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PPTP VPN Client

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Chapter 8 Security Table 53 PPTP Server (continued) LABEL DESCRIPTION Auth Protocol Select the Authentication Protocol allowed for the connection. Options are: MPPE Encryption • PAP - Password Authentication Protocol (PAP) authentication occurs in clear text and does not use encryption. It's probably not a good idea to rely on this for security. • CHAP - Challenge Handshake Authentication Protocol (CHAP) provides authentication through a shared secret key and uses a three way handshake. • MSCHAPv1 - Microsoft CHAP v1 (MSCHAPv1) provides authentication through a shared secret key and uses a three way handshake. It provides improved usability with Microsoft products. • MSCHAPv2 - Microsoft CHAP v2 (MSCHAPv2) provides encryption through a shared secret key and uses a three way handshake. It provides additional security over MSCHAPv1, including two-way authentication. If MSCHAPv1 or MSCHAPv2 is selected as an Auth Protocol, use the dropdown list box to select the type of Microsoft Point-to-Point Encryption (MPPE). Options are: Local IP Address Remote Start IP Idle Timeout DNS Server 1 DNS Server 2 User Access List User Name Server Password IP Address • MPPE 40 bits - MPPE with 40 bit session key length • MPPE 128 bits - MPPE with 128 bit session key length • Auto - Automatically select either MPPE 40 bits or MPPE 128 bits Enter the local endpoint for the PPTP connection. Enter the local IP address range the WiMAX Device assigns to remote users if the remote client device is set to obtain an IP address automatically. Enter the time in minutes to timeout PPTP connections. Specify the IP addresses of DNS servers to assign to the remote users. Enter the user name for the remote user. Select the server that the remote user has access to: PPTPD, L2TPD or Both. Enter the password for the remote user. Enter the local IP address the WiMAX Device assigns to the remote user. Delete Add OK Connection List User Name Remote IP Address PPTP IP Address Login Time Link Time(s) Entering 0.0.0.0 indicates the local IP address will be dynamically assigned. Select an entry and click this to delete it. Click this to create a new entry. Click this to save the changes. This displays the user name for the remote user. This displays the remote endpoint IP address of the remote user. This displays the local IP address of the PPTP server. This displays the time the PPTP connection started. This displays the duration of the PPTP connection. 8.6 PPTP VPN Client Use this screen to view settings for Point to Point Tunneling Protocol (PPTP) clients. 130 WiMAX Device Configuration User's Guide

