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Session 03-Intrusion Detection

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Session 03-Intrusion Detection

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Subject : Security and Privacy Risks in Computer & Internet Applications
Lecturer: Assoc. Prof. Dr. James Joshi
Faculty: Graduate School of Information Technology
Siam University, Bangkok, Thailand

Created by

Prince Parham
Prince Parham
Thailand

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Session 03-Intrusion Detection
 

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Session 03-Intrusion DetectionOnline version

Subject : Security and Privacy Risks in Computer & Internet Applications Lecturer: Assoc. Prof. Dr. James Joshi Faculty: Graduate School of Information Technology Siam University, Bangkok, Thailand

by Prince Parham
1

sniffing firewall overloading suspicious signatures TCP destination hijacked

1 . Common security attacks and their countermeasures :
Finding a way into the network
Firewalls
Exploiting software bugs , buffer overflows
Intrusion Detection Systems
Denial of Service
Ingress filtering , IDS
hijacking
IPSec
Packet
Encryption ( SSH , SSL , HTTPS )
Social problems
Education

2 . A is like a castle with a drawbridge
Only one point of access into the network
This can be good or bad . It can be hardware or software

3 . Intrusion Detection :
Used to monitor for " activity " on a network and it can protect against known software exploits , like buffer overflows .

4 . Intrusion detection :
Uses " intrusion "
Well known patterns of behavior
Ping sweeps , port scanning , web server indexing , OS fingerprinting , DoS attempts , etc .

5 . Denial of Service Attack :
Purpose : Make a network service unusable , usually by the server or network
Many different kinds of DoS attacks
SYN flooding
SMURF
Distributed attacks
Mini Case Study : Code - Red

6 . TCP attacks :
Recall how IP works ?
End hosts create IP packets and routers process them purely based on address alone
Problem : End hosts may lie about other fields which do not affect delivery

7 . If an attacker learns the associated TCP state for the connection , then the connection can be !

 
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