I also tested using a fresh Windows 10 VM connected directly to modem and got an open NAT type. UPnP is disabled and would prefer not to enable it.

]]>https://forum.netgate.com/topic/177325/pc-nat-type-moderate-to-openRSS for NodeSat, 16 May 2026 14:05:38 GMTTue, 24 Jan 2023 23:05:26 GMT60<![CDATA[Reply to PC NAT Type Moderate to Open on Sat, 04 Mar 2023 16:48:42 GMT]]>@fox-hound For me it's been COD MW2/3 that have always been the most difficult to handle. Before I upgraded to 22.05 (2.7.0) I never got more than Moderate NAT without using UPnP AND port forward of 3074. If I'm not mistaken I also had to use static ports in Outgoing NAT.

Now after the upgrade, UPnP handles everything as it should...

]]>https://forum.netgate.com/post/1082949https://forum.netgate.com/post/1082949Sat, 04 Mar 2023 16:48:42 GMT<![CDATA[Reply to PC NAT Type Moderate to Open on Wed, 25 Jan 2023 22:40:11 GMT]]>Tried to see if enabling UPnP would work and I'm still getting moderate NAT type.

Disabled the port forwarding and outgoing mappings. Turned on UPnP and NAT-PMP port mapping, default deny is enabled, and used ACL for ports 1024-65535 on my Win10 device. Even 53-65535 does not work.

After rebooting my device shows in the UPnP status but still results in moderate NAT. Packet captures shows communication on port 3074. Firewall logs show 3544 was being blocked, but port forwarding that opened it up but still results in moderate NAT.

Can someone please provide insight? I've followed all the guides on this forum.

]]>https://forum.netgate.com/post/1082330https://forum.netgate.com/post/1082330Wed, 25 Jan 2023 22:40:11 GMT