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mkj 8 months ago

Would that help with UDP, or only TCP?

ajb 8 months ago | parent | next [-]

That particular one, only TCP. There is a different one for UDP applications: https://www.rfc-editor.org/rfc/rfc8899

Because UDP is only a very thin layer, each layer on top (eg, QUIC) has to implement PLPMTUD; although, recently IETF standardised a way to extend UDP to have options and PLPTMUD is also specified for that: https://datatracker.ietf.org/doc/draft-ietf-tsvwg-udp-option...

8 months ago | parent | prev | next [-]
[deleted]
cryptonector 8 months ago | parent | prev [-]

You can implement passive PMTUD with UDP if you like. It's more work for you, but it's perfectly doable.