IT Network Security

Network is defined as set of interlinking lines or the linked computers or interconnected computers. Network security is important for any computer although it is complicated to understand, it can be tackled by well experienced and skilled technicians who are well versed with the software programs, there are various things that a technical expert considers when he is deals with IT Network security, Everyone, nowadays is concerned about the IT network security of their computers, so one should be very much aware, how to install network security in their computers.

There are a number of ways through which you can secure your network like Firewall, antivirus programs etc. A user should have the understanding how to manage the risk personally, at home or at work place. Our computer administrators should confront the various threats that our computer may face, and should be well known how to manage the risk, and how to fix the errors in your computer.

You should always go for expert technicians who can provide you the best tech support to prevent your computer and internet network against various attacks or various threats. The right tech support can provide you the best support to install the updated and best software protections so that you can use your internet or network free from errors, you can use your computer free from security threats, if you want to download any file or you want to visit any website, your computer should be free from all the threats.

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Network security devices

Biometric information includes of any biological data, like as fingerprints, that technology able use to identify, authenticate or confirm an individual uniqueness. Unlike passwords or security cards that hackers may be steal or copy, this information is hard to replicate. Network security administrators has start using biometric authentication tools in both corporate and government settings. Such devices generally includes of a scanner for taking biometric input, software that transform biometric information or data into digital form and indexes it or comparing it to existing information and stored biometric information as a database.

List of Biometric Tools for Network Security:-

Fingerprints of person:-

Biometric experts recognize fingerprinting the cheapest and widest used biometric tool for network security purpose. Individual users seeking to log into a network able to place a finger on a scanner, which would read the print and after then compare it to the stored and recorded of that individual person’s fingerprints. Network administrators would also combine fingerprint recognition with a PIN card or password system, in what is considered to as strong authentication service (SAS). Many manufacturer offer these scanner and software packages and softwares.

Irises:-

Network security could also use iris scanners to authenticate of user identity. These devices are need a potential user to line up his or her eye with a scanner that reads the individual different pattern of blood vessels in the eye. Then software compares the scanned or check image with a pre recorded iris pattern. Optical, contact lens and eyeglasses do not affect the software capacity to authenticate identity.

Facial Recognition:-

Airports and casinos are already using facial recognition software to identify card counters and terrorists, respectively. Network security administrators could also use this biometric technology. Here, an individual seeking access will encounter a scanner that will take down the image of that person’s face. The software will then correlate the image with specified and particular prerecorded biometric markers of that person face, like distance between the eyes or shape of his or her forehead. These biometric markers allow the software to identify an individual even if he or she has changed his hairstyle, grown up beard or put on the glasses on his/her face.

Voice Recognition:-

Like a the CIA authenticates and recognized Osama Bin Laden’s voice from released videotapes by comparing it to an presenting registry of his vocal patterns, network security administrators able to use the same biometric technology to get grant access to computer networks. In whole of this process, an individual would repeat certain phrases in the voice scanner or microphone. The software will then compare the voice tract and accent of that person voice beside a pre stored recording of those same phrases. Recognition software of Voice can even differentiate the vocal patterns of even twins human.

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Forgot windows network security key

Network security Key helps to protect the personal information and files on our wireless network which can sometimes be seen by people who pick up our network signal. It can lead to identity theft and other malicious acts. A network security key can help to protect your wireless network from these type of unauthorised access.

Risks involved without network security key

Wireless networks frequently extend more than 300 feet from your wireless router. If you live in an apartment, dorm, you may have dozens of neighbours who can access your wireless network. If you live in a house, your neighbours and even people on the road may be able to connect to your network.

People who may connect to your wireless network might be able to:

•	Slow down the Internet performance.
•	View files on your computers and spread hazardous software.
•	check the Web sites you visit, read your e-mail and instant messages as they travel across the network, and copy your usernames and passwords.
•	Send spam or perform criminal activities with your Internet connection.

 

By setting up security features on your wireless network, you can make it very difficult for unwanted guests to connect.

 

The Procedure to get windows network key is given below:

 

First hard wire to the router and verify you have an internet connection.

Then got to start –click on run –and type cmd

Then in dos box type ipconfig /all

Check the default gateway

After that open internet explorer and type in the default gateway number from above in the address bar ( The place you type the website address example: http://www.google.com)

Then it will prompt you for a password.

Most Linksys have no username and admin as the password by default, or what you changed it to when it was setup.

If this doesn’t work you have to reset the router (read as loose all settings and start over on your router)

If you do get logged in then go to the wireless tab and then security and write down your key or you can change it to something you will then know.

 

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Home Network Security

Use virus protection software, use a firewall, don’t open unknown e-mail attachments, don’t run programs of unknown origin, keep all applications (also your operating system) patched, turn off your computer or disconnect from the network when not in use, disable all files and folder with hidden extensions, disable java and java script, disable ActiveX if possible make regular backups of your important data, make a bootable disk for emergency, Securing a Home network, not to mention an entire network, is a not as simple as flicking switch, it requires you to eliminate most vulnerabilities starting with the most obvious. Even if you are using the antiquated Windows XP operating system, you can still implement an overall home network security system just as long as you know how to. But if you want to try it or just know the basics, here are some tips:

Boot only from your primary hard drive, password protects your computer/laptop, restrict access to resources, Encrypt wireless network always.

• Supports for Home Network Security.
• A team of certified technicians for all network security issues.
• Disable all files and folder with hidden extensions.
• We keep your network protected against all online and internal security threats.
• Keeping your network security free from all risks.
• Keeping you safe from hacking, port-scanning, sniffing and virus.
• Disable java and java script, disable ActiveX if possible.

The two main methods hackers use to figure out passwords mean there are a couple of essential steps to choose a password which will enhance your network security. The first step hackers take is to run an automated program which runs through all the words in the dictionary to see if they are right. This means you should keep away from a password which is simply a word; it’s best to use a mix of letters and numbers. The second, hacking technique is to simply try every likely combination of numbers and letters. This means you should use the best password possible each extra digit makes your password at least 36 times more secure. Another step you can take to improve your network security through passwords is to change passwords frequently. Even if there is only a tiny chance that someone has figured out your password at any one moment, changing it reduces that chance back to zero. It’s also vital to avoid using the same password in unusual situations as this increases the latent problems if your password is discovered.

Wireless network security is mainly important as it is much easier to physically intercept data from such connections. Where you have the choice, use WPA2 encryption as this is the most secure method. If this isn’t available, prefer standard WPA over WEP unless WPA is not available. Make sure to turn off the wireless connection whenever you are not using it, particularly if you ever plug your laptop into a wired network. And when using a Wi-Fi hotspot, verify with staff to make sure you are connected to the actual network rather than a bogus connection launched by nearby hackers.

 

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How to fix network security issues on Windows Vista-based PC

Here are the steps for quickly fixing network security issues:

1. First we have to search the name of the network adapter that you are using to connect, you can skip this if you already know the name of  network adapter.
   1. Open the Network and Sharing Center (Start > Control Panel > Network and Sharing Center)
   2. Click on “Manage network connections” under “Tasks” on left side.
   3. Note the name of  device in “Device Name” column for the connection that you are using (e.g. Intel® PRO/Wireless 3945ABG Network Connection)
2. Now find the GUID of this adapter.
   1. Open the registry editor: Start > type in ