Nmap Enumeration - Our client wants to know if we can identify which operating system their provided machine is running on. Submit the OS name as the answer

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23

My scans show me this a linux box with 90+% certainty. But the answer is a flavour of linux. The ttl on returned packets is 63, but linux defaults to 64. I spammed the answer box and got the correct flavour of linux but I can’t find anything in my scans that confirms this. How could I find out the flavour of linux that is running ?

24

This is the best answer. i had to search for initial TTL values and surprisingly every OS has it’s own value. Some can make confusion, but that’s how it is. Thanks.

25

for me not even receiving any packet