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the customer has little to no network documentation. The
reason for the lack of network documentation is varied. In
many cases this is both the fault of the customer and the
vendor / consultant who designed and implemented the
network. The vendor just does not do it and the customer
does not press hard enough for it. In some cases, technology
consultants do not feel it's important enough or want to
lock the customer into having to call "them" if something
goes wrong or a configuration needs to be changed.
consultant, it can have a dramatic affect on the future
growth of the customer, increase the costs of future network
upgrades and diagnostics, and can negatively impact the
security of the customers network.
with regards to computer networks, I first want to give you
examples of what I have "not" seen documented, and what
problems this has caused.
implement a new firewall and to secure many of the internal
systems , I ran into some really incredible issues. None of
the primary server systems were documented. No one knew what
server did what, how much memory, disk space, what type of
processor(s), and in some cases, did not know what Operating
System was installed. And worse than that, during my initial
review, we located three servers in a closet, on a different
floor, that no one even knew existed!
what was suppose to be done to maintain their enterprise
Anti-Virus system. When I finally determined what the admin
password was to login to the Anti-Virus services, I found
that virus signatures had not been updated in over six
months. Then we found that the system was not even
functioning and nearly 90% of systems on the network were
infected with virus and worms (and not the annoying kind
either, the destructive kind)
and again, because of the lack of network documentation,
none of them had been maintained. The customer just kept
changing tapes. And do you know what, none of the backup
jobs had been running for months. Talk about a false sense
of security!
network documentation and procedures can affect network
security. In one case, a customer had a rather expensive
Check Point Firewall in place. No documentation was
available and the customer had been told that nothing needed
to be done to maintain the Firewall. The customer told me
that recently, their Internet access had become very
sluggish. It took two days to locate the Check Point console
password. When I logged in I found that the C: drive had
absolutely no free disk space because the Firewall log had
consumed it all. This could have been avoided if the
Firewall was setup properly in the first place. The Firewall
was also about 4 Service Packs behind, and the rules in
place were quite inadequate. Not to mention that none of the
rules themselves had been documented. And one more thing to
think about. If this network had been attacked and
compromised, how quickly would we have been able to respond
to the attack if so much of the network was undocumented? It
would have been a disaster.
network documentation:
documented, including the physical locations and what
primary, secondary, etc.. purpose they serve. All key
service accounts an login account user-id and password's
should be documented and stored in a safe location, maybe a
company lockbox or vault, or use something like KeyPass to
store them. A visual diagram of the network layout, even
from a high level, should exist no matter how small or large
the network is. Products like WhatsUpGold can assist with
this or you can create a Visio diagram of the network.
Procedures on how to maintain the network technology,
including Operating Systems, security related services,
backup and disaster recovery (business continuity), and
firewall technologies should exist.
document and secure all Operating System and application
licensing. This is something that is very often overlooked
and is imperative if you have to recover from a disaster
situation in which the rebuild of systems is necessary.
Other information to have documented is key contact
information. For instance, who do you call if your Internet
connection goes down? Who do you contact if your offsite web
services are not functioning? Do you have a third party that
maintains your Domain Name Services (DNS)? If you have
custom applications, do you know exactly who you must call
if there is a problem?
within a computer network. There are many more aspects to
network documentation.
office, small office, or large office, should have an
adequate level of network documentation and procedures to
follow in order to maintain the network. If you have
invested in network technology, don't you want to keep your
investment safe, sound, and performing at it's peak?
consultant working on a new network implementation or
upgrading an existing one, demand that they provide you with
complete network documentation. Even if it costs you extra
you should request it. It will save you a lot of time and
money in the future. And, it may actually keep your business
from experiencing long periods of down time.
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