Neo4j cluster and firewalls

This article summarizes the required and optional communication channels for a Neo4j enterprise cluster and provides some sample rules. For the firewall rules I’m using Ubuntu’s ufw package. As a sample setup we assume the following servers. All of them have 2 network interfaces, eth0 is for communication with outside world, eth1 is for cluster […]

remove the passphrase from a pkcs12 certificate

PKCS12 defines a file format that contains a private key an a associated certifcate. These files might be used to establish some encrypted data exchange. In the current use case, OpenVPN is used to connect to a remote network. The pkcs12 is being issued by a CA (certificat authority) tool. For security reasons, the private […]