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D-Link DFL-500 [67/122] Configuring the dfl 500 npg as a pptp gateway

D-Link DFL-600 [67/122] Configuring the dfl 500 npg as a pptp gateway

DFL-500 User Manual

PPTP VPN between a Windows client and the DFL-500 NPG

Configuring the DFL-500 NPG as a PPTP gateway

• Create a user group for your PPTP users.

See Users and authentication

• Go to VPN > PPTP > PPTP Range .

• Select Enable PPTP.

•

Enter the Starting IP and the Ending IP for the PPTP address range.

• Select the User Group that you added in step Create a user group for your PPTP users.

• Select Apply to enable PPTP through the DFL-500 NPG.

Содержание

Building networks for people 1
D link dfl 500 1
Network security firewall manual 1
Getting started 10 3
Introduction 8 3
Nat route mode installation 15 3
Table of contents 3
Transparent mode installation 19 3
Firewall configuration 23 4
Users and authentication 43 4
Ipsec vpns 48 5
Pptp and l2tp vpns 66 5
Web content filtering 71 5
Administration 81 6
Logging and reporting 78 6
Glossary 101 7
Index 104 7
Limited warranty 119 7
Registration 122 7
Technical support 116 7
About this document 8
Introduction 8
Nat route mode 8
Nat route mode and transparent mode 8
Transparent mode 8
Customer service and technical support 9
For more information 9
Getting started 10
Mounting 10
Package contents 10
1 lb 0 8 kg 11
8 3 x 6 3 x 1 8 in 21 x 15 x 3 cm 11
Connect the ac adapter to a power outlet the dfl 500 npg starts up the power and status lights light the status light flashes while the dfl 500 npg is starting up and remains lit when the system is up and running 11
Connect the ac adapter to the power connection at the back of the dfl 500 npg 11
Dc input voltage 5 v dc input current 3 a 11
Operating temperature 32 to 104 f 0 to 40 c storage temperature 13 to 158 f 25 to 70 c humidity 5 to 95 non condensing 11
Powering on 11
To power on the dfl 500 npg 11
A computer with an ethernet connection 12
A crossover cable or an ethernet hub and two ethernet cables to connect to the web based manager 12
Connecting to the web based manager 12
Initial configuration 12
Internet explorer version 4 or higher 12
Set the ip address of the computer with an ethernet connection to the static ip address 192 68 and a netmask of 255 55 55 12
The web based manager is the primary tool for installing and configuring your dfl 500 npg configuration changes made with the web based manager are effective immediately without the need to reset the firewall or interrupt service to connect to the web based manager you need 12
When the dfl 500 npg is first powered on it is running in nat route mode and has the basic configuration listed in dfl 500 npg initial power on settings 12
Connecting to the command line interface cli 13
Next steps 14
Completing the configuration 15
Configuring your internal network 15
Connecting to your networks 15
Nat route mode installation 15
Preparing to configure nat route mode 15
This chapter describes how to install your dfl 500 npg in nat route mode if you want to install the dfl 500 npg in transparent mode see transparent mode installation this chapter includes 15
Use nat route mode settings to gather the information that you need to customize nat route mode settings 15
Using the command line interface 15
Using the setup wizard 15
_____ _____ _____ _____ 15
Configuring the dfl 500 npg to run in nat route mode 16
Reconnecting to the web based manager 16
Starting the setup wizard 16
Using the command line interface 16
Using the setup wizard 16
Connecting to your networks 17
Completing the configuration 18
Configuring your internal network 18
Setting the date and time 18
Changing to transparent mode 19
Preparing to configure transparent mode 19
Transparent mode installation 19
Using the setup wizard 19
Changing to transparent mode 20
Configuring the transparent mode management ip address 20
Reconnecting to the web based manager 20
Starting the setup wizard 20
Using the command line interface 20
Configure the transparent mode default gateway 21
Connecting to your network 21
Setting the date and time 21
Firewall configuration 23
Adding nat route mode policies 24
Changing to nat route mode 24
Changing to transparent mode 24
Nat route mode 24
Nat route mode and transparent mode 24
Transparent mode 24
Configure the policy 25
On a policy in the list to add the new policy above a specific policy 25
You can also select insert policy before 25
Arrange policies in the policy list so that they have the results that you expect see configuring policy lists for more information 26
Select ok to add the policy the policy is added to the selected policy list 26
Add transparent mode policies to control the network traffic that is allowed to pass through the firewall when you are running the it in transparent mode 27
Adding transparent mode policies 27
Configure the policy 27
On a policy in the list to add the new policy above a specific policy 27
Policy 27
Select a policy list tab 27
Select new to add a new policy you can also select insert policy before 27
