Columbus Project is an API first subdomain discovery service, blazingly fast subdomain enumeration service with advanced features.

Columbus returned 763 subdomains of tesla.com in less than a second.

By default Columbus returns only the subdomains in a JSON string array:

curl 'https://columbus.elmasy.com/api/lookup/github.com'

But we think of the bash lovers, so if you don't want to mess with JSON and a newline separated list is your wish, then include the Accept: text/plain header.

DOMAIN="github.com"

curl -s -H "Accept: text/plain" "https://columbus.elmasy.com/api/lookup/$DOMAIN" | \
while read SUB
do
        if [[ "$SUB" == "" ]]
        then
                HOST="$DOMAIN"
        else
                HOST="${SUB}.${DOMAIN}"
        fi
        echo "$HOST"
done

For more, check the website and the API documentation.

• Certificate Transparency
• DNS server

See more statistics on the website.

Usage of columbus-server:
  -check
    	Check for updates.
  -config string
    	Path to the config file.
  -version
    	Print version informations.

git clone https://github.com/elmasy-com/columbus
make server-build

Create a new user:

adduser --system --no-create-home --disabled-login columbus-server

Create a new group:

addgroup --system columbus

Add the new user to the new group:

usermod -aG columbus columbus-server

Copy the binary to /usr/bin/columbus-server.

Make it executable:

chmod +x /usr/bin/columbus-server

Create a directory:

mkdir /etc/columbus

Set the permission to 0600.

chmod -R 0640 /etc/columbus

Set the owner of the config file:

chown -R columbus-server:columbus /etc/columbus

Copy the config file to /etc/columbus/server.conf and configure.

Install the service file (eg.: /etc/systemd/system/columbus-server.service).

cp columbus-server.service /etc/systemd/system/

Reload systemd:

systemctl daemon-reload

Start columbus:

systemctl start columbus-server

If you want to columbus start automatically:

systemctl enable columbus-server

This program is used to parse the certificates from a CT log and insert into the Columbus database.

make scanner-build

The columbus-scanner.sha is signed with this key.

Download the key:

gpg --recv-key 10BC80B36072944B5678AF395D00FD9E9F2A3725

1. Place the binary somewhere
2. Update and place the config file somewhere
3. Update and install columbus-scanner.service somewhere

A DNS server to collect domains to Columbus Server.

The goal of dns is to make it easy/possible for users to easily contribute to the Columbus Project.

By setting the DNS servers to dns while enumerationg subdomains, hunting bugs, etc you can contribute to the Columbus Project.

                               _________________
  |---> dig exmaple.com A ---->| COLUMBUS-DNS  | -----> Insert -----> Columbus DB
  |                            -----------------
  ^                                   |
  |                                   V
Alice <------- 93.184.216.34 <---------

• Only domains with valid answer will be sent to the server (NOERROR)

THIS SERVER IS NOT MEANT TO USED AS A DAILY DNS RESOLVER!

The checksum file is signed with key 10BC80B36072944B5678AF395D00FD9E9F2A3725.

gpg --receive-key 10BC80B36072944B5678AF395D00FD9E9F2A3725

Create a new user:

adduser --system --no-create-home --disabled-login columbus-dns

Create a new group (if not exists):

addgroup --system columbus

Add the new user to the new group:

usermod -aG columbus columbus-dns

Copy the binary to /usr/bin/columbus-dns.

Make it executable:

chmod +x /usr/bin/columbus-dns

Create a directory (if not exists):

mkdir /etc/columbus

Set the permission to 0600.

chmod -R 0640 /etc/columbus

Set the owner of the config file:

chown -R columbus-dns:columbus /etc/columbus

Copy the config file to /etc/columbus/dns.conf and configure.

Install the service file (eg.: /etc/systemd/system/columbus-dns.service).

cp columbus-dns.service /etc/systemd/system/

Reload systemd:

systemctl daemon-reload

Start Columbus DNS:

systemctl start columbus-dns

If you want to Columbus DNS start automatically:

systemctl enable columbus-dns

HTML + tailwindcss + DaisyUI. The style is inspired by Introduction theme.

Create gifs with VHS.

System administrator service and Cybersecurity for small and medium-sized businesses in and around Győr.