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What is HTTP tunneling?

 
Greenhorn
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hi guys!
can u please help me knowing what the HTTP tunneling is.is it the same as servlet chaining?
pls help me.
bye.
 
Greenhorn
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HI
Firewall controlls network traffic on a machine for Security.These will not allow any connections from outside network to be established.As we all know , port 80 is open for web traffic.So in this case, this port can be used for client server communications.Sending a request an Http request on port 80 is know as Http Tunneling through firewalls.
This is different from servlet chaining.
In Serlet Chaining , the output from one servlet is sent to another servlet which takes place on the server side.
An example of Http Tunneling is an Applet downloaded on a client machine which is behind a firewall.
Then the applet can't directly communicate with the webserver in which case you have to use HttpTunneling
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