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Certdog Debian Installation


  • A Debian 11 (bullseye) installation. Note other versions may work but this version is confirmed

  • An account with sudo/root permissions

  • The ability to install mongodb community edition

It is recommended that a separate, dedicated user be created which will run the certdog application, although it can be run under an existing account

Install Mongo DB

Follow the instructions to download and install Mongo DB Community Edition version 5.0.9 e.g.

Confirm mongo DB is running by typing:


and ensure you connect and get the mongo db prompt. Type exit, to exit the prompt

Get Certdog

  1. Download Certdog from here

    File Hashes:

    • SHA1: 599a20f456cca88917656c28328c222c62309486

    • SHA256: 26ae73a46b7fb08cda5d10577972980a3de8c6f2963133d8c18dbf3f38dbda85


Extract the installation e.g.

tar xvf ./certdog.tar.gz

This will extract all files into ./certdog

Navigate to:


and run:


The installation will start and will take a few minutes to complete:

Configuring Certdog...please wait...

Configuration is complete

If you see any errors or things do not seem to be working, first examine the install log:


Other logs, including the mongodb, application (certdog.log) and startup/shutdown logs are stored here:


By default the main certdog application listens on port 1443 on all interfaces and the CRL server on port 1480. To access over the standard ports (443 and 80) you must configure routes. For example:

sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 1443
sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 1480
sudo iptables-save

This will redirect incoming traffic on port 443 to 1443 and port 80 to 1480

You may need to open firewall rules to allow ports 80 and 443, e.g.

sudo iptables -I INPUT -p tcp -m tcp --dport 443 -j ACCEPT
sudo iptables -I INPUT -p tcp -m tcp --dport 80 -j ACCEPT
sudo iptables-save

To confirm that the application is listening on ports 1443 and 1480, you may use

netstat -tuplen

Which should show something like the following:

Proto Recv-Q Send-Q Local Address           Foreign Address         State       User       Inode      PID/Program name
tcp        0      0*               LISTEN      108        146542     -
tcp6       0      0 :::1443                 :::*                    LISTEN      1004       139335     -

Which indicates port 1443 is listening in all interfaces

Enable any other firewall rules that may be in place to allow ports 80 and 443 to the server e.g. in Azure Networking or AWS Security Groups

Post Install

Open a browser and navigate to:

https://[Server Name or IP]/certdog

You will observe a browser SSL error which is due to the initial default SSL certificate. See here to reconfigure the SSL certificate for your server. For now you may bypass the warning

Login with the initial username and password as displayed at the end of the installer. These are temporary credentials - as soon as you first login with these details you will be forced to set a new password


In this folder:


There are two scripts:


You may examine these scripts, or configure such that the application starts on boot following standard processes for your OS

To start and stop the mongo database you may use the following commands:

sudo systemctl start mongod
sudo systemctl stop mongod


Examine the log files as mentioned above to see if anything obvious appears

Attempt to stop and start certdog using the ./ and scripts

Try restarting the database then restarting certdog

You can re-run the ./ script. Before doing so, stop certdog (./

NOTE: If you re-run the ./ script the database will be wiped and any configuration made up until that point will be lost so only re-run if having issues during the initial install. If you are having issues starting the server after it has already been up and running, then there is most likely another issue (rather than a failed install)

Full Certdog Documentation can be found here: