D-Link DFL- 860 podręczniki

D link DFL- 860 Instrukcja Użytkownika (355 strony)

Marka: D-link | Kategoria: Zapory sprzętowe | Rozmiar: 7.47 MB |

Angielski

Spis treści

User Manual

1

NetDefendOS version 2.20

2

Copyright Notice

3

Disclaimer

3

Limitations of Liability

3

Table of Contents

4

List of Figures

9

List of Examples

10

Intended Audience

12

Examples

12

Important

13

Chapter 1. Product Overview

14

1.2. NetDefendOS Architecture

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1.2.3. Basic Packet Flow

17

2.1.1. Overview

23

Management Interfaces

23

Creating New Accounts

24

2.1.3. The CLI

24

Serial Console CLI Access

24

SSH (Secure Shell) CLI Access

25

Logging on to the CLI

25

Changing the CLI Prompt

25

Logging off from the CLI

26

2.1.4. The WebUI

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Multi-language Support

27

The Web Browser Interface

27

Interface Layout

27

Listing Modified Objects

32

Committing IPsec Changes

33

2.2.1. Overview

35

2.2.2. Event Messages

35

2.2.3.2. SNMP Traps

37

2.3.1. Overview

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START Message Parameters

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STOP Message Parameters

40

2.3.9. Limitations with NAT

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2.4. Monitoring

43

Remote Access Encryption

44

Preventing SNMP Overload

44

2.5. Maintenance

45

Web Interface

46

Chapter 3. Fundamentals

48

3.1.3. Ethernet Addresses

50

3.1.4. Address Groups

51

3.2. Services

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Max Sessions

54

Using All Services

54

3.2.3. ICMP Services

55

3.3.1. Overview

57

The any and core interfaces

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3.3.2. Ethernet

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Ethernet Interface Names

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Ethernet IP Addresses

59

The Default Gateway

59

3.3.3. VLAN

60

3.3.4. PPPoE

61

The PPPoE interface

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IP address information

62

User authentication

62

Dial-on-demand

62

3.3.5. GRE Tunnels

63

GRE and the IP Rule Set

64

An Example GRE Scenario

64

3.3.6. Interface Groups

66

3. Click OK

67

3.4. ARP

68

Flushing the ARP Cache

69

Size of the ARP Cache

69

Static ARP Entries

70

Published ARP Entries

70

3.4.5. Advanced ARP Settings

71

Sender IP 0.0.0.0

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Matching Ethernet Addresses

72

3.5.1. Security Policies

73

Policy Characteristics

73

IP Rules

74

3.5.2. IP Rule Evaluation

74

Stateful Inspection

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The First Matching Principle

74

Non-matching Traffic

74

3.5.3. IP Rule Actions

75

Bi-directional Connections

75

Using Reject

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3.6. Schedules

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3.7.1. Overview

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Certificates with VPN Tunnels

79

Certificate Components

79

Certification Authorities

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Validity Time

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Certificate Revocation Lists

80

Trusting Certificates

80

Identification Lists

80

Reusing Root Certificates

80

3.7.2. X.509 Certificates in

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NetDefendOS

81

3.8. Setting Date and Time

82

3.8.2. Time Servers

83

Maximum Time Adjustment

85

Synchronization Intervals

85

D-Link Time Servers

86

3.9. DNS Lookup

87

4.2. Static Routing

90

4.2.2. Static Routing

91

The Route Lookup Mechanism

91

NetDefendOS Route Notation

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Displaying the Routing Table

92

Core Routes

93

4.2.3. Route Failover

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Setting the Route Metric

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Multiple Failover Routes

95

Failover Processing

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Re-enabling Routes

95

4.2.4. Proxy ARP

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4.3.1. Overview

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4.3.5. The Ordering parameter

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4.4. Dynamic Routing

103

4.4.2. OSPF

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Overview

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OSPF Areas

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The Designated Router

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Neighbors

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Aggregates

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Virtual Links

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A Partitioned Backbone

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4.4.3. Dynamic Routing Policy

