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Netværkssikkerhed
Network Security

• Introduktion
• Nessus Scan
• Nessus Questions
  • Question 1
  • Question 2
  • Question 3
  • Question4
  • Question 5
  • Question 6
  • Question 7
  • Question 8
  • Question 9
  • Question 10
  • Question 11
  • Question 12
  • Question 13
  • Question 14
  • Question 15
  • Question 16
  • Question 17
  • Question 18
  • Question 19
  • Question 20
  • Question 21
  • Question 22
  • Question 23
  • Question 24
  • Question 25
• Snort Questions
• References

Question 15

How can an ISP secure a customer’s computer against port-scans?

It depends on the type of customer.

If the customer doesn't run any services, the ISP can simply block all attempts to access the customer.

If the customer is running services, the ISP could consider the techniques in question 16. If it's know specifically which ports the customer i using, the rest can be firewalled. This'll of course give some administrative problems when the customer wants to add additional services.

Bjarne D Mathiesen

Michael Pantridge

Thabet Al-Assdi

Chang Jensen