Intra2net Administrator Manual
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Intra2net Administrator Manual

Intra2net AG

The contents of this manual have been prepared with care. However, the information in this manual is not a warranty of product performance. Intra2net AG shall only be liable to the extent of its sales and delivery conditions and shall not assume any liability for technical inaccuracies and/or omissions. The information in this manual is subject to change without notice. Additional information, as well as changes and version information for Intra2net systems can be found online at https://www.intra2net.com

The Intra2net system establishes communication connections depending on the configuration. In order to avoid unwanted charges and data loss, the product should be monitored and backed up at regular intervals. Intra2net accepts no responsibility for loss of data, accidental connection costs or damage caused by the unattended operation of the product.

Intra2net and the Intra2net logo are registered trademarks of Intra2net AG. Company and product names are mostly trademarks of their respective companies or manufacturers.

Copyright © 1999-2024 Intra2net AG. All rights reserved. No part of this manual may be reproduced or reused in any form whatsoever without prior written permission from Intra2net AG.

          Intra2net AG
          Mömpelgarder Weg 8
          72072 Tübingen
          Germany

Valid for Intra2net software version 6.12.0

Valid for Intra2net Groupware Client Version 5.0.2

11. April 2024

Table of Contents

1. Installation

1.1. About this Manual
1.2. Factory Settings

2. Installation on Own Hardware

2.1. Hardware Selection

2.2. Installing as a Virtual Machine

2.3. Location

2.6. Installation of the operating system

2.6.1. Installation from a USB flash drive
2.6.2. Installation from DVD
2.6.3. Start of the installation
2.6.4. Serial console
2.6.5. Solving Compatibility Problems

3. Installing as a Virtual Machine

3.1. Comparison to Real Hardware

3.1.1. Inconsistent performance speed
3.1.2. Lower I/O Performance
3.1.3. Contact with Unfiltered Network Packets

4. Installation on VMware vSphere Hypervisor 4 (ESXi)

4.1. Virtual Machine Configuration
4.2. Virtual Machine with Direct Internet Access
4.3. Installing the Intra2net System

5. Installation of Microsoft Hyper-V on Windows Server 2012 R2

5.1. Virtual Machine Configuration
5.2. Installation of the Intra2net System

6. The Console

6.1. Intra2net Appliance Micro
6.2. Network Cards
6.3. DNS and DHCP
6.4. Firewall Emergency Mode
6.5. Restore to Factory Settings
6.6. The Root Password
6.7. The Linux Shell

7. The Web Interface

7.1. Accessing the Web Interface
7.2. License Code
7.3. The Main Page
7.4. The Queue
7.5. The Configuration Check
7.6. Shutdown necessary

2. General Functions

8. Intranet

8.1. IPs and Networks

8.2. VLAN Tagging

8.3. Access Rights of a Network Object

8.4. Domain and DNS

8.4.1. The Intra2net system as local DNS server
8.4.2. Integrate another DNS server in the LAN
8.4.3. Forward DNS to Other Domains
8.4.4. Prevent DNS Rebind

