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Do I need virus and firewall protection?

sasllc
sasllc asked
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Last Modified: 2013-12-04
Customer has a 5-station XP peer network, with a DSL router attached to the hub as well.  Only two of the stations ever access the internet.  They don't want to spend unecessary money, so here are the questions:

1) Do they really NEED norton antivirus on EACH computer, or can they get by with it on just those two that ever access the internet?

2) Same thing with norton firewall--do the NEED it on EACH computer?

I know it would be BEST to have it on all, but is it actually a risk by not having it on the stations that never open IE and never go on the internet in any way, and never get e-mail, etc?  They are just basic workstations that happen to have access to the internet only because all the stations and the router are on the same hub, but they never access the internet.

If it's NOT OK to just protect the two that access the internet, please help me understand WHY so I can explain to them why they need to protect them all...thanks

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Technical Architect
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Rich RumbleSecurity Samurai
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Commented:
Very helpful, but I'm not clear on how to use just one instance of firewall 'on the perimeter', because in this case, they have 5 XP computers hooked together peer-to-peer through a hub, and the DSL router is hooked to the hub as well.  So, if I were to put one copy of ZA (or other firewall) on the network, WHERE would it need to go?  Which computer?
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Use this free online Trend Housecall scanner to find and clean every known virus/rootkits/backdoors:
http://housecall.trendmicro.com/housecall/start_corp.asp

Some viruses can't be removed by housecall. If so, use the free Trend Micro system cleaner:
http://www.trendmicro.com/download/tsc.asp

If you get's an ActiveX error, when loading the HouseCall web page:
http://kb.trendmicro.com/solutions/solutionDetail.asp?solutionId=4317

If you want to secure your one workstation in the future, consider to purchase PC-cillin with builtin firewall:
http://www.trendmicro.com/en/products/desktop/pc-cillin/evaluate/overview.htm
Getting a personal Firewall
http://www.zensecurity.co.uk/default.asp?URL=personal

Download the free version of Sygate personal firewall
http://smb.sygate.com/support/documents/spf/default.htm
http://smb.sygate.com/download/download.php?pid=spf

Download the free version of ZoneAlarm firewall
http://www.zonelabs.com/store/content/company/zap_za_grid.jsp?lid=ho_za

Comparative reviews of personal firewall software:
http://www.firewallguide.com/software.htm 

Firewall Product Selector - Choose yourself which one to compare
http://www.spirit.com/cgi-new/report.pl?dbase=fw&function=view
Rich RumbleSecurity Samurai
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Commented:
No no no no stop the spam...
Rich RumbleSecurity Samurai
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Commented:
too late... more to follow... gahhh
Spybot:
http://security.kolla.de/index.php

Ad-aware Standard Edition is THE award winning, free*, multicomponent adware detection and removal utility:
http://www.lavasoft.de/software/adaware/

SpyFerret detects & removes spyware
http://www.onlinepcfix.com/spyware/spyware.htm

Bazooka Adware and Spyware Scanner v1.13.01
http://www.kephyr.com/spywarescanner/

Automatic check of your browser for parasites, adware and spyware
http://www.doxdesk.com/parasite/
Sygate free scanning your security: quick, stealth, trojan, tcp, udp, icmp
http://scan.sygatetech.com/

One Usage of the HACKYOURSELF scan: TCP Scan (65534 ports),UDP scan (800+ ports), and Netbios Scan
http://www.hackerwhacker.com/ 

Shields UP! quickly checks the SECURITY of YOUR computer's connection to the Internet.
https://grc.com/x/ne.dll?bh0bkyd2

Port scan.. Get an instant security analysis now. You dont even need to know your own IP address!
http://www.dslreports.com/scan
Rich RumbleSecurity Samurai
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Commented:
every time...
>"So, if I were to put one copy of ZA (or other firewall) on the network, WHERE would it need to go?  Which computer?"

On each computer!
About Windows Update (SUS)
http://v4.windowsupdate.microsoft.com/en/about.asp

Download and install Microsofts automatic update server (also known as SUS)
http://www.microsoft.com/windows2000/downloads/recommended/susclient/default.asp
Rich RumbleSecurity Samurai
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Commented:
You'd need one computer to be your gateway. It would need 2 NIC's  so your network would look like:

                                                       Firewall-PC
Internet (the router that is)-->  nic1            nic2 -->hub --> other pc's

http://support.microsoft.com/default.aspx?scid=kb;EN-US;234815
The FW-PC would use ICS (windows internet connection sharing)  Nic1 would be connected to the router (dsl/cable router)  and nic2 would connect to the hub, along with the other pcs
But if you don't what to rework your network, ZA on each pc would be grand. ZA is chatty at first... then you'll get fewer and fewer pop-ups asking to allow this and that... read the documentation fully.
-rich
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Pete LongTechnical Architect
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Commented:
ThanQ
:o) Glad we could help you - thank you for the points

BTW: Have a look on http://www.tryware.dk/English/Knowledgebase/HowToProtectYourComputer.html
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