Configure the advanced PPTP settings
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                                                Go to Remote Access > PPTP > Advanced.   
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                                                Set the encryption strength. The available options are Weak (40 bits) and Strong (128 bits). Security note: You should always set encryption to Strong (128-bits), except when your network includes endpoints that can’t support this. Both sides of the connection must use the same encryption strength. 
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                                                Click Apply to save your settings. 
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                                                Optionally, enable debug mode. If you select Enable debug mode, the PPTP daemon log file contains extended information about PPTP connection negotiation. 
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                                                Click Apply to save your settings. 
You can define name servers (DNS and WINS) and the name service domain that must be assigned to hosts during the connection establishment.
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                                                Go to Remote Access > Advanced. Define name servers (DNS and WINS) and the name service domains.   
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                                                Click Apply. 
