dnsprobe

README

DNSProbe is a tool built on top of retryabledns that allows you to perform multiple dns queries of your choice with a list of user supplied resolvers.

Resources

• Resources
• Features
• Usage
• Installation Instructions
  • From Source
  • Running in a Docker Container
  • Querying host for A record
  • Querying host for CNAME record
  • Querying CNAME records on the Subfinder output
• License

Features

• Simple and Handy utility to query DNS records.

Usage

dnsprobe -h

This will display help for the tool. Here are all the switches it supports.

Flag	Description	Example
-c	Max dns retries (default 1)	dnsprobe -c 5
-l	List of dns domains (optional)	dnsprobe -l domains.txt
-r	Request Type A, NS, CNAME, SOA, PTR, MX, TXT, AAAA (default "A")	dnsprobe -r A
-s	List of resolvers (optional)	dnsprobe -s resolvers.txt
-t	Number of concurrent requests to make (default 250)	dnsprobe -t 500
-f	Output type: ip, domain, response, simple (domain + ip, default), full (domain + response), json (domain + raw response)	dnsprobe -f json
-o	Output file (optional)	dnsprobe -o result.txt
-raw	Output the full response ignoring output type	dnsprobe -raw
-silent	Show only found results in output	dnsprobe -silent

Installation Instructions

From Source

dnsprobe requires go1.13+ to install successfully. Run the following command to get the repo -

GO111MODULE=on go get -u -v github.com/projectdiscovery/dnsprobe

In order to update the tool, you can use -u flag with go get command.

Running in a Docker Container

• Clone the repo using git clone https://github.com/projectdiscovery/dnsprobe.git
• Build your docker container

> docker build -t projectdiscovery/dnsprobe .

• After building the container using either way, run the following -

> docker run -it projectdiscovery/dnsprobe

For example, to query a list of domains for CNAME record and output the results to your host file system:

> cat domains.txt | docker run -i projectdiscovery/dnsprobe -r CNAME > bugcrowd.txt

Querying host for A record

To query a list of domains, you can pass the list via stdin (it also accepts full URLS, in this case the domain is extracted automatically).

> cat domains.txt | dnsprobe

root@test:~# cat bc.txt | dnsprobe
bounce.bugcrowd.com 192.28.152.174
blog.bugcrowd.com 104.20.4.239
blog.bugcrowd.com 104.20.5.239
www.bugcrowd.com 104.20.5.239
www.bugcrowd.com 104.20.4.239
events.bugcrowd.com 54.84.134.174

Querying host for CNAME record

> dnsprobe -l domains.txt -r CNAME

root@test:~# dnsprobe -l bc.txt -r CNAME
forum.bugcrowd.com bugcrowd.hosted-by-discourse.com.
collateral.bugcrowd.com bugcrowd.outrch.com.
go.bugcrowd.com mkto-ab270028.com.
ww2.bugcrowd.com bugcrowdinc.mktoweb.com.
researcherdocs.bugcrowd.com ssl.readmessl.com.
docs.bugcrowd.com ssl.readmessl.com.

This will run the tool against domains in domains.txt and returns the results. The tool uses the resolvers specified with -s option to perform the queries or default system resolvers.

Querying CNAME records on the Subfinder output

> subfinder -d bugcrowd.com -silent | dnsprobe -r cname

root@b0x:~# subfinder -d bugcrowd.com -silent | dnsprobe -r cname
forum.bugcrowd.com bugcrowd.hosted-by-discourse.com.
docs.bugcrowd.com ssl.readmessl.com.
go.bugcrowd.com mkto-ab270028.com.
ww2.bugcrowd.com bugcrowdinc.mktoweb.com.
researcherdocs.bugcrowd.com ssl.readmessl.com.
collateral.bugcrowd.com bugcrowd.outrch.com.
proxilate.bugcrowd.com proxilate.a.bugcrowd.com.

License

DNSProbe is made with 🖤 by the projectdiscovery team.