Tuesday, April 12, 2011
Anu
Httptunnel creates a bidirectional virtual data path tunneled in HTTP requests. The requests can be sent via an HTTP proxy if so desired. This can be useful for users behind restrictive firewalls. If WWW access is allowed through a HTTP proxy, it's possible to use httptunnel and telnet or PPP to connect to a computer outside the firewall.
Here is how htc sends data to the destination:
- Open TCP connection to hts
- Send HTTP POST with a large Content-Length
- Send TUNNEL_DATA packets until POST Content-Length would be exceeded.
- Send TUNNEL_PADDING packets to exactly satisfy Content-Length - 1
- Send TUNNEL_DISCONNECT (1 byte)
- Close TCP connection
- Go to step 1
- Open TCP connection to hts
- Send HTTP GET
- Wait for response from hts
- Read TUNNEL_DATA, then TUNNEL_PADDING, TUNNEL_DISCONNECT packets
- Close TCP connection
- Go to step 1
Tunnel creation and destruction
This
can be useful for users behind restrictive firewalls. If WWW access is
allowed through a HTTP proxy, it's possible to use httptunnel and, say,
telnet or PPP to connect to a computer outside the firewall.
To know more about this tools, click here .
Thanks....
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1 comments:
kya windows ke users ke liye kuch bhi nhi h
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