Question for Snort gurus re: TTL and intercepted communications

[jeffs () speakeasy net]

I'm wondering if there might be a method to determine of a data stream has been intercepted or sidetracked by looking 
at the TTL values or other values in a datastream.  Of course TTL is relative and wouldn't in and of itself tell if a 
data stream has been intercepted, but I'm wondering if one could build a model whereby you could use a baseline 
refernce of TTL pulled off a tracerroute or something like that and then compare some values from a seperate, baseline 
value from a third party application between server and client, to compare said values against values analyzed by snort.

Just an idea.

Looking for suggestions.

J.




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