In trying to troubleshoot some of the download performance issues I mentioned here:
https://www.dslreports.com/forum/r31305887-Gigapower-downloads-unusably-slow-without-VPN
I've found that when DMZ+ is enabled on my 5268, servers in my lab running Windows Server 2016 are not able to get more than 70mbit downloads from speedtest.net or AT&T's speed test site. If I disable DMZ+, meaning my EdgeRouter gets a private IP on the wan interface, then the download performance is normal. In either configuration, non-server OSs (Windows 10, Windows 7, MacOS, etc) behave normally.
To try to convey the issue more clearly:
DMZ+ On:
Windows Server 2016 download - 70mbit
Windows Server 2016 upload - >900mbit
Windows 10 download - >900mbit
Windows 10 upload - >900mbit
DMZ+ Off:
Windows Server 2016 download - >900mbit
Windows Server 2016 upload - >900mbit
Windows 10 download - >900mbit
Windows 10 upload - >900mbit
No idea what's causing this. It's happening on physical and virtual servers, and systems with different hardware entirely. I created two VMs, Windows 10 and Server 2016, put them on the same ESXi host, and consistently reproduced the behavior over and over again. I swapped my EdgeRouter out for a regular, off-the-shelf Asus N66U and it does the same thing. I compared all the nic and tcp settings between the OSs.
If DMZ+ is enabled, then Windows Server 2016 will hit 70mbit download on a speedtest and stay there. Same speed, exact same behavior on multiple physical and virtual machines.
It's weird and I want to try to figure out why it's happening. I don't think it's necessarily related to the download performance issues I started having a month ago. Even with DMZ+ disabled and only using the 5268, my downloads are no faster.
Anyone have any ideas?
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