What is a denial-of-service (DoS) attack?
An attacker can use spam email messages to launch a similar attack on your email account. Whether you have an email account supplied by your employer or one available through a free service such as Yahoo or Hotmail, you are assigned a specific quota, which limits the amount of data you can have in your account at any given time. By sending many, or large, email messages to the account, an attacker can consume your quota, preventing you from receiving legitimate messages.
What is a distributed denial-of-service (DDoS) attack?
How do you avoid being part of the problem?
- Install and maintain anti-virus software).
- Install a firewall, and configure it to restrict traffic coming into and leaving your computer.
- Follow good security practices for distributing your email address. Applying email filters may help you manage unwanted traffic.
How do you know if an attack is happening?
- unusually slow network performance (opening files or accessing websites)
- unavailability of a particular website
- inability to access any website
- dramatic increase in the amount of spam you receive in your account
What do you do if you think you are experiencing an attack?
- If you notice that you cannot access your own files or reach any external websites from your work computer, contact your network administrators. This may indicate that your computer or your organization's network is being attacked.
- If you are having a similar experience on your home computer, consider contacting your internet service provider (ISP). If there is a problem, the ISP might be able to advise you of an appropriate course of action.