8.5. Registering Clients

8.5.1. Wake-On-LAN
8.5.2. DHCP

8.6. DHCP-Server

8.7. Entering Ranges

8.8. Import/Export Client Profiles

8.8.1. Importing Clients
8.8.2. Exporting Clients

8.9. Intranet Routing

9. SSL Encryption and Certificates

9.1. Principles and Dangers of SSL Encryption

9.2. Correctly Creating Certificates

9.2.1. The Computer Name
9.2.2. Configuration

9.3. Installing Certificates on Clients

9.3.1. Installation with Windows
9.3.2. Distributing Certificates via Active Directory

9.4. User Education and Awareness

9.5. Using an External Certificate Authority

9.5.1. Certificates from Let's Encrypt
9.5.2. Certificates from classic certification authorities

9.6. Key Import

9.7. Encryption Strength

10. Internet

10.1. Dial-up with DSL (PPPoE)

10.2. Dial-up with DSL (PPTP)

10.3. Router with static IP

10.4. Router with DHCP or Cable Modem

10.5. Router on the Local Network

10.6. Router vs. Modem

10.7. Official IPs and DMZs

10.7.1. Classic Routing
10.7.2. Static NAT
10.7.3. Proxy-ARP

10.8. Automatic Connection

10.9. Connection Monitoring

10.10. Switching to Other Providers in the Event of an Error (Fallback)

10.11. Bandwidth Management and VoIP Prioritization

10.11.1. Bandwidth Management
10.11.2. Prioritize VoIP and Real-time Data

10.12. Masquerading / NAT

10.13. DynDNS

10.13.1. Providers
10.13.2. Updates and the IP Address Used

10.14. External access

11.1. Overview

11.2. Access to the Proxy

11.3. Proxy Configuration

11.4. URL Filter

11.4.1. Proxy Profile
11.4.2. Proxy Access Lists
11.4.3. Time Management

11.5. Web Content Filter

11.6. Proxy Virus Scanner

12. Statistics and Data Privacy

12.1. Proxy Statistics

12.1.1. Proxy Logging
12.1.2. Analysis
12.1.3. Methodology

12.2. Internet Access Statistics

12.2.1. Methodology

12.3. Speedometer

12.3.1. Methodology
12.3.2. Sites
12.3.3. Data Privacy

12.4. Space Usage Statistics

12.5. Data Privacy

13. Usermanager

13.1. User Groups

13.1.1. Access Rights
13.1.2. Administration Rights

13.2.1. Settings for Email and Groupware

13.3. Import/export of User Profiles

13.3.1. Importing Users
13.3.2. Exporting Users

14.1. Email Relay

14.1.1. Rights
14.1.2. SMTP-Submission
14.1.3. Dispatch Methods
14.1.4. Dispatch via relay server
14.1.5. Direct Dispatch
14.1.6. Choosing the dispatch method

14.2. Receiving emails on the client (POP or IMAP)

14.3. Receive emails using the Intra2net system

14.3.1. Methods
14.3.2. Retrieving individual POP accounts
14.3.3. Direct delivery via SMTP
14.3.4. Retrieval of collective POP accounts (multidrop)

14.4. Forwarding of entire domains

14.4.1. Method
14.4.2. Recipient Address Check
14.4.3. Forwarding of individual POP accounts

14.5. Email Addressing

14.5.1. Address Settings
14.5.2. Email Addresses and Aliases

14.6. Email Processing

14.6.1. Forwarding
14.6.2. Automatic Response
14.6.3. Sorting
14.6.4. Automatic deletion

14.7. Emailfilter

14.7.1. Spamfilter
14.7.2. Virus Scanner
14.7.3. Attachment Filter

14.8.1. Basic principles
14.8.2. Implementation
14.8.3. Further standards
14.8.4. Prerequisites for use
14.8.5. Configuration
14.8.6. Filtering and quarantine
14.8.7. Header lists and exceptions
14.8.8. Rotate the key

14.9. Archiving

14.9.1. Interface
14.9.2. Connecting the MailStore Server

14.10. Automatic Transfer

14.11. Mailinglist

14.12. Additional Settings

14.13. Queue

14.14. Structure of the mail system

14.15. Differences between licenses

15. Services

15.1. Timeserver
15.2. Monitoring via SNMP

16. System Functions

16.1. License

16.1.1. Demo Mode
16.1.2. License Code
16.1.3. Update Period

16.2. Updates

16.2.1. Remote Update via Partner Web
16.2.2. Rescue System

16.3. Backup

16.3.1. Backup protection
16.3.2. Storage period
16.3.3. Remote Storage
16.3.4. Restore
16.3.5. Procedure for Hard Drive Damage or Hardware Replacement
16.3.6. Hardware migration with Intra2net support
16.3.7. Standby systems

