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D-Link NetDefend Firewall Series User manual

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Configuration examples for the D-Link
NetDefend Firewall series
Scenario: How to configure IPSec VPN LAN-to-LAN Tunnel
Platform Compatibility: All NetDefend Firewall Series
Last update: 2008-03-07
Overview
In this document, the notation Objects->Address book means that in the tree on the left
side of the screen Objects first should be clicked (expanded) and then Address Book.
Most of the examples in this document are adapted for the DFL-800. The same settings can
easily be used for all other models in the series. The only difference is the names of the
interfaces. Since the DFL-1600 and DFL-2500 has more than one lan interface, the lan
interfaces are named lan1, lan2 and lan3 not just lan.
The screenshots in this document is from firmware version 2.12.00. If you are using an
earlier version of the firmware, the screenshots may not be identical to what you see on
your browser.
How to configure IPSec VPN LAN-to-LAN Tunnel
Create one lan-to-lan IPsec VPN tunnel between firewall A and B.
1. Firewall A - Addresses
Go to Objects -> Address book -> InterfaceAddresses.
Edit the following items:
Change lan_ip to 192.168.1.1
Change lannet to 192.168.1.0/24
Change wan1_ip to 192.168.110.1
Change wan1net to 192.168.110.0/24
Go to Objects -> Address book.
Add a new Address Folder called RemoteHosts.
In the new folder, add a new IP address:
Name: fwB-remotenet
IP Address: 192.168.2.0/24
Click Ok
In the same folder, add a new IP address:
Name: fwB-remotegw
IP Address: 192.168.110.2
Click Ok
2. Firewall A – Pre-shared keys
Go to Objects -> Authentication Objects
Add a new Pre-Shared Key.
General:
Name: fwB-psk
Shared secret:
Select Passphrase and enter a shared secret
Click Ok.
3. Firewall A – IPsec interface
Go to Interfaces -> IPsec.
Add a new IPsec Tunnel.
In the General tab:
General:
Name: fwB-ipsec
Local Network: lannet
Remote Network: fwB-remotenet
Remote Endpoint: fwB-remotegw
Encapsulation Mode: Tunnel
Algorithms:
IKE Algorithms: High
IKE Life Time: 28800
IPsec Algorithms: High
IPsec Life Time: 3600
IPsec Life Time: 0
In the Authentication tab:
Authentication:
Select Pre-Shared Key and fwB-psk.
Click Ok.
4. Firewall A – Rules
Go to Rules -> IP Rules.
Create a new IP Rules Folder called lan_to_fwB-ipsec
In the new folder, create a new IP Rule.
In the General tab:
General:
Name: allow_all
Action: Allow
Service: all_services
Address Filter:
Source Interface: lan
Source Network: lannet
Destination Interface: fwB-ipsec
Destination Network: fwB-remotenet
Click Ok.
Create a second rule in the same folder.
In the General tab:
General:
Name: allow_all
Action: Allow
Service: all_services
Address Filter:
Source Interface: fwB-ipsec
Source Network: fwB-remotenet
Destination Interface: lan
Destination Network: lannet
Click Ok.
Save and activate the configuration on firewall A.
5. Firewall B - Addresses
Go to Objects -> Address book -> InterfaceAddresses.
Edit the following items:
Change lan_ip to 192.168.2.1
Change lannet to 192.168.2.0/24
Change wan1_ip to 192.168.110.2
Change wan1net to 192.168.110.0/24
Go to Objects -> Address book.
Add a new Address Folder called RemoteHosts.
In the new folder, add a new IP4 address:
Name: fwA-remotenet
IP Address: 192.168.1.0/24
Click Ok
In the same folder, add a new IP4 address:
Name: fwA-remotegw
IP Address: 192.168.110.1
Click Ok
6. Firewall B – Pre-shared keys
Go to Objects -> Authentication Objects.
Add a new Pre-Shared Key.
General:
Name: fwA-psk
Shared secret:
Select Passphrase and enter a shared secret
Click Ok.
7. Firewall B – IPsec interface
Go to Interfaces -> IPsec.
Add a new IPsec Tunnel.
In the General tab:
General:
Name: fwA-ipsec
Local Network: lannet
Remote Network: fwA-remotenet
Remote Endpoint: fwA-remotegw
Encapsulation Mode: Tunnel
Algorithms:
IKE Algorithms: High
IKE Life Time: 28800
IPsec Algorithms: High
IPsec Life Time: 3600
IPsec Life Time: 0
In the Authentication tab:
Authentication:
Select Pre-Shared Key and fwA-psk.
Click Ok.
8. Firewall B – Rules
Go to Rules -> IP Rules.
Create a new IP Rules Folder called lan_to_fwA-ipsec
In the new folder, create a new IP Rule.
In the General tab:
General:
Name: allow_all
Action: Allow
Service: all_services
Address Filter:
Source Interface: lan
Source Network: lannet
Destination Interface: fwA-ipsec
Destination Network: fwA-remotenet
Click Ok.
Create a second rule in the same folder.
In the General tab:
General:
Name: allow_all
Action: Allow
Service: all_services
Address Filter:
Source Interface: fwA-ipsec
Source Network: fwA-remotenet
Destination Interface: lan
Destination Network: lannet
Click Ok.
Save and activate the configuration on firewall B.