I’ve been using the Surf SOHO MK3 (F/W 8.3.0) setup to use a proxy DNS server for my home network. As such, I’ve chosen to use Quad9’s DNS over HTTPS service and for the past several years, it’s worked flawlessly. Quad9 is preferred over the various other DOH service providers mainly for their strict privacy policy.
On Dec 15th, Quad9 retired the use of HTTP/1.1 in favor of using the newer HTTP/2 transport protocol for all their DOH services …
ref: DOH HTTP/1.1 Retirement December 15, 2025 | Quad9
In essence, as of Dec 15th, the Quad9 DOH option no longer works (eg: no internet DNS capability what-so-ever) via my Surf SOHO DNS proxy while all other DOH service provider options remain unaffected.
I should also note that their HTTP/1.1 retirement didn’t have any adverse effects during my subsequent testing of Firefox browser’s exclusive use of Quad9’s DOH service. In fact, Firefox is still working perfectly today while the Surf SOHO Quad9 DOH proxy doesn’t.
As I don’t expect Peplink to issue a F/W update for this issue for the now retired (obsolete) Surf SOHO MK3, does anyone know or can verify whether or not the B-One series (or other products) are also effected by Quad9’s retirement of DOH HTTP/1.1 ?
If so, does anyone have any insight as to whether or not Peplink has or will be addressing this issue concerning Quad9’s decision to retire DOH HTTP/1.1 ?