16.4. Operation Behind Firewall

16.5. Logfiles

16.6. Logcheck Reports

16.7. Scheduled Shutdown

16.8. Inspection and repair of filesystems

3. Groupware Client

17. Introduction

17.1. System Requirements
17.2. Overview of Features
17.3. Known Limitations

18. Installation

18.1. Installing the Program
18.2. Distributing the Program via Active Directory
18.3. Switch from 32 bit to 64 bit

19. Setting up a Profile

20. Account Configuration

20.1. Groupware Account

20.1.1. Activate Certificate Check
20.1.2. Deactivating the Search Indexer

20.2. Importing Existing Data

20.2.1. Importing Using Outlook Import
20.2.2. Importing Larger Amounts of Emails

20.3. Setting up Multiple Accounts and Email Addresses

20.3.1. Multiple Server Accounts
20.3.2. Multiple Outgoing Mail Identities

20.4. Converting Previous Installations of the Groupware Client

21. Linking Folders

21.1. Linking Own Folders

21.1.1. Automatic registration
21.1.2. Excluding Folders from Synchronization
21.1.3. Update folder list

21.2. Linking Shared Folders

22. Sharing Folders

22.1. Rights
22.2. Read Status Shared/Individual

23. Folder Linking Expert Mode

23.1. Linking Shared Folders

23.2. Manual folder linking

23.2.1. Switching to Manual Linking
23.2.2. Linking an Individual Folder
23.2.3. Unlinking a folder

24. Additional Features

24.1. Folder Hierarchy and ibx_sub

24.2. Folder Options

24.3. Editing Server-Side Settings

24.4. Categories and color assignment

24.4.1. Recommendation for shared color assignment
24.4.2. Reset local color assignment
24.4.3. Changing an existing color assignment

24.5. Use Free/Busy Information

24.5.1. Outlook 2010 to 2021
24.5.2. Outlook 2007

24.6. Marking as Private

24.7. Reminders in Shared Folders

24.8. User-Defined Fields in Contacts

24.9. Showing Item Source Text

24.10. Backup Folders

24.10.1. Backup Data after Restore
24.10.2. Backup of local data when resetting to automatic mode

24.11. Advice to the User

24.12. Log files

24.12.1. Submitting log files to support

25. Advanced Email Configuration

25.1. Retrieve Emails Completely or Only Headers
25.2. Notification of New Emails
25.3. Marking Moved Emails as Read
25.4. Email Reminders and Tracking
25.5. Read receipts

26. Compatibility and Collaboration

26.1. Personal firewalls on the Client

26.2. Virus Scanner on the Client

26.3. Compatibility with PDAs and Mobile Phones

26.4. Other Programs

26.4.1. Incompatible Addins

26.5. Automatic detection of compatibility problems

27. Concept for public folders

27.1. Setup
27.2. Emails

28. Migrating Emails with IMAPCopy

29. Migration from Microsoft Exchange

29.1. Offline Migration

29.1.1. Migration Step-by-step

29.2. Migration During Operation

29.2.1. Preparing for Migration
29.2.2. Migrating Individual Users
29.2.3. Shared Folders
29.2.4. Final steps

30. Reference Information

30.1. Synchronizable data

30.1.1. Tasks
30.1.2. Meetings
30.1.3. Notes
30.1.4. Contacts
30.1.5. Contact Groups
30.1.6. Emails
30.1.7. All Items

30.2. Advanced Registry Settings

30.2.1. Store Settings
30.2.2. Addin Settings

30.3. Data Formats

4. Web-Groupware and ActiveSync

31. Introduction to Web Groupware

31.1. The Display Modes

32.1. Reading and Editing Emails

32.1.1. Displaying Emails
32.1.2. Deleted Emails
32.1.3. Exporting Emails

32.2. Sending Emails

32.2.1. New Message
32.2.2. Append Signatures

32.3. Managing Folders

32.3.1. Folder Hierarchy
32.3.2. Organizing Folders
32.3.3. Subscribing to Folders
32.3.4. Sharing Folders

33. Address Book

34. Connecting Mobile Devices using ActiveSync

34.1. Introduction

34.2. Server Settings

34.3. Special Features and Tips

34.3.1. Deleting Emails on the Server
34.3.2. Synchronization Steps
34.3.3. Manage and Resynchronize Devices
34.3.4. Synchronize Multiple Calendars or Contact Lists