Section	Page
WiMAX CPE Series	1
About This User's Guide	3
Document Conventions	4
Safety Warnings	6
Contents Overview	7
Table of Contents	9
User’s Guide	15
Introduction to the Series	17
1.1 About Your WiMAX Device	17
1.1.1 WiMAX Internet Access	18
1.1.2 Models with Phone Ports	18
1.1.3 Models with WiFi	19
1.2 Good Habits for Managing the WiMAX Device	19
Introduction to the Web Configurator	20
2.1 Overview	20
2.1.1 Accessing the Web Configurator	20
2.1.2 Saving and Canceling Changes	21
2.1.3 Working with Tables	21
2.2 The Main Screen	22
Setup Wizard	25
3.1 Overview	25
3.1.1 Welcome to the Setup Wizard	25
3.1.2 LAN Settings	26
3.1.3 WiMAX Frequency Settings	27
3.1.4 WiMAX Authentication Settings	28
3.1.5 VoIP Settings	30
3.1.6 WLAN Settings	32
3.1.7 Setup Complete	34
Tutorials	35
4.1 Overview	35
4.2 WiMAX Connection Settings	35
4.3 Setting Up a Small Network for the LAN	36
4.4 Making a Telephone Call Over the Internet	38
4.4.1 Configure Your SIP Account	38
4.5 Blocking Web Access from the WiMAX Device	40
4.6 Restricting Wireless Access to the WiMAX Device	40
4.7 Allowing Internet Users to use Internal Servers	42
4.8 Access the WiMAX Device with a Domain Name	44
4.8.1 Registering a DDNS Account on www.dyndns.org	45
4.8.2 Configuring DDNS on Your WiMAX Device	46
4.8.3 Testing the DDNS Setting	46
4.9 Configuring Static Route for Routing to Another Network	46
4.10 Remotely Managing Your WiMAX Device	48
4.11 Changing Certificate to Communicate with Other Networks	49
4.12 Using Virtual Networks	50
4.12.1 Scenario 1	51
4.12.2 Scenario 2	52
4.12.3 Scenario 3	54
4.12.4 Scenario 4	56
4.12.5 Scenario 5	58
Technical Reference	61
System Status	63
5.1 Overview	63
5.2 System Status	63
WiMAX	67
6.1 Overview	67
6.1.1 What You Need to Know	67
6.2 Connection Settings	70
6.3 Frequency Settings	72
6.4 Authentication Settings	74
6.5 Channel Plan Settings	77
6.6 CAPL Settings	79
6.6.1 CAPL Settings: Add	80
6.7 RAPL Settings	81
6.8 Home NSP Settings	82
6.9 Connect	83
6.10 Wide Scan	85
6.11 Link Status	87
6.12 Link Statistics	88
6.13 Connection Info	89
6.14 Service Flow	89
Network Setting	91
7.1 Overview	91
7.1.1 What You Need to Know	91
7.2 WAN	94
7.3 PPPoE	96
7.4 GRE	97
7.5 EtherIP	98
7.6 IP	98
7.7 DHCP	99
7.8 WLAN	100
7.9 WPS	102
7.10 MAC Address Filter	103
7.11 Static Route	104
7.12 Static Route Add	104
7.13 RIP	105
7.14 Port Forwarding	107
7.14.1 Port Forwarding Wizard	108
7.15 Port Trigger	108
7.15.1 Port Trigger Wizard	110
7.15.2 Trigger Port Forwarding Example	111
7.16 DMZ	111
7.17 ALG	112
7.18 QoS	113
7.19 UPnP	113
7.19.1 Installing UPnP in Windows XP	114
7.19.2 Web Configurator Easy Access	118
7.20 VLAN	119
7.21 DDNS	121
7.22 IGMP Proxy	123
7.23 Content Filter	123
Security	125
8.1 Overview	125
8.1.1 What You Need to Know	125
8.2 IP Filter	125
8.3 MAC Filter	126
8.4 DDOS	127
8.5 PPTP VPN Server	129
8.6 PPTP VPN Client	130
8.7 PPTP VPN Client: Add	131
8.8 L2TP VPN Server	133
8.9 L2TP VPN Client	135
8.10 L2TP VPN Client: Add	135
8.11 IPSec VPN	137
8.11.1 IPSec VPN: Add	139
8.12 Technical Reference	144
8.12.1 IPSec Architecture	144
8.12.2 Encapsulation	145
8.12.3 IKE Phases	146
8.12.4 Negotiation Mode	147
8.12.5 IPSec and NAT	147
8.12.6 VPN, NAT, and NAT Traversal	148
8.12.7 ID Type and Content	148
8.12.8 Pre-Shared Key	150
8.12.9 Diffie-Hellman (DH) Key Groups	150
The VoIP General Screens	151
9.1 VoIP Overview	151
9.1.1 What You Need to Know	151
9.1.2 Before you Begin	152
9.2 Media	153
9.3 QoS	154
9.4 SIP Settings	155
9.5 Speed Dial	155
9.6 Technical Reference	156
9.6.1 DSCP and Per-Hop Behavior	156
The VoIP Account Screens	157
10.1 Overview	157
10.1.1 What You Need to Know	157
10.2 Status	160
10.3 Server	161
10.4 SIP	163
10.5 Feature	165
10.6 Dialing	166
10.7 FAX	167
10.8 Technical Reference	167
10.8.1 SIP Call Progression with Session Timer	167
10.8.2 SIP Client Server	170
The VoIP Line Screens	171
11.1 Overview	171
11.1.1 What You Need to Know	171
11.2 Phone	172
11.3 Voice	172
11.4 Region	173
Maintenance	175
12.1 Overview	175
12.1.1 What You Need to Know	175
12.2 Password	180
12.3 HTTP	181
12.4 Telnet	181
12.5 SSH	182
12.6 SNMP	183
12.7 CWMP	183
12.8 OMA-DM	185
12.9 Date/Time	187
12.10 Time Zone	187
12.11 Upgrade File	188
12.11.1 The Firmware Upload Process	189
12.12 Upgrade Link	189
12.13 CWMP Upgrade	189
12.14 Backup/Restore	190
12.15 Restore	190
12.15.1 The Restore Configuration Process	191
12.16 Factory Defaults	191
12.17 Log Setting	192
12.18 Log Display	192
12.19 Network Test	193
12.20 Traceroute	194
12.21 About	194
12.22 Reboot	195
Troubleshooting	197
13.1 Power, Hardware Connections, and LEDs	197
13.2 WiMAX Device Access and Login	198
13.3 Internet Access	199
13.4 Wireless Internet Access (for Models with WiFi)	201
13.5 Phone Calls and VoIP (for Models with Phone Ports)	201
13.6 Reset the WiMAX Device to Its Factory Defaults	202
13.6.1 Pop-up Windows, JavaScript and Java Permissions	202
Product Specifications	203
WiMAX Security	207
Importing Certificates	211
Common Services	237
Open Software Announcements	241
Legal Information	277

