Part 5. Firewall
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Part 5. Firewall

Table of Contents

38. Selecting Firewall Rulesets

38.1. Rulesets on LAN

38.2. Rulesets for the Internet

38.3. Packet Routes Through the Firewall

38.3.1. Packet Routes on the LAN and Internet
38.3.2. Packet Routes for VPN Connections

39. Firewall Profile

39.1. General Basic LAN Rules
39.2. Client Profiles
39.3. Provider profile

40. Full Rulesets

40.1. Components

40.1.1. Services
40.1.2. Netgroups
40.1.3. Automatic Objects

40.2. Rulesets

40.2.1. Default Settings
40.2.2. Passing Through the Ruleset
40.2.3. Linking Rule Criteria
40.2.4. The Actions
40.2.5. Extra Options
40.2.6. Special Features of Provider Rulesets

41. Additional Functions

41.1. Checking MAC Addresses
41.2. Preventing LAN spoofing
41.3. Blocking IPs After Too Many Login Errors
41.4. Firewall Emergency Mode

42. Case Studies and Examples

42.1. Example 1: Extending a Simple Client Profile

42.1.1. Sample Solution

42.2. Example 2: Port Forwarding Only Accessible from an External IP

42.3. Example 3: Separate Guest Network

42.3.1. Sample Solution

42.4. Example 4: Restricted Access from the VPN

42.5. Example 5: Web Server in the DMZ

42.5.1. Sample Solution

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