Linux Security Improved. Create professional Netfilter/Iptables Firewalls. All you need to know about Netfilter/Iptables
InstructorAndrei Dumitrescu
Free
Free
FreeCovers stateful firewall implementation through connection tracking and large-scale IP management using Ipset.
Includes specific labs for configuring SNAT and testing network connections to reinforce NAT and Port Forwarding concepts.
Editorial course preview
These 4 complementary views highlight concrete, legible examples from the course presentation.
This terminal screenshot demonstrates a shell script automating firewall configuration by downloading IP ranges via wget, loading them into an ipset list, and applying iptables rules.
This terminal view shows a shell script defining iptables rules that filter network traffic by specific MAC addresses and allow SSH connections.
This terminal session demonstrates configuring iptables rules to filter traffic by MAC address and block SSH access, then verifies the active configuration using the verbose list command.
An introductory slide for the Linux Security course presenting instructor Andrei Dumitrescu, highlighting his two decades of DevOps experience and Cisco certifications.
Provides a dedicated section on using shell scripts for firewall management alongside a supplemental Bash scripting appendix.
One signal suggests that Iptables features may be deprecated on newer distributions as the industry shifts toward nftables. This signal predates the displayed course update; the update may have addressed it, but the update label does not prove that it was corrected.
The curriculum aligns with sysadmin tasks but may be too difficult for those without the required Linux and networking foundations. This signal predates the displayed course update; the update may have addressed it, but the update label does not prove that it was corrected.