Protecting your network with the Suricata intrusion detection system
Conclusion
IDS and IPS systems are generally difficult to set up and maintain. If you don't tune your rules, you can get a lot of false positives, which might block legitimate traffic or mask an actual attack in the flood of alerts. However, the upside is significant; you can block attacks in real time (using IPS mode) and provide alerts of outgoing attacks (indicating compromised internal hosts). Additionally, certain types of data (such as TLS/SSL certificate logs) do not take up a lot of space and can provide invaluable insight later, when attacks occur and information about malware becomes available. Once network traffic is gone, it's gone forever. Unless you record it, chances are you'll never be able to reconstruct what truly happened.
Infos
- Suricata: http://suricata-ids.org/
- Suricata Installation: https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Suricata_Installation
- PulledPork: https://code.google.com/p/pulledpork/downloads/list
- Suricata IPS Setup: https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Setting_up_IPSinline_for_Linux
- Barnyard2: https://github.com/firnsy/barnyard2
- libhtp: https://github.com/ironbee/libhtp
- Suricata File Extraction: https://redmine.openinfosecfoundation.org/projects/suricata/wiki/File_Extraction
- pyinotify: https://github.com/seb-m/pyinotify
- Security Lessons: Spoofed Browsers: http://www.linux-magazine.com/w3/issue/114/054-055_kurt.pdf
- Mozilla Included certificate authorities: https://www.mozilla.org/en-US/about/governance/policies/security-group/certs/included/
- Blocklists of Suspected Malicious IPs and URLs: http://zeltser.com/combating-malicious-software/malicious-ip-blocklists.html
- Snorby: https://snorby.org/
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