s! name= encryption= none | opt | req | max pap= enabled | disabled chap= enabled | disabled mschapv2= enabled | disabled ...

%1!s! [name=]            
             [[encryption=] none | opt | req | max]                         
             [[pap=] enabled | disabled]                                    
             [[chap=] enabled | disabled]                                  
             [[mschapv2=] enabled | disabled]                               
             [[psk=] enabled | disabled]                                   
             [[secret=] ]                               
                                                                          
   Sets the security options of a demand dial interface                   
                                                                          
   name       - Name of the interface                                     
   encryption - Data encryption                                           
   pap        - PAP authentication. Enable only with encryption = none    
   chap       - CHAP authentication. Enable only with encryption = none   
   mschapv2   - MS-CHAP v2 authentication.                                
   psk        - Custom Pre-shared key IPsec policy for L2TP connection    
   secret     - The pre-shared key if psk = enabled