Billion Electric Company CO1 User Manual

Chapter 4: VPN Configuration 

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 This field may be "Remote host address" or "Remote LAN address" 

depending of the address type. It is the remote IP address, or LAN network address of the 
gateway, that opens the VPN tunnel. 

Subnet mask of the remote LAN. Only available when address type is equal to 

the "Subnet address". 

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Select the encryption method from the pull-down menu. There are 

several options, DES, 3DES and AES (128, 192 and 256). 

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  DES: Stands for Data Encryption Standard, it uses 56 bits as an encryption method. 

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  3DES:  Stands for Triple Data Encryption Standard, it uses 168 (56*3) bits as an 

encryption method.  

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  AES:  Stands for Advanced Encryption Standards, you can use 128, 192 or 256 bits as 

encryption method.

 

 

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 ESP

It is a Message Digest algorithm which coverts any length of a message 

into a unique set of bits.  It is widely used MD5 (Message Digest) and SHA (Secure Hash Algorithm) 
algorithms. 

SHA is more resistant to brute-force attacks than MD5, however it is slower. 

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  MD5: A one-way hashing algorithm that produces a 128−bit hash. 

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A one-way hashing algorithm that produces a 160−bit hash.

 

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 IPSec encapsulation mode : tunnel. 

 

It is a public-key cryptography protocol that allows two 

parties to establish a shared secret over an unsecured communication channel (i.e. over the Internet). 
There are three modes, MODP 768-bit, MODP 1024-bit and MODP 1536-bit. MODP stands for Modular 
Exponentiation Groups.

 

 
Open Tunnel:  This button allows users to open the tunnel. This button changes to "Close 
Tunnel" as soon as the tunnel is opened. 

For more advanced settings, click on “P2 Advanced”. 
 
Once the parameters are set, click on “Save & Apply” to save and to take into account the new 
configuration. 
 
 

For Advanced features and parameters, click on “P1 Advanced” button into Phase 1 panel.