Netcat

Testing UDP port connections using netcat

Wednesday, Dec 5, 2018
Sending messages over the Internet can be fun (we are doing it now). However, testing that connections are correctly established behind a mask of firewalls, load balancers and application servers can be challenging. Netcat offers a simple way to test the sending of messages between two servers and it is already available on the majority of server installs. Using netcat is relatively straightforward. The core thing we are doing here is using both UDP -u and listening -l. So when you use the command netcat -ul you are telling netcat to listed on UDP rather than TCP. ...