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4.5.1. Overview

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SAT Multiplex Rule

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Chapter 4. Routing

112

4.5.3. IGMP Configuration

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Figure 4.7. Multicast Proxy

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Advanced IGMP Settings

118

4.6. Transparent Mode

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Scenario 1

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Scenario 2

122

Chapter 5. DHCP Services

127

5.2. DHCP Servers

128

5.3. Static DHCP Assignment

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5.4. DHCP Relaying

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Basic IP Pool Options

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Advanced IP Pool Options

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Using Prefetched Leases

133

6.1.1. Introduction

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The Default Access Rule

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6.1.2. IP spoofing

135

6.1.3. Access Rule Settings

136

6.2.1. Overview

138

Deploying an ALG

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Maximum Connection Sessions

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ALGs and Syn Flood Protection

139

6.2.2. HTTP

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Deploying an HTTP ALG

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6.2.3. FTP

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FTP Connections

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Connection Modes

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FTP Security Issues

140

The Solution

141

6.2.4. TFTP

145

General TFTP Options

146

TFTP Request Options

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Allowing Request Timeouts

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6.2.5. SMTP

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SMTP ALG Options

146

6.2.5.1. DNSBL SPAM Filtering

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Tagging SPAM Emails

148

Dropping SPAM Email

149

Verifying the Sender Email

149

Network Setup

150

Setup Summary

150

The dnsbl CLI Command

150

6.2.6. POP3

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POP3 ALG Options

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Anti-Virus Options

152

6.2.7. SIP

152

SIP Components

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SIP Media-related Protocols

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SIP Usage Scenarios

153

SIP Configuration Options

153

SIP Setup Summary

154

Handling Data Traffic

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6.2.8. H.323

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H.323 Components

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H.323 Protocols

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H.323 ALG features

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H.323 ALG Configuration

157

6.3.1. Overview

169

Wildcarding

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URL Processing Flow

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Activation

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Audit Mode

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Allowing Override

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Category 1: Adult Content

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Category 2: News

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Category 3: Job Search

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Category 4: Gambling

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Category 5: Travel / Tourism

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Category 6: Shopping

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Category 7: Entertainment

178

Category 8: Chatrooms

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Category 9: Dating Sites

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Category 10: Game Sites

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Category 11: Investment Sites

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Category 12: E-Banking

179

Category 15: Politics

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Category 16: Sports

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Category 32: Non-Managed

182

Category 29: Computing/IT

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Category 31: Spam

182

6.4. Anti-Virus Scanning

183

6.4.4. The Signature Database

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6.4.6. Anti-Virus Options

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1. General options

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3. Scan Exclude Option

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4. Compression Ratio Limit

185

Verifying the MIME Type

185

6.5.1. Overview

188

IDP, IPS and IDS

189

6.5.3. IDP Rules

190

Rule Components

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Initial Packet Processing

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Checking Dropped Packets

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6.5.5. IDP Pattern Matching

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6.5.6. IDP Signature Groups

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6.5.7. IDP Actions

194

6.6.1. Overview

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6.6.2. DoS Attack Mechanisms

198

Boink and Nestea

199

6.6.6. The WinNuke attack

199

6.6.8. TCP SYN Flood Attacks

201

6.6.9. The Jolt2 Attack

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Whitelisting

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Protocols Handled by NAT

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Types of NAT Pools

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Stateful NAT Pools

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Stateless NAT Pools

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Fixed NAT Pools

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IP Pool Usage

208

Proxy ARP Usage

208

Using NAT Pools

208

Address (1:1)

211

7.3.4. Port Translation

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7.3.7. SAT and FwdFast Rules

