Strange VPN issue.

[TomT]

Hi.

Today I've finally got my opnsense box online and working.

Most things seem to be working well, but I have two android clients who have an issue access several sites but ONLY when routing via PIA Wireguard.

All wifi clients access via the same access points, get there IP Address & DNS details from the same DHCP server and route out via the same PIA wireguard VPN.

I've got my phone and my tablet sat in front of me. My phone seems to be able to get anywhere, my tablet is the one having troubles.

Phone has the IP Address 10.10.10.10, Tablet 10.10.10.1
Both have the default gateway as 10.10.10.1 ( opnsense )
Both have DNS server as 10.10.10.1

On my phone I can go to tumblr and log in, on my tablet I can get to the site but login times out.
There are various web sites that work for the phone, but not for the tablet.

There are no specific rules configured, all traffic is routing via the PIA VPN. If I taken them off the VPN then it works..

Anyone had any issues with this, or any idea who to start looking in to it ?

Thanks

[TomT]

This appears to be an MTU/MSS issue.
fingerlessglov3s has helped a lot and things are improving, but still having issues.