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67 lines
2.2 KiB
Markdown
67 lines
2.2 KiB
Markdown
---
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title: "13-pen-testing-2"
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aliases:
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tags:
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- conp210
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- lecture
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---
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# Intrusion detection cont.
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## Auditing
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a thorough prces of investiagtina nd analaysing aa system for vilnerabilities
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- e.g., pen testing
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-
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can also refer to logging (esp. in a databse context)
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## Firewalls
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protect aginst network intrusions
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- built in or third party
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- built in - integration quality of control. ofen light convenince features maybe no GUI
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- black/whitelist
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- mandatory access control on routers
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- mandatory access control
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- e.g., block a netork port
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- block icmp packets (some sytems are vulnerable)
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- application level filtering for desktop systems
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- finer grained control for linking rules to applications themselves (processes)
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- router doesn't know about applications
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- may not trust an aplication to connect o a web server but do trust other.
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- dont have to block everything on that webserver
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- provide altering and logging (avoid crying wolf)
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- "end user alert fatigue"
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> northcutt and novak - network intrusion detection
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## Intrustion detection systems
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- often bundled with commercial routers, network storage devices (NAS, SAN) - "cloud storage within organisation"
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- can also be host based (HIDS) "situated aroud network"
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- intrusion can be identified by know signatures (like pattern-based virus scanners)
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- can also be anomaly-based (using heuristics)
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## other intrusion detection topics
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- file integrity checking
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- hash checking to detect changes
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- backup and recovery
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## keeping up to date with vulnerabilites
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- CERT NZ
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- US-CERT
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- CVE at MITRE
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- NVD (us NIST national vulnerabilities database)
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- conferences such as DEF CON
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# Sting operations
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deliberately place sofware where it will interact with attacks, somewhat resembling a police sting operation.
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## Honeypot
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- decoy service used to attact attackers
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- divert attackers from real service
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- identify attack origin - analyse attack - create countermeasures
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- honey-nets - co-ordiniated honeypots. - analyse malware infection behaviour (malware epidemiology)
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- bogus email address lists to hinder spammers
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- individual e-mail address can be used to gather and analyse spam smessages
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## Tarpits
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- similar to honeypots but for *slowing* attack not diverting
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- often deployed as a proxy server in front of the real service |