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Proving Identity

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Using Username/Passwords

220

8.2. Authentication Setup

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RADIUS Security

222

8.2.4. Authentication Rules

222

Connection Timeouts

222

Multiple Logins

222

8.2.6. HTTP Authentication

223

Agent Options

224

Setting Up IP Rules

224

Forcing Users to a Login Page

224

Chapter 9. VPN

229

9.1.4. Key Distribution

230

9.2. VPN Quickstart Guide

231

Interface Network Gateway

232

Configuring the IPsec Client

234

9.2.6. PPTP Roaming Clients

236

9.2.7. VPN Troubleshooting

237

The ipsecstat console command

238

The ikesnoop console command

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9.3.1. Overview

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IKE Negotiation

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IKE and IPsec Lifetimes

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IKE Proposals

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IKE Parameters

242

9.3.3. IKE Authentication

245

Manual Keying

245

Certificate Disadvantages

247

AH (Authentication Header)

247

9.3.5. NAT Traversal

248

NAT Traversal Configuration

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9.3.6. Proposal Lists

249

9.3.7. Pre-shared Keys

250

9.3.8. Identification Lists

251

9.4.1. Overview

253

9.4.3. Roaming Clients

253

9.4.3.4. Using Config Mode

257

IP Validation

258

9.5. PPTP/L2TP

260

9.5.2. L2TP

261

9.5.2. L2TP Chapter 9. VPN

262

10.1. Traffic Shaping

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Pipe Rules

268

10.1.6. Precedences

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Allocating Precedence

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Pipe Precedences

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The Best Effort Precedence

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Applying Precedences

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The Need for Guarantees

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10.1.7. Guarantees

274

10.1.9. Groups

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A Simple Groups Scenario

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Group Limits and Guarantees

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10.1.10. Recommendations

276

Pipe limits for VPN

276

Relying on the group limit

276

Attacks on Bandwidth

277

Watching for Leaks

277

Troubleshooting

277

10.2.1. Overview

279

10.2.3. Grouping

279

10.2.4. Rule Actions

279

10.2.6. Exempted Connections

280

10.3.1. Overview

281

10.3.6. SLB_SAT Rules

284

Example 10.3. Setting up SLB

285

Chapter 11. High Availability

289

Extending Redundancy

290

11.3.1. Hardware Setup

293

11.3.2. NetDefendOS Setup

294

Using Individual IPs

296

Failed Interfaces

296

Changing the Cluster ID

296

Chapter 12. ZoneDefense

298

12.2. ZoneDefense Switches

299

12.3.1. SNMP

300

SNMP Managers

300

Managed devices

300

12.3.2. Threshold Rules

300

12.3.4. Limitations

302

Chapter 13. Advanced Settings

304

13.2. TCP Level Settings

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TCPSequenceNumbers

310

ICMPSendPerSecLimit

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SilentlyDropStateICMPErrors

311

13.4. ARP Settings

312

13.6. Connection Timeouts

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Default: False

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13.7. Size Limits by Protocol

318

PseudoReass_MaxConcurrent

320

IllegalFrags

320

DuplicateFragData

320

FragReassemblyFail

321

DroppedFrags

321

DuplicateFrags

321

Default: 60 seconds

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LocalReass_MaxConcurrent

324

LocalReass_MaxSize

324

LocalReass_NumLarge

324

DHCP_MinimumLeaseTime

325

DHCP_ValidateBcast

325

DHCP_AllowGlobalBcast

325

DHCP_UseLinkLocalIP

325

DHCP_DisableArpOnOffer

325

13.11. DHCPRelay Settings

326

DHCPServer_SaveLeasePolicy

327

13.13. IPsec Settings

328

Default: Disabled

329

LogSendPerSecLimit

330

Default: 0

331

TimeSync_DSTStartDate

332

TimeSync_DSTEndDate

332

PPP_L2TPBeforeRules

333

PPP_PPTPBeforeRules

333

Reassembly_MaxConnections

335

Reassembly_MaxProcessingMem

335

BufFloodRebootTime

336

MaxPipeUsers

336

Pre-empting Database Updates

338

Querying Update Status

339

Querying Server Status

339

Deleting Local Databases

339

Appendix D. The OSI Framework

348

Alphabetical Index

351

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