Re: Updating the Networking Section of the NetBSD Guide

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Sat, Apr 17, 2021 at 05:35:46PM +0100, Robert Swindells wrote:
> The section on "Setting up MSS clamping" could be modified a bit. It
> isn't always needed, not for OpenReach in the UK at least.

Some providers support PPPoE with "mini" jumbo frames now, so that the
inner packet is 1500 Bytes. Not all do, e.g. Deutsche Telekom didn't
role that out as part of the BGN migration like others do.

> When I modified the pppoe(4) man page I didn't have a feel for whether
> needing to do MSS clamping was more common than not.

The need has gone down a lot as blanket ICMP filtering is less common
and the failure cases are more obvious with the move to a TLS focused
internet.

Joerg