1 / 14

Intrusion Detection Systems

Intrusion Detection Systems. Network Intrusion Detection System – NIDS Host-based Intrusion Detection System – HIDS Intrusion Prevention/Protection System – IPS IDS Service Centers System Logs. Network Intrusion Detection. Open Source NIDS Snort - www.snort.org

rangle
Download Presentation

Intrusion Detection Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Intrusion Detection Systems • Network Intrusion Detection System – NIDS • Host-based Intrusion Detection System – HIDS • Intrusion Prevention/Protection System – IPS • IDS Service Centers • System Logs

  2. Network Intrusion Detection • Open Source NIDS • Snort - www.snort.org • Bro - www.icir.org/vern/bro.html • Commercial NIDS • ISS RealSecure Network Sensor - www.iss.net • Intrusion Inc. SecureNet Sensor- www.intrusion.com • StillSecure Border Guard - www.stillsecure.com

  3. Host Intrusion Detection • Open Source HIDS • Samhain – la-samhna.de/samhain • LIDS - www.lids.org • AIDE - www.cs.tut.fi/~rammer/aide.html • Commercial HIDS • Tripwire - www.tripwire.com • eEye Blink - www.eeye.com • Symantec Host IDS - www.symantec.com

  4. Intrusion Prevention/Protection • Open Source IPS • Lak-IPS - lak-ips.sourceforge.net • Commercial IPS • ISS Preventia - www.iss.net • ForeScout Active Scout - www.forescout.com • Netscreen IDP - www.netscreen.com • McAfee IntruShield - www.networkassociates.com

  5. IDS Service Centers • Mynetwatchman - www.mynetwatchman.com • DShield - www.dshield.org • Internet Storm Center - isc.sans.org

  6. System Logs • Firewall logs • Audit logs • System logs • TCP wrappers logs • Web server logs • SMTP server logs • FTP server logs

  7. Snort NIDS • Open Source • Home page - www.snort.org • Supports UNIX and Windows • Requires packet capturing library libpcap. • Signature based • Has many frontends and plugins

  8. Building Snort • Build libpcap if require. • Obtain source code from www.snort.org. • Unpack source tar ball. • $ ./configure • $ make • $ make install • Binary installs in /usr/loca/bin/snort.

  9. Configuring Snort • # adduser -u 6000 -g snort -c “Snort IDS” snort • # cd /home/snort; mkdir etc logs rules • # cp rules/*.rules /home/snort/rules • # cp etc/snort.conf etc/*.config /home/snort/etc • Edit /home/snort/etc/snort.conf. • Create init script for launching snort at boot time. • Schedule log rotation and cleanup.

  10. Running Snort • # /usr/local/bin/ntpdate -s -t 10 ntp.alaska.edu • # /sbin/ifconfig eth0 promisc • # /usr/local/bin/snort -u snort -g snort -l /home/snort/logs -d -D -i eth0 -c /home/snort/etc/snort.conf • ps -ax | grep snort • tail /var/log/messages • Setup cron job to synchronize clock.

  11. Using Snort • Passive or active detection • Active detection requires beefy machine and port mirroring. • Alerts and portscan logs • Warn sysadmins and security staff. • Alert source ISP. • Trend analysis • What is being exploited. • Data for security reports.

  12. Reporting Intrusion Attempts • Required information • Date and Time • Time Zone • Source IP, Port and Protocol • Destination IP and Port • Flags • Packet content containing exploit

  13. Whom to Report • Search whois database • whois.arin.net (North America & Academia) • whois.ripe.net (Europe, Middle East & Africa) • whois.apnic.net (Asia Pacific) • whois.krnic.net (South Korea) • whois.nic.ad.jp (Japan) • whois.twnic.net (Taiwan) • whois.lacnic.net (Latin America) • whois.nic.br (Brazil)

  14. Questions and Comments • Questions and comments about IDS/IPS • Questions and comments about Snort.

More Related