tips and tricks tips and tricks

Shodan is a search engine for the internet of things (IoT). It allows users to search for specific types of internet-connected devices, such as security cameras or industrial control systems, and view information about them, such as their location, their internet protocol (IP) address, and their manufacturer.

This makes it a valuable tool for security researchers, who can use Shodan to identify vulnerable devices and track the spread of malware across the internet.

Shodan was created by John Matherly in 2009, and it has grown to become one of the most widely used search engines for IoT devices. One of the unique features of Shodan is its ability to search for specific keywords in the banners that many IoT devices send out over the internet. This allows users to search for devices using a variety of criteria, such as the type of device, its operating system, and its manufacturer.

In addition to its search capabilities, Shodan also offers a variety of other tools and services. For example, users can set up alerts to be notified when new devices matching their search criteria are added to the internet. They can also use Shodan to track the spread of malware across the internet, by searching for devices that have been infected with a specific strain of malware.

Overall, Shodan is an important tool for security researchers and others interested in the internet of things. It offers a unique way to search for and find internet-connected devices, and provides valuable information about those devices. While it does pose some risks, these are mitigated by the security measures in place to prevent abuse of the platform.

To use filters on Shodan, users first need to register for an account. Once they have done so, they can begin creating filters by clicking on the “Filters” tab on the left-hand side of the screen. This will bring up a list of available filters, which can be added to the search query by clicking on them.

Some examples of filters that can be used on Shodan include:

  • os: - This filter allows users to search for devices based on their operating system. For example, a search for os:linux will return results for devices running the Linux operating system.
  • geo: - This filter allows users to search for devices based on their geographical location. For example, a search for geo:us will return results for devices located in the United States.
  • hostname: - This filter allows users to search for devices based on their hostname, which is the name assigned to the device on the network. For example, a search for hostname:camera will return results for devices with “camera” in their hostname.

Once users have added filters to their search query, they can click the “Search” button to see the results. The results page will show a list of devices matching the search criteria, along with information about each device, such as its IP address and its location.

General Filters

Name Description Type
after Only show results after the given date (dd/mm/yyyy) string string
asn Autonomous system number string string
before Only show results before the given date (dd/mm/yyyy) string string
category Available categories: ics, malware string string
city Name of the city string string
country 2-letter country code string string
geo Accepts between 2 and 4 parameters. If 2 parameters: latitude,longitude. If 3 parameters: latitude,longitude,range. If 4 parameters: top left latitude, top left longitude, bottom right latitude, bottom right longitude. string
hash Hash of the data property integer integer
has_ipv6 True/ False boolean boolean
has_screenshot True/ False boolean boolean
hostname Full hostname for the device string string
ip Alias for net filter string string
isp ISP managing the netblock string string
net Network range in CIDR notation (ex. string string
org Organization assigned the netblock string string
os Operating system string string
port Port number for the service integer string
postal Postal code (US-only) string string
product Name of the software/ product providing the banner string string
region Name of the region/ state string string
state Alias for region string string
version Version for the product string string
vuln CVE ID for a vulnerability string string

HTTP Filters

Name Description Type
http.component Name of web technology used on the website string
http.component_category Category of web components used on the website string
http.html HTML of web banners string
http.html_hash Hash of the website HTML integer
http.status Response status code integer
http.title Title for the web banners website string

NTP Filters

Name Description Type
ntp.ip IP addresses returned by monlist string
ntp.ip_count Number of IPs returned by initial monlist integer
ntp.more True/ False; whether there are more IP addresses to be gathered from monlist boolean
ntp.port Port used by IP addresses in monlist integer

SSL Filters

Name Description Type
has_ssl True / False boolean
ssl Search all SSL data string
ssl.alpn Application layer protocols such as HTTP/2 (“h2”) string
ssl.chain_count Number of certificates in the chain integer
ssl.version Possible values: SSLv2, SSLv3, TLSv1,TLSv1.1, TLSv1.2 string
ssl.cert.alg Certificate algorithm string
ssl.cert.expired True / False boolean
ssl.cert.extension vNames of extensions in the certificate string
ssl.cert.serial Serial number as an integer or hexadecimal string integer / string
ssl.cert.pubkey.bits Number of bits in the public key integer
ssl.cert.pubkey.type Public key type string
ssl.cipher.version SSL version of the preferred cipher string
ssl.cipher.bits Number of bits in the preferred cipher integer Name of the preferred cipher string

Telnet Filters

Name Description Type
telnet.option Search all the options string The server requests the client do support these options string
telnet.dont The server requests the client to not support these options string
telnet.will The server supports these options string
telnet.wont The server doesnt support these options string