Re: FCC & Internet phones

[Gary Howland <gary@kampai.euronet.nl>]

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Adam Shostack wrote:
> Loren James Rittle wrote:
> | >Most
> | >presumably use a mix of a UDP data connection and tcp for control
> | >functions.
> |
> | OK, everything after the IP header is encrypted.  I don't even know
> | which protocol is in use.
> 
>         Are you willing to play Mallet?  Drop IP packets, and look for
> duplicates.  Those are TCP.  (IPSEC might handle this, but I bet there
> will be broken implementations that save time by resending.)

Are you saying UDP protocols don't retransmit un-acked packets?
If not, then you can't be sure the duplicates are TCP.


Gary
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pub  1024/C001D00D 1996/01/22  Gary Howland <gary@kampai.euronet.nl>
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