Functions
MoRoS ADSL 2.1 PRO
13.3.5
PPTP General
PPTP (Point-to-Point Tunnelling Protocol) is a VPN (virtual private network) that is
not recommended for new installations. A recent alternative is OpenVPN.
PPTP establishes a PPP connection via a tunnel set-up with the GRE protocol. To
establish the tunnel, it is essential that the GRE (Generic Routing Encapsulation)
protocol is routed without restrictions between the two PPTP participants and a
TCP connection with port 1723 is possible. The TCP port 1723 is fix and cannot be
modified. The GRE protocol is not always routed directly in the Internet. In this
case, NAT can prevent to establish a tunnel, if performed.
We strongly recommend to use as long as possible passwords with special
characters and the encryption method MPPE-128 Bit.
13.3.6
Setting Up a PPTP Server
The settings for the MoRoS ADSL 2.1 PRO as PPTP server are configured here. A
maximum of 5 PPTP clients can log on to this server at the same time. However, it
is possible to create more users, but only 5 tunnels can be active at the same time.
Configuration via the web interface
For an operation as PPTP server, check in the menu "LAN (ext)" on the
page "PPTP server" the checkbox "Activate PPTP server".
In order to display the messages of the last connection, select the link
"Display log of last connection".
In order to select the authentication method for the PPTP client at the
server, select this from the drop-down list "Authentication". If the data
traffic is to be encrypted via the PPTP connection using MPPE, the
authentication type MS-CHAP-v2 is mandatory.
In order to select the encryption for the PPTP connection, select this
from the drop-down list "Encryption". The same encryption must also be
configured for the client.
In order to adjust the MTU (maximum permissible number of bytes in a
packet to be transmitted), change the entry in the entry respective field.
In order to adjust the MRU (maximum permissible number of bytes in a
packet to be received), change the entry in the respective field.
The default settings of MTU and MRU are suitable for most
applications and do not need to be modified usually.
Enter the IP address of the local tunnel end into the field "IPv4 tunnel
address local". If no explicit address is specified, the PPTP server will use
the IP address 192.168.0.1. If this address is already reserved, another
address can be specified here.
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