Censys Search Engine – Public Host & Network Search

The New Acunetix V12 Engine


Censys Search Engine is a public host & network search tool that allows computer scientists to ask questions about the devices and networks that compose the Internet. Driven by Internet-wide scanning, it lets researchers find specific hosts with the networksearch and create aggregate reports on how devices, websites, and certificates are configured and deployed.

Censys Search Engine - Public Host & Network Search


Censys collects data on hosts and websites through daily ZMap and ZGrab scans of the IPv4 address space, in turn maintaining a database of how hosts and websites are configured. Researchers can interact with this data through a search interface, report builder, and SQL engine.

Features of Censys Search Engine

Censys maintains three datasets through daily ZMap scans of the Internet and by synchronizing with public certificate transparency logs:

  • Hosts on the Public IPv4 Address Space
  • Websites in the Alexa Top Million Domains
  • X.509 Certificates

You can search for records that meet certain criteria (e.g., IPv4 hosts in Germany manufactured by Siemens, or browser trusted certificates for github.com), generate reports on how websites are configured (e.g., what cipher suites are chosen by popular websites?), and track how networks have patched over time.

How to use Censys Networksearch


Simple Search

If you simply search for a word or phrase, Censys will return any records that contain the phrase. For example, searching for nginx will return any records that contain the word nginx. Searching for 23.0.0.0/8 will return all hosts in that network.

Advanced Search

Censys data is structured and supports more advanced queries including searching specific fields, specifying ranges of values, and boolean logic. For example, you can search for hosts with the HTTP Server Header “Apache” in Germany by running the query 80.http.get.headers.server: Apache and location.country_code: DE.

SQL Interface

To facilitate complex questions that can’t be expressed in a single search, we also allow researchers to run SQL queries against the raw datasets and historical snapshots.

You can access Censys here: https://www.censys.io/

Posted in: Networking Hacking


Latest Posts:


Acunetix v12 - Pause & Resume Acunetix v12 – More Comprehensive More Accurate & 2x Faster
Acunetix, the pioneer in automated web application security software, has announced the release of Acunetix v12 - more comprehensive, accurate & 2x faster.
CloudFrunt - Identify Misconfigured CloudFront Domains CloudFrunt – Identify Misconfigured CloudFront Domains
CloudFrunt is a Python-based tool for identifying misconfigured CloudFront domains, it uses DNS and looks for CNAMEs which may be allowed to be associated with CloudFront distributions.
Airbash - Fully Automated WPA PSK Handshake Capture Script Airbash – Fully Automated WPA PSK Handshake Capture Script
Airbash is a POSIX-compliant, fully automated WPA PSK handshake capture script aimed at penetration testing, it is compatible with Bash and Android Shell.
XXEinjector - Automatic XXE Injection Tool For Exploitation XXEinjector – Automatic XXE Injection Tool For Exploitation
XXEinjector is an XXE Injection Tool that automates retrieving files using direct and out of band methods. Directory listing only works in Java applications.
Yahoo! Fined 35 Million USD For Late Disclosure Of Hack Yahoo! Fined 35 Million USD For Late Disclosure Of Hack
Ah Yahoo! in trouble again, this time the news is Yahoo! fined for 35 million USD by the SEC for the 2 year delayed disclosure of the massive hack, we actually reported on the incident in 2016 when it became public.
Drupwn - Drupal Enumeration Tool & Security Scanner Drupwn – Drupal Enumeration Tool & Security Scanner
Drupwn is a Python-based Drupal Enumeration Tool that also includes an exploit mode, which can check for and exploit relevant CVEs.


Comments are closed.