written 8.3 years ago by
teamques10
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modified 5.3 years ago
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- Network security safeguards are means which network security threats can be reduced, avoided or prevented
- Depending on level of security required there are many techniques used for network security
- As using Internet access and computer systems to manage business continues to rise, security vendors continue to come out with new products to assist in safeguarding networks.
1) Secure Network Equipment
- The first safeguards back to the earliest buildings where locks were used to protect possessions
- Your network equipment needs to be secured behind a door access limited to authorised personnel
- Following provides a facility access checklist
- Do network cables or power lines run through exposed vulnerable areas?
- Who has physical and logical access to computers?
- Who has access to your administrative passwords and how often they are changed?
2) Passwords Procedures
3) Antivirus Software’s
- A virus is hacker program. It can attack operating system directly
- A virus can be just an annoyance such as those that modify display or replicate email to your entire distribution list or reformat hard disk drive or modify data
- More and more viruses are being transmitted through defects in email programs
- Many take advantages of scripting languages built into systems such as Microsoft outlook
- A Trojan Horse is a hacker program that searches out other programs and infects them by embedding a copy of itself in them so that they become “Trojan Horses’
- Precautionary steps should be taken to prevent problems but antivirus software is a minimum requirement
4) Implement a firewall
- Firewall is simply some type of mechanism for protecting your network from outside world
- Firewall needs constant updates and attention
- Functions of firewall are broken into following areas
- Packet Filtering
- Application Proxies
- Stateful Inspection or dynamic packet Filtering
5) Implement a Virtual Private Network
- A VPN is implemented to secure remote access or communication between facilities over Internet
- A VPN is a private connection between two or more network elements over a shared infrastructure
- A virtual in VPN defines a logical definition between network not a separate physical network
- The private in VPN defines separate address and routing
- A VPN is used to describe service provide services of frame relay and ATM and also encrypted tunnel between network over and IP infrastructure
- Encryption is process of using a secret code to alter data to make it run intelligible to unauthorized parties
- There are three types of VPN
- Secure remote access
- Intranet access (site to site)
- Extranet access (site to site or site to internet)