Re: [tsvwg] Regarding DTLS and UDP options

[Joe Touch <[e-mail]>]

On 4/17/2017 2:07 PM, Joe Touch wrote:
> I don't think we should be writing rules to indicate who should NOT be
> changing them, if we already have rules indicating the only parties that
> can. (granted, the requirement in 7 needs to be revised in 2119-speak).
FWIW, the doc currently says that the options are intended for use by
the endpoints.

However, just as NATs already change transport headers and options
(e.g., TCP), they could do so here as well.

In both cases, the same caveats apply:
    - if the endpoints don't want to allow changes, they must use (true)
transport or network protections
    - if the middlebox (or any other mechanism, e.g., offloading)
changes them, they need to know what they're doing and do it right

Again, none of this is news.

Joe