Nmap TryHackMe Room Walkthrough [level 1 |
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Nmap TryHackMe Room Walkthrough [level 1 — level 7]![]() mohomed arfath ·Follow 3 min read·Dec 8, 2020-- What networking constructs are used to direct traffic to the right application on a server? ports How many of these are available on any network-enabled computer? 65535 [Research] How many of these are considered “well-known”? (These are the “standard” numbers mentioned in the task) 1024 Task 3 → Nmap SwitchesWhat is the first switch listed in the help menu for a ‘Syn Scan’ (more on this later!)? -ss Which switch would you use for a “UDP scan”? -su If you wanted to detect which operating system the target is running on, which switch would you use? -o Nmap provides a switch to detect the version of the services running on the target. What is this switch? -sv The default output provided by nmap often does not provide enough information for a pentester. How would you increase the verbosity? -v Verbosity level one is good, but verbosity level two is better! How would you set the verbosity level to two? -vv What switch would you use to save the nmap results in three major formats? -oA What switch would you use to save the nmap results in a “normal” format? -oN A very useful output format: how would you save results in a “grepable” format? -oG Sometimes the results we’re getting just aren’t enough. If we don’t care about how loud we are, we can enable “aggressive” mode. This is a shorthand switch that activates service detection, operating system detection, a traceroute and common script scanning. How would you activate this setting? -A Nmap offers five levels of “timing” template. These are essentially used to increase the speed your scan runs at. Be careful though: higher speeds are noisier, and can incur errors! How would you set the timing template to level 5? -T5 We can also choose which port(s) to scan.How would you tell nmap to only scan port 80? -p 80 How would you tell nmap to scan ports 1000–1500? -p 1000–1500 A very useful option that should not be ignored:How would you tell nmap to scan all ports? -p- How would you activate a script from the nmap scripting library (lots more on this later!)? “- — script” How would you activate all of the scripts in the “vuln” category? “ — — script=vuln” Task 5→ TCP Connect ScanWhich RFC defines the appropriate behaviour for the TCP protocol? RFC 793 If a port is closed, which flag should the server send back to indicate this? RST Task 6 → SYN ScanThere are two other names for a SYN scan, what are they? Half-Open, Stealth\ Can Nmap use a SYN scan without Sudo permissions (Y/N)? N Task 7 → UDP ScanIf a UDP port doesn’t respond to an Nmap scan, what will it be marked as? open|filtered When a UDP port is closed, by convention the target should send back a “port unreachable” message. Which protocol would it use to do so? ICMP I will see you in part 2 see you!!!!!!!! |
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