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Page 231 / 308 Scroll up to view Page 226 - 230
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VPN Account
PPTP and L2TP server share the same account database set in VPN Account page.
Name
: A user-defined name for the connection.
Tunnel
: Select
Enable
to activate the account. PPTP(L2TP) server is waiting for the client to
connect to this account.
Username
: Please input the username for this account.
Password
: Please input the password for this account.
Connection Type
: Select Remote Access for single user, Select LAN to LAN for remote gateway.
Peer Network IP
: Please input the subnet IP for remote network.
Peer Netmask
: Please input the Netmask for remote network.
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227
Exceptional Rule Group
Exceptional Rule is dedicated to giving or blocking PPTP/L2TP server access to some specific IP or
IPs(range). Users are allowed to set 8 different exceptional rule groups at most. In each group, user
can add specific IP or IP range.
Press
Edit
to set the exceptional IP (IP Range).
Default Action
: Please first set the range to make
“Default Action”
setting available
.
Set
“Allow” to
ban the listed IP or IPs to access the PPTP and L2TP server.
Check “Block” to grant access to the listed IP or IPs to the PPTP and L2TP server.
Apply:
Press
Apply
button to apply the change.
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228
Exceptional Rule Range
IP Address Range:
Specify the IP address range; IPv4 address range can be supported.
Click
Add
to add the IP Range.
For instance, if user wants to block IP range of 172.16.1.102-172.16.1.106 from accessing your
PPTP and L2TP server, you can add this IP range and valid it.
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229
PPTP
The
Point-to-Point Tunneling Protocol
(PPTP) is a Layer2 tunneling protocol for implementing
virtual private networks through IP network. PPTP uses an enhanced GRE (Generic Routing
Encapsulation) mechanism to provide a flow- and congestion-controlled encapsulated datagram
service for carrying PPP packets.
In the Microsoft implementation, the tunneled PPP traffic can be authenticated with PAP, CHAP,
Microsoft CHAP V1/V2 or EAP-TLS. The PPP payload is encrypted using Microsoft Point-to-Point
Encryption (MPPE) when using MSCHAPv1/v2 or EAP-TLS.
Note:
4 sessions for Client and 4 sessions for Server respectively.
PPTP Server
In PPTP session, users can set the basaic parameters(authentication, encyption, peer address, etc)
for PPTP Server, and accounts in the next page of PPTP Account. They both constitutes the PPTP
Server setting.
PPTP Funtion:
Select
Enable
to activate PPTP Server.
Disable
to deactivate PPTP Server function.
WAN Interface:
Select the exact WAN interface configured for the tunnel. Select Default
to use the
now-working WAN interface for the tunnel.
Auth. Type:
The authentication type, Pap or Chap, PaP, Chap and MS-CHAPv2. When using PAP,
the password is sent unencrypted, whilst CHAP encrypts the password
before sending, and also
allows for challenges at different periods to ensure that an intruder has
not replaced the client. When
passed the authentication with MS-CHAPv2, the MPPE encryption is supported.
Encryption Key Length:
The data can be encrypted by MPPE algorithm with 40 bits or 128 bits.
Default is Auto, it is negotiated when establishing a connection. 128 bit keys provide stronger
encryption than 40 bit keys.
Peer Encryption Mode:
You may select “Only Stateless” or “Allow Stateless and Stateful” mode.
The key will be changed every packet when you select Stateless mode.
IP Addresses Assigned to Peer:
192.168.1.x: please input the IP assigned range from 1~ 254.
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230
Idle Timeout
: Specify the time for remote peer to be disconnected without any activities, from 0~120
minutes.
Exceptional Rule Group:
Select to grant or block access to a group of IPs to the PPTP server. See
Exceptional Rule Group
. If there is not any restriction, select none.
Click
Apply
to submit your PPTP Server basic settings.
PPTP Client
PPTP client can help you dial-in the PPTP server to establish PPTP tunnel over Internet.
Name:
user-defined name for identification.
WAN Interface:
Select the exact WAN interface configured for the tunnel. Select Default to use the
now-working WAN interface for the tunnel.
Username:
Enter the username provided by your VPN Server.
Password:
Enter the password provided by your VPN Server.
Auth. Type:
Default is Auto if you want the router to determine the authentication type to use, or
else manually specify CHAP (Challenge Handshake Authentication Protocol) or PAP (Password
Authentication Protocol) if you know which type the server is using (when acting as a client), or else
the authentication type you want clients connecting to you to use (when acting as a server). When
using PAP, the password is sent unencrypted, whilst CHAP encrypts the password before sending,
and also allows for challenges at different periods to ensure that an intruder has not replaced the
client.
PPTP Server Address:
Enter the IP address of the PPTP server.
Connection Type
: Select Remote Access for single user, Select LAN to LAN for remote gateway.
Time to Connect:
Select Always to keep the connection always on, or Manual to connect manually
any time.
Peer Network IP
: Please input the subnet IP for Server peer.
Peer Netmask
: Please input the Netmask for server peer.
Click
Add
button to save your changes.

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