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INTRUSION DETECTION SYSTEM

INTRUSION DETECTION SYSTEM. Sebuah Pengenalan oleh Budi Rahardjo budi@indocisc.com. Apa itu IDS?. Sistem untuk mendeteksi adanya “ intrusion ” yang dilakukan oleh “ intruder ” Mirip seperti alarm. Intrusion.

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INTRUSION DETECTION SYSTEM

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  1. INTRUSION DETECTION SYSTEM Sebuah Pengenalan oleh Budi Rahardjobudi@indocisc.com

  2. Apa itu IDS? • Sistem untuk mendeteksi adanya “intrusion” yang dilakukan oleh “intruder” • Mirip sepertialarm

  3. Intrusion • Didefinisikan sebagai kegiatan yang bersifat anomaly, incorrect, inappropriate yang terjadi di jaringan atau di host

  4. Jenis IDS • Network-basedmemantau anomali di jaringan,misal melihat adanya network scanning • Host-basedmemantau anomali di host,misal memonitor logfile, process, file owenership, mode

  5. Anomali • Traffic / aktivitas yang tidak sesuai dgn policy:- akses dari/ke host yang terlarang- memiliki content terlarang (virus)- menjalankan program terlarang (web directory traversal:GET ../..; cmd.exe )

  6. IDS yang populer • snort (open source)http://www.snort.org • Sourcefire (versi komersial)http://www.sourcefire.com • ISS RealSecure & BlackICEhttp://www.iss.net • Axenthttp://www.axent.com • Cisco IDS (dahulu NetRanger) • Tripwire, swatch, dll.

  7. snort • Open source IDShost-basednetwork-basedpacket snifferimplementasi di UNIX & Windows • Beroperasi berdasarkan “rules”

  8. Contoh log snort • The log begins from: Mar 9 09:11:05 • The log ends at: Mar 9 12:22:24 • Total events: 161 • Signatures recorded: 6 • Source IP recorded: 12 • Destination IP recorded: 44 • # of attacks from to method • =========================================== • 61 202.138.228.73 202.138.228.74 IDS135-CVE-1999-0265-MISC-ICMPRedirectHost • 31 192.168.1.51 192.168.1.11 ICMP Destination Unreachable{ICMP} • 5 202.110.192.93 202.138.228.74 spp_http_decode: ISS Unicode

  9. Snort add-ons: demarc

  10. Masalah • Serangan baru memiliki signature yang baru sehingga daftar signature harus selalu diupdate • Network semakin cepat (giga) sehingga menyulitkan untuk menganalisa setiap paket • Jumlah host makin banyak: distributed IDS • Terlalu banyak laporan (false alarm)

  11. Penutup • IDS merupakan sebuah komponen utama dari pengamanan sebuah jaringan (situs) • IDS masih membutuhkan pengembangan untuk mencapai maturity

  12. Bahan Bacaan • Northcutt, Stephen"Network Intrusion Detection“, New Riders, 1999 • Situs incidentswww.incidents.org • Intrusion detection FAQhttp://www.sans.org/newlook/resources/IDFAQ/ID_FAQ.htm • IDS product queryhttp://www.nwfusion.com/bg/intrude2/intrude2result.jsp?_tablename=intrude2

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