FireWall


Features and Benefits:

  • One of the most visible benefits of firewalls is the ability to control your system's.
  • Entry points and stop virus attacks.
  • The cost of damage from a virus attack on your systems could be immeasurably high, depending on the type of virus.
  • Prevents Hacking, Stops Virus Attacks, Updated Threat Protection, Consistent Network Speed.
  • Proactively addressing the security concerns of your business and your network now can pay dividends of time savings.

Firewall in Computer Network

A firewall is a network security device, either hardware or software-based, which monitors all incoming and outgoing traffic and based on a defined set of security rules it accepts, rejects or drops that specific traffic.

  • Accept : allow the traffic
  • Reject : block the traffic but reply with an “unreachable error”
  • Drop : block the traffic with no reply

How Firewall Works

  • Firewall match the network traffic against the rule set defined in its table safe or not
  • Once the rule is matched, associate action is applied to the network traffic
  • Most of the traffic which reaches firewall uses one of these three major Transport Layer protocols- TCP, UDP or ICMP
  • All these types have a source address and destination address
  • A firewall establishes a barrier between secured internal networks and outside untrusted network, such as the Internet