On 28/09/2020 13:28, Sergey Budnevitch wrote:

> It works actually.

Indeed. This has worked before, so I was wrong.

It works on router, but not on clients.

> was in tunnel and broken PMTUD

Yep, I'm using HE tunnel with 1480 MTU auto configured.

> so also try to reduce MTU on the interface.

But setting it manually to lowest posible 1280 changes nothing.

Setting MTU to 1480 on client's eth0 make it work, but this is not a
solution.

The router is debian stable with 4.19.0 or 5.7.0


--
sergio.
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