Hash Algorithm: Hash algorithm provides a method of quick access to data, including SHA1,
SHA256,SHA512,MD5 
Advanced Options 
 
Use LZO Compression: enable or disable use LZO compression for data transfer 
Redirect default Gateway: enable or disable redirect default gateway 
Allow Client to Client: enable or disable allow client to client 
Allow duplicate cn: enable or disable allow duplicate cn 
TUN MTU Setting: set the value of TUN MTU 
TCP MSS: MSS of TCP data 
TLS Cipher: TLS (Transport Layer Security) encryption standard supports AES-128 SHA and AES-
256 SHA 
Client connect script: define some client script by user self 
 
CA Cert: CA certificate 
 
Public Server Cert: server certificate 
 
Private Server Key: the key set by the server 
DH PEM: PEM of the server