Avaya Configuring and Troubleshooting Bay Dial VPN (DVS) Networks Manuel d'utilisateur Page 61
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Dial VPN Layer 3 Tunneling
303509-A Rev 00 3-13
If the TMS finds a match in its database for both the user and domain names,
it determines that this user is a Dial VPN user and a candidate for tunnel
creation. The TMS then checks that the number of current connections does
not exceed the maximum number of users allowed.
If the TMS determines that the user is not a tunnel candidate, the NAS first
treats the request as a proxy RADIUS request and attempts to authenticate this
user in the usual way. See the description of proxy RADIUS in the BSAC
Administration Guide for your platform.
4.
If the dial-in request is a tunnel candidate, the NAS starts the
authentication process and builds a tunnel.
Once it determines that this request is a tunnel candidate, the TMS tells the
NAS to contact the gateway for remote authentication. For a given domain,
authentication and address allocation can take place locally, using ACP (in an
erpcd-based network), or remotely, using RADIUS and DHCP on the
customer’s network. If the request is not a tunnel candidate, the NAS uses
local (instead of remote) authentication.
The NAS receives the remote node’s address, the source of which depends on
the type of authentication and the type of IP address allocation.
5.
The RADIUS client on the gateway sends a request to the RADIUS server
on the home network to authenticate the remote user.
During remote authentication, the RADIUS authentication server on the home
network verifies that the remote node is authorized to access the home
network and determines which network services the remote node is allowed to
use.
6.
The DHCP server or the RADIUS server on the home network assigns an
IP address and includes that address in the reply to the gateway.
Note:
The system administrator can change the default requirements for the
Dial VPN user name format as needed.
Note:
The TMS may deny a tunnel request for a number of reasons; for
example, if the maximum number of users has been reached, if the TMS does
not find a match for the domain name in its database, or if the authentication
request fails. If the tunnel request is denied, the connection between the NAS
and the remote node is dropped.
- Configuring and 1
- Troubleshooting Bay Dial 1
- VPN Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 303509-A Rev 00 vii 7
- 303509-A Rev 00 ix 9
- 303509-A Rev 00 xi 11
- 303509-A Rev 00 13
- Before You Begin 15
- Text Conventions 15
- Acronyms 17
- How to Get Help 19
- Chapter 1 21
- Tunneling Overview 21
- What Is Tunneling? 22
- Layer 3 Tunneling 24
- Layer 2 Tunneling 24
- 1-6 303509-A Rev 00 26
- Dial VPN Network Components 27
- 1-8 303509-A Rev 00 28
- 1-10 303509-A Rev 00 30
- 1-12 303509-A Rev 00 32
- Where to Go Next 34
- Chapter 2 35
- Dial VPN Layer 2 Tunneling 35
- 2-2 303509-A Rev 00 36
- L2T0003A 36
- 303509-A Rev 00 2-3 37
- L2TP Packet Encapsulation 38
- 2-6 303509-A Rev 00 40
- Security in an L2TP Network 41
- 2-8 303509-A Rev 00 42
- RADIUS User Authentication 43
- RADIUS Accounting 44
- L2TP IP Interface Addresses 44
- Starting an L2TP Session 45
- Examples of L2TP Tunnels 46
- 303509-A Rev 00 2-13 47
- 2-14 303509-A Rev 00 48
- Chapter 3 49
- Dial VPN Layer 3 Tunneling 49
- 3-2 303509-A Rev 00 50
- 303509-A Rev 00 3-3 51
- How Tunnel Management Works 52
- How the TMS Database Works 54
- How DHCP Works 55
- shows the entire process 56
- Assigning Addresses 58
- Starting the Connection 60
- 3-14 303509-A Rev 00 62
- 3-16 303509-A Rev 00 64
- 3-18 303509-A Rev 00 66
- DVS0007A 66
- Chapter 4 69
- 4-2 303509-A Rev 00 70
- <acp_or_RADIUS> 71
- stats -o 72
- <called_number> 73
- Configuring Active RIP 75
- Chapter 5 77
- Configuring TMS and Security 77
- for erpcd Networks 77
- 5-2 303509-A Rev 00 78
- 303509-A Rev 00 5-3 79
- Tunnel Management Commands 80
- All commands except 81
- Command Arguments 82
- 303509-A Rev 00 5-13 89
- 0013ABC0:001234560000 89
- Chapter 6 91
- 6-2 303509-A Rev 00 92
- 303509-A Rev 00 6-3 93
- DVS0015A 93
- Using RADIUS Accounting 94
- RADIUS server 95
- Messages.” 99
- Chapter 7 101
- 7-2 303509-A Rev 00 102
- <slot_number> 103
- Caution: 104
- Gateway Accounting Messages 105
- Chapter 8 107
- 8-2 303509-A Rev 00 108
- DVS0008A 108
- 303509-A Rev 00 8-3 109
- (continued) 110
- 303509-A Rev 00 8-7 113
- 8-8 303509-A Rev 00 114
- 303509-A Rev 00 8-9 115
- Enabling L2TP 119
- (continued) 123
- Framed-IPX-Network 124
- 303509-A Rev 00 8-19 125
- Creating a Superscope 127
- Chapter 9 129
- Managing a Dial VPN Network 129
- 9-2 303509-A Rev 00 130
- Appendix A 131
- Planning Worksheet 131
- A-2 303509-A Rev 00 132
- For Each Destination Site 133
- For Each Remote Node 134
- Appendix B 135
- Syslog Messages 135
- TMS Syslog Messages 138
- Appendix C 145
- Troubleshooting 145
- Preventing Problems 146
- Preparing to Troubleshoot 147
- Troubleshooting Worksheet 148
- 303509-A Rev 00 C-5 149
- Troubleshooting Routers 150
- Cable Guide 150
- C-8 303509-A Rev 00 152
- 303509-A Rev 00 C-11 155
- C-12 303509-A Rev 00 156
- 303509-A Rev 00 C-13 157
- C-14 303509-A Rev 00 158
- Managing 163
- Remote Access Concentrators 163
- Using Command Line Interfaces 163
- Managing Remote 165
- Access Concentrators Using 165
- Command Line Interfaces 165
- C-22 303509-A Rev 00 166
- DVS0005A 167
- C-24 303509-A Rev 00 168
- Troubleshooting the LAC 169
- Troubleshooting the LNS 170
- C-32 303509-A Rev 00 176
- Glossary 177
- Glossary-6 303509-A Rev 00 182
- Tunnel Management 182
- System (TMS) 182
- Virtual Private 182
- Network (VPN) 182
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