Arrange policies in the policy list so that they have the results that you expect arranging policies in a policy list is described in configuring policy lists 28
Select ok to add the policy the policy is added to the selected policy list 28
Configuring policy lists 29
Policy matching in detail 29
Addresses 30
Changing the order of policies in a policy list 30
Disabling a policy 30
Enabling a policy 30
Enabling and disabling policies 30
Adding addresses 31
Deleting addresses 31
Organizing addresses into address groups 32
Services 32
Grouping services 33
Predefined services 33
Providing access to custom services 33
Creating one time schedules 34
Schedules 34
Adding a schedule to a policy 35
Creating recurring schedules 35
Virtual ips 35
Adding static nat virtual ips 36
Using port forwarding virtual ips 37
Adding policies with virtual ips 38
Ip pools 39
Configuring ip mac binding for packets going through the firewall 40
Ip mac binding 40
Adding ip mac addresses 41
Configuring ip mac binding for packets going to the firewall 41
Enabling ip mac binding 42
Viewing the dynamic ip mac list 42
Adding user names and configuring authentication 43
Setting authentication time out 43
Users and authentication 43
Deleting user names from the internal database 44
Adding radius servers 45
Configuring radius support 45
Deleting radius servers 45
Adding user groups 46
Configuring user groups 46
Deleting user groups 47
Interoperability with ipsec vpn products 48
Ipsec vpns 48
Configuring autoike key ipsec vpn 49
Configuring a vpn concentrator for hub and spoke vpn 50
Configuring dialup vpn 50
Configuring manual key ipsec vpn 50
Configuring the member vpns 51
Configuring the vpn concentrator 51
Add additional encrypt policies between the member vpns use the following configuration 52
Add one encrypt policy between the member vpn and the vpn concentrator use the following configuration 52
Add two autoike key tunnels with the same settings and add one of the remote gateways to each tunnel see adding an autoike key vpn tunnel 52
Add two outgoing encrypt policies 52
Add two remote gateways with the same settings including the same authentication key but with different remote gateway addresses see adding a remote gateway 52
Configuring ipsec redundancy 52
Ipsec redundancy allows you to create a redundant autoike key ipsec vpn configuration to two remote vpn gateway addresses 52
See adding an autoike key vpn tunnel or add a manual key vpn tunnel see adding a manual key vpn tunnel 52
See adding an encrypt policy 52
To configure ipsec redundancy 52
Add a remote gateway configuration to define the parameters that the dfl 500 npg uses to connect to and establish an autoike key vpn tunnel with a remote vpn gateway or a remote vpn client the remote gateway configuration consists of the ip address of the remote vpn gateway or client as well as the p1 proposal settings required to establish the vpn tunnel to successfully establish a vpn tunnel the remote vpn gateway or client must have the same authentication key and compatible p1 proposal settings you can add one remote gateway and then create multiple autoike key tunnels that include the same remote gateway in their configurations when the dfl 500 npg receives an ipsec vpn connection request it starts a remote gateway that matches the connection request the vpn tunnel that starts depends on the source and destination addresses of the ipsec vpn request which the dfl 500 npg matches with an encrypt policy to add a remote gateway 53
Adding a remote gateway 53
Configure the remote gateway 53
Remote gateway 53
Select new to add a new remote gateway 53
The source and destination of both policies must be the same add a different autoike key tunnel to each policy see adding an encrypt policy 53
About dialup vpn authentication 54
Aggressive mode with a user group selected 54
Aggressive mode with no user group 54
For dialup vpn authentication to work you must create compatible configurations on the dfl 500 npg that is the dialup server and its dialup clients the configurations required for the server and the clients are different for different dialup gateway configurations there are four possible dialup vpn authentication configurations 54
Main mode with a user group selected 54
Main mode with no user group selected 54
Select ok to save the remote gateway 54
A username and password in the user group added to the dialup server remote gateway in this configuration the clients pre shared key must be formatted with a between the user name and password username password 55
Aggressive mode with no user group 55
For each variation the remote gateway field of the dialup server remote gateway configuration must be set to dialup user and all of the clients must have their remote gateway or equivalent set to the static ip address of the remote gateway server the following sections describe how to configure authentication on the server and clients for each of these variations 55
In this configuration the server and the clients use aggressive mode for key exchange a user group has not been selected in the server dialup remote gateway clients authenticate with the server using their authentication keys 55
