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Open Source Tools for the Systems Administrator


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Presentation on open source tools for systems administrators given at the fall 2013 Barcamp Rochester

Presentation on open source tools for systems administrators given at the fall 2013 Barcamp Rochester

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  • 1. Open Source Tools for the Systems Administrator Charles Profitt
  • 2. Why Have Tools? Sf Hp
  • 3. Why Open Source? Ba Ss Cu
  • 4. Four Tools Ca Nm nmap Cacti Os Ossec Rt RackTables
  • 5. ● Ca ● ● Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database. The frontend is completely PHP driven. Along with being able to maintain Graphs, Data Sources, and Round Robin Archives in a database, cacti handles the data gathering. There is also SNMP support for those used to creating traffic graphs with MRTG. Ability to add templates and custom scripts Maintain historical data and display it visually to vendors and management Nm nmap Cacti Os Ossec Rt RackTables
  • 6. Ca Cacti
  • 7. ● Os Ossec ● ● ● OSSEC is a scalable, multi-platform, open source Host-based Intrusion Detection System (HIDS). It has a powerful correlation and analysis engine, integrating log analysis, file integrity checking, Windows registry monitoring, centralized policy enforcement, rootkit detection, real-time alerting and active response. It runs on most operating systems, including Linux, OpenBSD, FreeBSD, MacOS, Solaris and Windows. Maintains logs beyond what is feasible for Windows to store Makes searching logs from multiple servers much easier Alerts can be setup for specific events and customized to go to individuals responsible
  • 8. Os Ossec
  • 9. Os Ossec
  • 10. ● Nm ● ● ● Nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. It was designed to rapidly scan large networks, but works fine against single hosts. Establish baselines for servers and desktops. Find intrusions Ensure compliance nmap Nmap scan report for Host is up (0.0011s latency). Not shown: 999 closed ports PORT STATE SERVICE 23/tcp open telnet Device type: router|WAP Running: Cisco IOS 12.X OS details: Cisco 836, 1751, 1841, or 2800 router (IOS 12.4 - 15.0), Cisco Aironet AIR-AP1141N WAP (IOS 12.4)
  • 11. Nm nmap Nmap scan report for ( Host is up (0.00044s latency). Not shown: 992 filtered ports PORT STATE SERVICE 80/tcp open http 427/tcp open svrloc 443/tcp open https 902/tcp open iss-realsecure 5988/tcp closed unknown 5989/tcp open unknown 8000/tcp open http-alt 8100/tcp open unknown Device type: general purpose|storage-misc|specialized Running (JUST GUESSING) : FreeBSD 7.X|8.X|6.X|5.X|5.x (92%), VMware ESX Server 3.X|4.X (90%), Crestron 2-Series (88%), Mirapoint embedded (87%) Aggressive OS guesses: FreeBSD 7.0-RELEASE-p1 - 8.0-CURRENT (92%), FreeNAS 0.686 (FreeBSD 6.2-RELEASE) or VMware ESXi Server 3.0 - 4.0 (90%), FreeBSD 5.2.1RELEASE (90%), FreeBSD 5.4 or 5.5 (x86) (90%), FreeNAS 0.69.2 (FreeBSD 6.3STABLE - 6.4-RELEASE) (90%), FreeBSD 7.1-RELEASE (90%), FreeBSD 8.0-BETA2 8.0-RC2 (89%), FreeBSD 7.0-CURRENT (pre-release) (89%), FreeBSD 7.0-RELEASE-p2 7.1-PRERELEASE (89%), FreeBSD 7.2-STABLE (89%) No exact OS matches for host (test conditions non-ideal).
  • 12. ● ● ● Rt RackTables ● ● ● Racktables is a nifty and robust solution for data center and server room asset management. It helps document hardware assets, network addresses, space in racks, networks configuration and much much more! Document your servers both physical and virtual Document networks Generate reports Maintain visual diagrams of rack placement Embed Cacti graphs
  • 13. ● ● ● ● Rt RackTables ● ● ● Drill down Filter Front, middle and back rack slots Automated rack slots (42 - default) Warranty dates Support contact information Asset management data
  • 14. Questions ? ? ? ?