Firewalls on Linux

Taking a look at Layer 3 and Layer 7 firewalls on Linux.

3 videos  //  24 minutes of training

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Course description

Firewalls are an important first line of defense on the internet. Learn the basics of setting up Layer 3 firewall rules on a Linux server. These days, applications need protection from attacks as well, so we’ll also look at Web Application Firewalls.

Course syllabus

Firewalls for Linux (Layer 3)Duration: 9:44

A look at iptables and UFW, and usage examples of how to enable/disable rules.

WAF Firewall (Layer 7)Duration: 8:19

Using ModSecurity on Apache2 to protect web applications.

Demo of ModescurityDuration: 5:59

Demo of configuring and using ModSecurity with OWASP rules and paranoia levels.

Meet the author

Jason Welsh

LinkedIn

Jason Welsh started experimenting with Linux back in 1994 when it was still packaged on floppy disks. Over the years, he has run just about every flavor of Linux there is as well as a few years trying out FreeBSD.

He has been administering Solaris and Linux systems professionally since around 2003, supporting everything from Linux running on the server hardware to storage to VPNs and firewalls. He’s always on the lookout for new and exciting things to try out in his home lab, which runs a Proxmox server. He’s tolerant of all Linux distributions, but the current favorite is Arch or Manjaro Linux.

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