How would you judge if a remote server is running IIS or Apache?
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Answer / chaitanya
Error messages oftentimes giveaway what the server is running, and many times if the website administrator has not set up custom error pages for every site, it can give it away as simply as just entering a known bad address. Other times, just using telnet can be enough to see how it responds. Never underestimate the amount of information that can be gained by not getting the right answer but by asking the right questions.
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Answer / gaurav
Penetration testing techniques can easily reveal from a website which of the ports, operating systems and web servers are running. For Instance, Nikto and Owasp-Zed are two methods of doing this.
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1. Assume that passwords are selected from four-character combination of 26 alphabetic characters. Assume that an adversary is able to attempt passwords at a rate of one per second. a. Assuming no feedback to the adversary until each attempt has been completed, what is the expected time to recover the correct password? b. Assuming feedback to the adversary flagging an error as each incorrect character is entered, what is the expected time to discover the correct password?
What is the difference between a virus and a trojan?
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