P flag


What is P (Push) flag in TCP used in real life ? Could cisco block such packets somehow ?

Thanx Michal

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To see how the filtering with ACLs based on TCP flags might be done, take a look at

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Cisco da Gama
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vertigo skrev:

Normally a TCP host is allowed to buffer data. The TCP push flag forces it to hand the data over to upper level applications right away insted of buffering it. (it is still allowed to delay acknowledgements though.)

This is from the RFC:

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