The threats to networks

Viruses

Rogue software of many kinds, all of which can be very disruptive.

• Viruses and worms

Scanning

Gathering information as a preliminary to abusing networks including yours.

• Port and address scanning

Attacks

What may happen if someone deliberately targets your network for any reason.

• Deliberate attacks on your network

What users can do

Issues about even well-meaning users.

• Threats from your own users

E-mail

Specific threats associated with e-mail, often arising because it is taken for granted.

• E-mail abuse