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Billion BiGuard VPN Client 
 
Chapter 1: Introduction    
 
 
 
1
Chapter 1: Introduction  
Introduction to BiGuard VPN Client 
Your network is constantly evolving as you integrate more business applications and 
consolidate servers. In that environment, it is becoming extremely complex to maintain total 
security at the edge while users being employees or Teleworkers on the go are working with 
customers and partners. You need to get access to those applications and servers quickly, 
easily and securely. 
BiGuard VPN client is an IPSec VPN software for Windows versions that allows establishing 
secure connections over the Internet usually between a remote worker and the Corporate 
Intranet. IPSec is the most secure way to connect to the enterprise as it provide strong user 
authentication, strong tunnel encryption with ability to cope with existing network and firewall 
settings. 
 
Features 
     Windows supported versions 
Win95, Win98, Me, NT, Win2000, WinXP 
 Tunneling 
Protocol
 
Full IKE support: The IKE implementation is based on the OpenBSD 3.1 implementation 
(ISAKMPD), thus providing best compatibility with existing IPSec routers and gateways. 
Full IPSec support: Main mode and Aggressive mode 
MD5 and SHA hash algorithms 
   NAT Traversal
 
NAT Traversal Draft 1 (enhanced), Draft 2 and 3 (full implementation) 
Including NAT_OA support (floating port for IKE exchange) 
Including NAT keepalive
 
   Encryption 
 
Provides DES, 3DES and AES 128/192/256 bits encryption. 
 
User Authentication (Please see Appendix A)
 
X-Auth support 
Preshared keying support 
Support of Group 1, 2 and 5 (i.e. DH768, 1024 and 1536) 
Flexible Certificate support (PEM, PKCS12, ...) 
     USB Stick
 
VPN configurations and security elements (certificates, Preshared key, ...) can be saved 
into an USB Stick in order to remove authentication information from the computer. 
      Log console
 
All phase messages are logged for testing or staging purpose, and multiple files (10) 
allows to easily narrow the view on specific aspects.