vault backup: 2022-09-15 21:32:40

content/notes/13-pen-testing-2.md

@@ -6,7 +6,7 @@ tags:
 - lecture
 ---
 
-
+# Intrusion detection cont.
 ## Auditing
 a thorough prces of investiagtina nd analaysing aa system for vilnerabilities 
 - e.g., pen testing
@@ -21,6 +21,47 @@ protect aginst network intrusions
 - mandatory access control on routers
 	- mandatory access control
 		- e.g., block a netork port
-		- block icmp p
+		- block icmp packets (some sytems are vulnerable)
 - application level filtering for desktop systems
-- provide altering and logging (avoid crying wolf)
+	- finer grained control for linking rules to applications themselves (processes)
+	- router doesn't know about applications
+	- may not trust an aplication to connect o a web server but do trust other.
+	- dont have to block everything on that webserver
+- provide altering and logging (avoid crying wolf)
+	- "end user alert fatigue"
+
+> northcutt and novak - network intrusion detection
+
+
+## Intrustion detection systems
+- often bundled with commercial routers, network storage devices (NAS, SAN) - "cloud storage within organisation"
+- can also be host based (HIDS)  "situated aroud network"
+- intrusion can be identified by know signatures (like pattern-based virus scanners)
+- can also be anomaly-based (using heuristics)
+
+## other intrusion detection topics
+- file integrity checking
+	- hash checking to detect changes
+- backup and recovery
+
+## keeping up to date with vulnerabilites
+- CERT NZ
+- US-CERT
+- CVE at MITRE
+- NVD (us NIST national vulnerabilities database)
+- conferences such as DEF CON
+
+# Sting operations
+deliberately place sofware where it will interact with attacks, somewhat resembling a police sting operation.
+
+## Honeypot
+- decoy service used to attact attackers
+- divert attackers from real service
+- identify attack origin - analyse attack - create countermeasures
+- honey-nets - co-ordiniated honeypots. - analyse malware infection behaviour (malware epidemiology)
+- bogus email address lists to hinder spammers
+- individual e-mail address can be used to gather and analyse spam smessages
+
+## Tarpits
+- similar to honeypots but for *slowing* attack not diverting
+- often deployed as a proxy server in front of the real service