In this configuration the server and the clients use main mode for key exchange a user group has been selected in the server dialup remote gateway clients authenticate with the server using their authentication keys the client authentication key can be one of the following 55
In this configuration the server and the clients use main mode for key exchange a user group has not been added to the server dialup remote gateway clients authenticate with the server using their authentication keys 55
Main mode with a user group selected 55
Main mode with no user group selected 55
The same as the server authentication key 55
About dh groups 56
About the p1 proposal 56
Aggressive mode with a user group selected 56
Autoike key ipsec vpns use a two phase process for creating a vpn tunnel during the first phase p1 the vpn gateways at each end of the tunnel negotiate to select a common algorithm for encryption and another one for authentication when you configure the remote gateway p1 proposal you are selecting the algorithms that the dfl 500 npg proposes during phase 1 negotiation you can select up to three different encryption and authentication algorithm combinations choosing more combinations might make it easier for p1 negotiation but you can restrict the choice to one if required for negotiation to be successful both ends of the vpn tunnel must have at least one encryption algorithm and one authentication algorithm in common 56
In this configuration the server and the clients use aggressive mode for key exchange a user group is selected in the server dialup remote gateway the format of the authentication key depends on the information in the local id field 56
Select 3des to propose to encrypt packets using triple des encryption 56
Select des to propose to encrypt packets using des encryption 56
Select md5 to propose to use md5 authentication 56
Select sha1 to propose to use sha1 authentication 56
The diffie hellman dh algorithm creates a shared secret key that can be created at both ends of the vpn tunnel without communicating the key across the internet you can select from dh group 1 2 and 5 dh group 5 produces the most secure shared secret key and dh group 1 produces the least secure key however dh group 1 is faster that dh group 5 56
About nat traversal 57
Add an autoike key tunnel to specify the parameters used to create and maintain a vpn tunnel that has been started by a remote gateway configuration to add an autoike key vpn tunnel 57
Adding an autoike key vpn tunnel 57
Autoike key 57
Configure the autoike key vpn tunnel 57
Nat network address translation converts private ip addresses into routable public ip addresses the dfl 500 npg uses napt network address port translation in which both ip addresses and ports are mapped mapping both components allows multiple private ip addresses to use a single public ip address because a nat device modifies the original ip address of an ipsec packet the packet fails an integrity check this failure means that ipsec vpn does not work with nat devices nat traversal solves this problem by encapsulating the ipsec packet within a udp packet encapsulating the ipsec packet allows nat to process the packet without changing the original ipsec packet 57
Select new to add a new autoike key vpn tunnel 57
About replay detection 58
About the p2 proposal 58
About perfect forward secrecy pfs 59
Adding a manual key vpn tunnel 59
Configure a manual key tunnel to create an ipsec vpn tunnel between the dfl 500 npg and a remote ipsec vpn client or gateway that is also using manual key a manual key vpn tunnel consists of a name for the tunnel the ip address of the vpn gateway or client at the opposite end of the tunnel and the encryption algorithm to use for the tunnel depending on the encryption algorithm you must also specify the encryption keys and optionally the authentication keys used by the tunnel because the keys are created when you configure the tunnel no negotiation is required for the vpn tunnel to start however the vpn gateway or client that connects to this tunnel must use the same encryption algorithm and must have the same encryption and authentication keys to create a manual key vpn tunnel 59
Configure the vpn tunnel 59
Manual key 59
Perfect forward secrecy pfs improves the security of a vpn tunnel by making sure that each key created during phase 2 is not related to the keys created during phase 1 or to other keys created during phase 2 pfs might reduce performance because it forces a new diffie hellman key exchange when the phase 2 tunnel starts and whenever the keylife ends and a new key must be generated as a result using pfs might cause minor delays during key generation if you do not enable pfs the vpn tunnel creates all phase 2 keys from a key created during phase 1 this method of creating keys is less processor intensive but also less secure if an unauthorized party gains access to the key created during phase 1 all the phase 2 encryption keys can be compromised 59
Select new to add a new manual key vpn tunnel 59
