Blocking port scans

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HenrysCat

Jr. Member
Posts: 58
Karma: 2

Blocking port scans

« on: February 22, 2021, 08:20:16 pm »

I have enabled the ruleset 'emerging-scan.rules' in intrusion detection, I get a few blocked as screenshot (I assume they are blocked scans) but when I scan my ip address with https://pentest-tools.com/network-vulnerability-scanning/tcp-port-scanner-online-nmap# the open ports show up.

Any ideas what I'm doing wrong?

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OPNsense 23.1.2-amd64
FreeBSD 13.1-RELEASE-p7
OpenSSL 1.1.1t 7 Feb 2023

Voodoo

Newbie
Posts: 49
Karma: 4

Re: Blocking port scans

« Reply #1 on: February 23, 2021, 02:17:58 pm »

Suricata only blocks script enumerations if it sees nmap/zmap user agent.

It won't block syn scans. Relying on security through obscurity doesn't help anyway.

« Last Edit: February 23, 2021, 02:19:54 pm by Voodoo »

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HenrysCat

Jr. Member
Posts: 58
Karma: 2

Re: Blocking port scans

« Reply #2 on: February 23, 2021, 07:51:34 pm »

Thank you

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OpenSSL 1.1.1t 7 Feb 2023

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