@cykz some systems, especially Windows, do ignore DHCP option 26, resp. do not ask for DHCP option 26 - so for testing purposes you may set the MTU via CMD with admin rights for a Windows machine...

@cykz You may check if you have any other TLS Layer-related services enabled (Proxy / DPI / DNS Proxy / Secure DNS / DoH/DoT). I guess the bug is related to the TLS / OCSP layer - somehow.

@cykz Yes, it's a PPPoE connection (1 Gbit/s Fiber Link from Deutsche Telekom)

Update - looks like DPI is the suspect one. IDS/IPS enabled and it is still working fine

Also issues here after upgrading my ER8411 V1.0 to firmware 1.3.6. Several service / websites didn't work / load anymore, resp. got stuck while loading. e.g. *.apple.com pages. Windows Icloud clients...

Hello TP-Link-Team, I would like to see the feature of LAN-to-LAN NAT and Policy-NAT in Omada-controlled environment for the ER8411. I have read that is this feature is available in standalone mode,...