SnipIT No 6: Allow HTTP through CentOS firewall

SnipIT is a series of short blogs containing useful information in an easily digestible format. With a fresh install of CentOS, the firewall prevents http and https traffic. To test that it is the firewall preventing access to the web server disable the firewall: sudo systemctl stop firewalld Then try browsing to the servers IP address for a remote machine. […]

Introduction to cyber security – Week 6, Network Security

Firewall basics Blocks dangerous communications from spreading across network, either from outside into a network or within the network. Can be dedicated hardware, part of router or integrated with OS. Compares addressing and protocol information of datagram to rules setup in firewall’s software. If datagram comes from a hacker and the rules say block unknown then the firewall rejects datagram […]