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Hi!

I recently updated to 25.1 and today to 25.1.1. Since the main update my android devices and my sons iPhone are having trouble loading websites or other (larger) media. My other devices (laptop or streaming devices) do not have any trouble.

Based on the high amount of TCP DUP ACKs and retransmitting - I am losing packages, just on this devices.

My opnsense is connected to WAN via PPPOE (German Telekom) which leads to MTU sizes of 1492. I double checked this configuration and also configured this MTU size now for the LAN. Also applied the patches described here in https://github.com/opnsense/src/issues/235, prior to the update to 25.1.1.
Also disabled IPv6 for now...

I am a little buzzled and looking for another angle to look on this issue.. any idea where I should take another look about this issue?

Any help appreciated!

Thanks,
   Christian

Technical details:

* Wifi APs with OpenWRT 24.10.0 running BATMAN mesh
* One AP connected to opnsense box
* VLANs (LAN, Guest, Management)
* opnsense: WAN with PPPOE via VDSL modem
* WAN is NOT having MTU set, since the auto calculated value is good!
* LAN MTU = 1492