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Chapter 8 Security

WiMAX Device Configuration User’s Guide

130

8.6

PPTP VPN Client

Use this screen to view settings for Point to Point Tunneling Protocol (PPTP) clients.

Auth Protocol

Select the Authentication Protocol allowed for the connection. Options are:

•

PAP

- Password Authentication Protocol (PAP) authentication occurs in clear

text and does not use encryption. It’s probably not a good idea to rely on this

for security.

•

CHAP

- Challenge Handshake Authentication Protocol (CHAP) provides

authentication through a shared secret key and uses a three way handshake.

•

MSCHAPv1

- Microsoft CHAP v1 (MSCHAPv1) provides authentication

through a shared secret key and uses a three way handshake. It provides

improved usability with Microsoft products.

•

MSCHAPv2

- Microsoft CHAP v2 (MSCHAPv2) provides encryption through a

shared secret key and uses a three way handshake. It provides additional

security over

MSCHAPv1

, including two-way authentication.

MPPE

Encryption

MSCHAPv1

MSCHAPv2

is selected as an

Auth Protocol

, use the drop-

down list box to select the type of Microsoft Point-to-Point Encryption (MPPE).

Options are:

•

MPPE 40 bits

MPPE with 40 bit session key length

•

MPPE 128 bits

MPPE with 128 bit session key length

•

Auto - Automatically select either MPPE 40 bits or MPPE 128 bits

Local IP

Address

Enter the local endpoint for the PPTP connection.

Remote Start

Enter the local IP address range the WiMAX Device assigns to remote users if the

remote client device is set to obtain an IP address automatically.

Idle Timeout

Enter the time in minutes to timeout PPTP connections.

DNS Server 1

DNS Server 2

Specify the IP addresses of DNS servers to assign to the remote users.

User Access List

User Name

Enter the user name for the remote user.

Server

Select the server that the remote user has access to:

PPTPD

L2TPD

Both

Password

Enter the password for the remote user.

IP Address

Enter the local IP address the WiMAX Device assigns to the remote user.

Entering 0.0.0.0 indicates the local IP address will be dynamically assigned.

Delete

Select an entry and click this to delete it.

Add

Click this to create a new entry.

Click this to save the changes.

Connection List

User Name

This displays the user name for the remote user.

Remote IP

Address

This displays the remote endpoint IP address of the remote user.

PPTP IP

Address

This displays the local IP address of the PPTP server.

This displays the time the PPTP connection started.

Link Time(s)

This displays the duration of the PPTP connection.

Table 53

PPTP Server (continued)

LABEL

DESCRIPTION