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A comment on The Internet Is Cool. Thank You, TCP. Parent comment

Re:The Internet Is Cool. Thank You, TCP by Twisol on Saturday November 15, 2025 @03:51AM (#45936005)
> If it's IPv4, you need to put a number between 0 and 255 to the protocol field from this list:

To save a skim (though it's an interesting list!), protocol codes 253 and 254 are suitable "for experimentation and testing".

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