150 Handbook of SCADA/Control Systems Security
be recovered immediately in the event of a disaster should be compatible
with off-the-shelf computer components. This compatibility will avoid
delays in ordering custom-built equipment from a vendor.
• Document system congurations and vendor information—Well-
documented system congurations ease recovery. Similarly, vendor names
and emergency contact information for vendors that supply essential hard-
ware, software, and other components should be listed in the contingency
plan so that replacement components may be purchased quickly.
• Coordinate with security policies and system security controls—
Client/server contingency solutions should be coordinated with secu-
rity policies and system secur ...