Set the IP address of the PPTP client.   
You can enter the IP which assigned by PPTP server. Null means 
PPTP client will obtain an IP address automatically from PPTP 
server’s IP pool. 
Enter the remote peer’s private IP address or remote subnet’s 
gateways address. 
Address/Contr
ol Compression 
Used for PPP initialization. In general, you need to enable it as 
default. 
Protocol Field 
Compression 
Used for PPP initialization. In general, you need to enable it as 
default. 
One of the PPTP initialization strings. In general, you don’t need 
to modify this value. 
Maximum Receiving Unit. It is the identifier of the maximum size 
of packet, which is possible to receive in a given environment. 
Maximum Transmission Unit. It is the identifier of the maximum size 
of packet, which is possible to transfer in a given environment. 
Specify the interval between PPTP client and server. 
To check the connectivity of a tunnel, the client and server 
regularly send PPP Echo to each other. If the client or server 
receives no response from the peer within a specified period of 
time, it retransmits the PPP echo. If it receives no response from 
the peer after transmitting the PPP echo for max retries times, it 
considers that the PPTP tunnel is down and tries tore-establish a 
tunnel with the peer. 
Link Detection 
Max Retries 
Specify the max retries times for PPTP link detection. 
You can enter some other PPP initialization strings in this field. 
Each string can be separated by a space. 
Click “Add” to add a PPTP client. You can add at most 3 PPTP 
clients. 
Click “ ” to delete a PPTP client.