35. ActiveSync with Android Devices

36. ActiveSync with Apple iOS Devices

37. Reference Information

5. Firewall

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

43. IPSec Basics

43.1. IPSec
43.2. Public-Key Cryptography
43.3. Certificates
43.4. IPSec connections
43.5. Algorithms
43.6. Limitations
43.7. Compatibility with Other IPSec Peers

44. Key Management

44.1. Own Keys

44.1.1. Certificate Authorities (CAs)

44.2. Foreign Keys

45. Connecting Individual PCs

45.1. Method

45.2. Preparing the configuration on the Intra2net system

45.2.1. Create certificate
45.2.2. Default settings for new connections

45.3. Automatic configuration for clients on the Intra2net system

45.4. Manual configuration on the Intra2net system

45.4.1. Prerequisites
45.4.2. Default Settings
45.4.3. Authentication
45.4.4. Configuring the Tunnel
45.4.5. Rights
45.4.6. Activation

46. VPN with the NCP Secure Entry Windows Client

46.1. Import
46.2. Establish connection
46.3. Connection protocols

47. VPN with the Shrew Soft VPN Client

47.1. Import
47.2. Establishing Connection
47.3. Connection Protocols

48. VPN with Mac OS X

48.1. Installation
48.2. Generating Certificates
48.3. Importing Certificates
48.4. Configuring Connections
48.5. Intra2net System

49. VPN with the NCP Secure Entry macOS Client

50. VPN with the Apple iOS devices

51. VPN with Android

51.1. Preparing the Device
51.2. Connection on the Intra2net System
51.3. Certificates
51.4. Connecting with Android
51.5. Simplify Connection Setup

52. VPN with the NCP Secure Android Client Premium

53. Connecting Complete Networks

53.1. Method

53.2. Configuration on the Intra2net System

53.2.1. Prerequisites
53.2.2. Default Settings
53.2.3. Authentication
53.2.4. Configuring the Tunnel
53.2.5. Rights
53.2.6. Activation

54. VPN with ZyXEL ZyWALL USG

54.1. Overview

54.2. Preparation

54.3. Certificate

54.4. Connection

54.4.1. IKE / Phase 1
54.4.2. IPSec / Phase 2

54.5. Intra2net System

55. VPN with Lancom Routers

55.1. Overview
55.2. Certificate for the Lancom device
55.3. Certificate for the Intra2net System
55.4. Connecting
55.5. Intra2net System
55.6. Deleting Certificates

56. VPN with Linux

56.1. Overview
56.2. Generating Certificates
56.3. Configuring Connections
56.4. Intra2net System

57. Solving IP Address Conflicts in VPNs Through NAT

57.1. The Problem

57.2. Configuration

57.3. Same IPs on LAN and Peer

57.3.1. Implementation

57.4. Multiple Peers with the Same IPs

57.4.1. Implementation

57.5. Local IPs Defined by Service Provider for Remote Maintenance

57.5.1. Implementation

58. Error Diagnosis

58.1. Reading Logs
58.2. The Protocol Format of the Intra2net System
58.3. Error in Phase 1
58.4. Error in Phase 2

7. Appendix

A. Licenses

A.1. Intra2net Software License Agreement

A.2. Licensed software

A.3. Notes on return and disposal

A.3.1. Separate collection of old equipment
A.3.2. Batteries and accumulators and lamps
A.3.3. Options for the return of old equipment
A.3.4. Data privacy notice
A.3.5. Meaning of the crossed out trash can symbol
A.3.6. Free collection of used batteries
A.3.7. Meaning of the battery symbols

B.1. Intra2net Groupware Client License Agreement (EULA)

B.2. Licensed Software

B.2.1. Info-ZIP
B.2.2. JsonCpp

List of Examples

14.1. Sample excerpt from an email header with a normal envelope header
14.2. Sample excerpt from an email header with Qvirtual header

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