We did a lot of work yesterday trying to fix the network. The Information Security Specialist at the county sheriff’s office informed us that the intruders got into the network by “TELNET”.
Unfortunately, our previous network engineer didn’t use SSH also known as (secure shell) and we have been open to the internet for some time! I guess it was only a matter of time until someone infiltrated us? As network engineers, make sure you LOCK IT DOWN with passwords, logins, and encryptions. Another way to help secure your networks are by using firewalls, ACL’s, restrict ports, and physical connections.