Author
Jungwoo Ryoo
Released
4/1/2021
Network protection is vital to organizations big and small, but it doesn't have to be an expensive proposition. Learn how to protect your network with open-source tools, and do it completely free. Jungwoo Ryoo shows how to set up firewalls, investigate network traffic with a packet analyzer, detect threats and malicious activity with an intrusion-detection system, and enable network logging and monitoring. Start here for a low-cost route to a more secure network.
Skill Level Intermediate
2h 35m
Duration
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Introduction
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What you should know1m 14s
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Set up environment3m 30s
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1. Understanding Open-Source Software
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Costs and savings2m 31s
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2. Firewalls
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What is a firewall?3m 20s
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Host firewalls3m 57s
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Network firewalls2m 55s
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3. Hosts as a Router
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Adding a network adapter3m 49s
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Testing the second adapter2m 20s
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Setting up IP forwarding3m 55s
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Changing Netfilter settings6m 37s
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Testing the router1m 21s
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4. Hosts as a Firewall
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Setting up a web server3m 41s
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Port forwarding5m 28s
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Understanding one-legged DMZ2m 44s
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Understanding true DMZ1m 32s
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Setting up Squid5m 16s
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5. Packet Analysis
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What is packet analysis?2m 59s
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ARP poisoning example4m 5s
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Wireshark hands-on3m 40s
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6. Intrusion Detection Systems (IDS) and Vulnerability Assessment
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What is an IDS?3m 21s
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Snort as a packet sniffer4m 19s
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Nessus2m 37s
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Network scanning with Nessus2m 30s
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7. Logging and Monitoring
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Logging1m 36s
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Syslog-ng2m 23s
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Log forwarding: Part 13m 4s
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Log forwarding: Part 26m 30s
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Kiwi1m 16s
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SNMP2m 42s
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Conclusion
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Video: Protect your network with free software