I actually have two issues. I believe whatever is causing one is likely causing the other.
1. When remotely connected to the network via a PPTP VPN, I can access all devices on the network except the two TP-Link switches.
2. All network devices successfully update their system times via an NTP server except the same two switches with the VPN issue.
-All devices on the network are connected to the internet and accessible by each other.
-All devices, including the switches in question, are accessible when directly connected to the network (not via VPN), but the NTP issue still exists.
-All devices on VLAN1 (untagged).
-All TP-Link equipment has static IPs without conflicts, same subnet mask (255.255.255.0), and default gateway (192.168.1.1).
-The Router and AP’s are controlled by the Hardware Controller but none of the switches are (including the switches that work as expected).
TL-ER7206 Router (192.168.1.1)
TL-SG3452P switch (.1.2)
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TL-SG3210XHP-M2 switch (.1.3) OC200 hardware controller (.1.9) three TL-SG2008 switches (.1.5-7)
three EAP660HD access points (.1.11-13)