nmap / nmap/nmap

Service detected as RTSP even if it is HTTP

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Nmap
Dominant language
C
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Description

Describe the bug
I am trying to get the version of some servers using nmap -sV -p 80. I know they are running Squarespace, but nmap returns me it is an RTSP service most of the time. There are few times when it returns it as HTTP, but not very often.

I have tested this with both nmap 7.80 and 7.91 using nmap -sV -p 80 www.squarespace.com. I feel like nmap 7.91 is showing me the correct service (HTTP) more often than 7.80 does. Also, 7.80 tells me from time to time that it is SIP...

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Research direction

Start by reproducing the report with nmap -sV -p 80 www.squarespace.com on the mentioned 7.80 and 7.91 versions, recording whether the service is identified as HTTP, RTSP, or SIP. No source file or test is named; investigate the service-detection path and use consistent HTTP identification as the completion criterion.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
networking
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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