Exploring Cybersecurity Using a Linux Virtual Network: Hardening

TIMESTAMPS AND RESOURCES BELOW
In the third video of this series, we look at several ways to harden our Ubuntu and Fedora endpoints.
#linux #homelab #cybersecurity #pfsense

00:00 Introduction, What is Hardening?
01:13 Topics Covered
01:52 Set VM Network Adapters to Bridged/NAT, Test Connectivity
03:08 Topic 1 -- Update the Kernel and Installed Packages
04:22 Updating the Kernel and Packages in Ubuntu
05:56 Updating the Kernel and Packages in Fedora
07:23 Topic 2 -- Removing Unnecessary Software
08:58 Querying and Removing Packages on Fedora
10:44 Querying and Removing Packages on Ubuntu
11:59 Topic 3 -- Find Open Ports with nmap
16:55 Topic 4 -- Removing Unnecessary Services
18:26 Topic 5 -- Locking User Accounts
20:46 Topic 6 -- Lock the Root Account
22:46 Topic 7 -- Hardening SSH
28:56 Topic 8 -- Implementing the Host-Based Firewall in Ubuntu (UFW)
32:55 Summary

RESOURCES:
Updating the OS and Installed Packages:
https://linuxsimply.com/linux-basics/...

Managing Packages and Removing Unnecessary Software:
https://opensource.com/sites/default/...
https://blog.packagecloud.io/apt-chea...
https://opensource.com/sites/default/...

Looking for Open Ports:
https://www.securesolutions.no/zenmap...

Stopping Unneeded Services:
https://www.digitalocean.com/communit...

Hardening SSH:
https://www.digitalocean.com/communit...

Implementing the Host-Based Firewall:
https://www.redhat.com/sysadmin/begin...
https://access.redhat.com/documentati...