public RadiusPacket Authenticate(string username, string password)
{
RadiusPacket packet = new RadiusPacket(RadiusCode.ACCESS_REQUEST);
packet.SetAuthenticator(_SharedSecret);
byte[] encryptedPass = Utils.EncodePapPassword(Encoding.ASCII.GetBytes(password), packet.Authenticator, _SharedSecret);
packet.SetAttribute(new RadiusAttribute(RadiusAttributeType.USER_NAME, Encoding.ASCII.GetBytes(username)));
packet.SetAttribute(new RadiusAttribute(RadiusAttributeType.USER_PASSWORD, encryptedPass));
return(packet);
}