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3 Cards in this Set
- Front
- Back
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3 main design goals |
All traffic must pass through Only authorise traffic defined by local security policy will pass Firewall itself immune to penetration |
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4 techniques used |
Service control: services that can be accessed on the internet Direction control: which direction a particular service request may be initiated, inbound or outbound User control: filter depending on user accessing Behaviour control: filters how particular services may be used, filter of spam based on header etc |
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Common limitations |
Doesn't prevent Internal threat Typically doesn't protect against viruses or malicious code Cannot protect against traffic which bypasses them e.g WLAN Configuration can be challenging |
