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April 25, 2000 John Kristoff 1
DePaul University
A Network Case StudyJohn Kristoff <jtk@depaul.edu>http://condor.depaul.edu/~jkristof/
April 25, 2000 John Kristoff 2
Organizational Structure
April 25, 2000 John Kristoff 3
Another View
April 25, 2000 John Kristoff 4
Network OverviewSpring 1999
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Network OverviewSpring 2000
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Gigabit WAN
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Lincoln Park Infrastructure
Expansion and RenovationNetwork Connectivity CostsNetwork Connectivity Options
Approximately 30 buildings to connect!
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Network SecuritySpring 1999
DNS server compromised - GAME OVER!
Lack of awareness/expertiseNo computer security person/teamSecurity incidents were never
reported by an I.S. staff member
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Network SecurityFirst Steps
Compromised systems rebuiltRouters/Switches securedRouter filters appliedNetwork equipment logging enabledScare tactics used
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Computer SecurityToday
Incident response team formedDirective from VPUse of encryption increasingStaff participating in training and
industry eventsRegular network security auditsAwareness is built!
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Computer SecurityTomorrow
Sophisticated intrusion detection system
Firewalls in front of key resourcesMembership into FIRST.orgMore encryptionRevised and updated policiesMore secure systems and network!
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Bandwidth Management
Internet bandwidth is our last mileDifficult to provide fairnessResNet
many shared LANs many users suffer!
Throw bandwidth at the problem?No silver bullet today
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Some of My Favorite Network Tools
MRTGNetflow datasyslogNTPnmappacket capture (Sniffer, tcpdump, etc.)documentation!