Traffic at the end of the tunnel or DNS in pentest

 3r33882. 3r3-31. 3r33867. Traffic at the end of the tunnel or DNS in pentest 3r33869. 3r33865.  3r33882.
What are DNS tunnels
3r33865.  3r33882. 3r33867. On Habré is already [leech=https://habr.com/post/65322/] some 3r33869.
Articles 3r36969. where it explains what DNS tunneling is. However, a bit of theory about DNS tunneling can be found under the spoiler. 3r33838. 3r33865.  3r33882. 3r33412.
What is DNS tunneling [/b] 3r3155. 3r33867. It happens that the access to the network is tightly cut off by the firewall, and you need to transfer data badly, and then the DNS tunneling technique comes to the rescue. 3r33838. 3r33865.  3r33882. 3r33867. In the diagram, everything looks like this:
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