Security Benefits of Firewall Protection

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Security Benefits of Firewall Protection
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The primary approach of using a Firewall is to
deal with numerous point regarding security of
your Server or Host.
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• A Firewall imposes restrictions on incoming and
  outgoing packets to and from the private network.

• All the traffic, whether incoming or outgoing,
  must pass through the firewall, and only
  authorized traffic is allowed to pass through it. 

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Some of the segments that covers under these
benefits are
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1. Overall Controlled Access to Site Systems
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• A Firewall act as a barrier to control access
  over to a site system.
• This can be explained by the example that if some
  host can be made reachable from outside networks,
  whereas others can be effectively sealed off from
  unwanted access.

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• A site could prevent outside access to its hosts
  except for special cases such as mail servers or
  information servers.
• Thus providing a filtering system which enables
  only those that meet the access policy.

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2. Concentrated Security
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• A Firewall remains the better choice for
  organizations willing to cut costs on their
  security mechanism.
• Simply put, it becomes easier to set unique
  security credentials on the Firewall itself, and
  it works on all systems accessing the network.

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• Firewall is also a better option because it
  requires less installation and maintenance costs,
  unlike other solutions.
• Despite of the fact that Kerberos and other
  security mechanisms have their added benefits
  over Firewall, the letter one remains more
  popular due to its simplicity, specialization and
  less costs.

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3. Enhance System Privacy
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• Privacy is one of the crucial factors that must
  be taken care as innocuous information might
  contain clue that termed to be very helpful to
  hackers or attackers.
• Since to overcome these factors and grab a much
  effective security value, a Firewall comes in
  action.

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• They help in blocking services that can be helped
  in leaking this information such as finger and
  Domain Name Service.
• These Firewalls can also be used to block DNS
  information about site systems, thus the names
  and IP addresses of site systems would not be
  available to Internet hosts.

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4. Shield from Network Misuse, Policy Enforcement
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• A Firewall can be very beneficial if it was used
  as a filter towards all of the internet access to
  and from the system passes through it.
• The firewall can log accesses and provide
  valuable statistics about network usage.

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• It is very beneficial to collect network usage
  statistics and evidence of probing for a number
  of reasons.
• One of the primary importance is knowing whether
  the firewall is withstanding probes and attacks,
  and determining whether the controls on the
  firewall are adequate thus helping in maintaining
  risk factors.

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5. Defending Vulnerable Services
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• A Firewall can enhance network security and
  reduce risks to hosts by filtering inherently
  insecure services.
• As a result, the subnet gets shield from all of
  the risks, as only selected protocols will be
  able to pass through the Firewall.

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• A Firewall could block any vulnerable services
  such as NFS from entering or leaving a subnet.
• A Firewall could reject all source-routed packets
  and ICMP redirects and then inform administrators
  of the incidents.

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CONCLUSION
A Linux Firewall acts as a shield for your system
through five different stages, from the time it's
installed on your computer to the appearance of
the ransom warning on your screen.