listener

Ubuntu: Pre-Validate Network ACL and Firewall Connectivity with Netcat

Although virtualization has pushed a self-service culture for infrastructure, it is still common in production environments to need your  Network Operations team to open the required ports necessary for any new application deployment. So, while you may be able to create the base virtualized host, you can’t go much further without the network connectivity.  And Ubuntu: Pre-Validate Network ACL and Firewall Connectivity with Netcat