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A Divison of Jorvig Consulting
Inc.
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Network
Security
Considerations
- When you have a
computer directly on an external network (not through a gateway
appliance) it is vulnerable to any attacks from the internet.
- A computer has
many process that are running and, depending on which service you have
enabled, maybe listening for some other computer to contact it.
- Your best
defense in the situation is to have a software firewall and configure
it to only allow ports to be accessed for services that you want to use.
- Common ports
that you need open are 80 &443 for web browsing, 110 & 25 for
email, 53 for DNS service and 123 for time service. Nothing else should
be open.
- If you have a
gateway appliance between your computer(s) and your high speed
connection the security risks are far less.
- If you
appliance has a DMZ option ensure it's disabled or the security of the
gateway will be disabled.
- More questions? Email us.
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