this post was submitted on 24 Nov 2023
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I have selfhosted various services on some ports but I don't see them with NMAP (alien.top)
submitted 11 months ago by [email protected] to c/[email protected]
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Hi all, I have selfhosted various services on my server via docker such as the whole *rr suite, plex, jellyfin, pihole, nginx, qbittorrent.

Out of curiosity I ran an nmap on the server IP but I see a lot less ports than I actually use.

With nmap 192.168.1.180 i see:

  • 53/tcp open domain
  • 80/tcp open http
  • 81/tcp open hosts2-ns [this is nginx]
  • 443/tcp open https
  • 6881/tcp open bittorrent-tracker
  • 8080/tcp open http-proxy [this is pihole]
  • 9091/tcp open xmltec-xmlmail [this is qbittorrent]

Why don't I see all the ports for all the services?

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[–] [email protected] 1 points 11 months ago

Are you running nmap from the system itself? Depending on the network type you use docker does some pretty complicated things with NAT, so scanning a machine from itself isn't always very useful.