The dfl 500 npg sends an alert email when replay detection detects a replay packet to receive the alert email you must configure alert email and select enable alert email for critical firewall vpn events or violations for information about alert email see configuring alert email 59
Adding a vpn concentrator 60
Concentrator 60
Enter the name of the new concentrator in the concentrator name field 60
Select new to add a vpn concentrator 60
Select ok to save the manual key vpn tunnel 60
To add tunnels to the vpn concentrator select a vpn tunnel from the available tunnels list and select the right arrow 60
To remove tunnels from the vpn concentrator select the tunnel in the members list and select the left arrow 60
Adding an encrypt policy 61
Viewing vpn tunnel status 63
Testing a vpn 64
Viewing dialup vpn connection status 64
Pptp and l2tp vpns 66
Pptp vpn configuration 66
Configuring the dfl 500 npg as a pptp gateway 67
Add the addresses from the pptp address range to the external interface address list the addresses can be grouped into an external address group 68
Add the addresses to which pptp users can connect to the internal interface the addresses can be grouped into an address group 68
Int policy to allow pptp clients to connect through the dfl 500 npg configure the policy as follows 68
You can also configure traffic shaping logging and web filter settings for pptp policies for information about adding firewall policies see adding nat route mode policies 68
Configuring the dfl 500 npg as an l2tp gateway 69
L2tp vpn configuration 69
Blocking web pages that contain unwanted content 71
Configuring content filtering 71
Enabling web content filtering 71
Web content filtering 71
Backing up and restoring the banned word list 72
Changing the content block message 72
Clearing the banned word list 72
Blocking access to urls 73
Configuring url blocking 73
Changing the url block message 74
Clearing the url block list 74
Downloading the url block list 74
Uploading a url block list 74
Exempting urls from content or url blocking 75
Removing scripts from web pages 75
Adding urls to the exempt url list 76
Clearing the exempt url list 76
Downloading the exempt url list 76
Uploading an exempt url list 77
Configuring logging 78
Logging and reporting 78
Recording logs on a remote computer 78
Recording logs on a webtrends server 78
Configuring alert email 79
Selecting what to log 79
Configuring alert email 80
Enabling alert email 80
Testing alert email 80
Administration 81
System status 81
Upgrading the dfl 500 npg firmware 82
Upgrading the firmware 82
Upgrading the firmware from a tftp server using the cli 82
Upgrading the firmware using the web based manager 82
Backing up system settings 84
Displaying the dfl 500 npg serial number 84
Restoring system settings 84
Restoring system settings to factory defaults 84
Changing to nat route mode 85
Changing to transparent mode 85
Restarting the dfl 500 npg 86
Shutting down the dfl 500 npg 86
System status monitor 86
At the top of the display the system status monitor shows 87
Configuring the external interface 87
Configuring the internal interface 87
Configuring the management interface transparent mode 87
Each line of the system status monitor displays the following information about each active firewall connection 87
Network configuration 87
Network to make any of the following changes to the dfl 500 npg network settings 87
Setting dns server addresses 87
Configuring the external interface 88
Configuring the internal interface 88
Configuring the external interface for dhcp 89
Configuring the external interface with a static ip address 89
Configuring the external interface for pppoe 90
Controlling management access to the external interface 90
Changing the external interface mtu size to improve network performance 91
Adding routing gateways 92
Configuring routing 92
Configuring the management interface transparent mode 92
Setting dns server addresses 92
Adding a default route 93
Adding routes to the routing table 93
Adding routes transparent mode 94
Configuring the routing table 94
Enabling rip server support 94
Configure the dhcp settings 95
Configure the ip network settings of the computers on your network to obtain an ip address automatically using dhcp 95
If the dfl 500 npg is operating in nat route mode you can configure it to be the dhcp server for your internal network 95
Providing dhcp services to your internal network 95
Repeat these steps to add more routes as required 95
Select apply 95
Select enable dhcp 95
System configuration 96
Viewing the dynamic ip list 96
Setting system date and time 97
Adding and editing administrator accounts 98
Adding new administrator accounts 98
Changing web based manager options 98
Configuring snmp 99
Configuring the dfl 500 npg for snmp connections 99
Editing administrator accounts 99
Select apply 100
Glossary 101
Dfl 500 user manual 116 116
Offices 116
Technical support 116
Dfl 500 user manual 117 117
Registration card 117
Limited warranty 119
Register the d link dfl 500 office firewall online at http www dlink com sales reg 122
Registration 122

D-Link DFL-500 [67/122] Configuring the dfl 500 npg as a pptp gateway

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