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Network Security Attack

in blog, Networking Notes on July 2, 2014

Three classes of attack are commonly found in today’s network environment:

  • Access attacks
  • Reconnaissance attacks
  • Denial of service (DoS) attacks

Access Attacks

An access attack is just what it sounds like: an attempt to access another user account or net-work device through improper means. The four main types of access attacks are

  • Password attacks
  • Trust exploitation
  • Port redirection
  • Man-in-the-middle

Reconnaissance Attacks

The four main subcategories or methods for gathering network data for a reconnaissance attack are

  • Packet sniffers
  • Port scans
  • Ping sweeps
  • Information queries

Denial of Service (DoS) Attacks

DoS attacks are often implemented by a hacker as a means of denying a service that is normally available to a user or organization. The three main types of DoS attacks are

  • Distributed DoS
  • Smurf

network security attack

Mitigating Network Threats

The following actions can be taken to lessen the impact of an attack on a network:

  • Authentication, Authorization, and Accounting (AAA)
  • Cisco access control lists (ACLs)
  • Cisco IOS Secure Management features: SSH, SNMP, Syslog, and NTP
  • Encryption protocols: SSH, IPsec, and SSL
  • Security appliances and applications: Firewall, IPS, and IDS

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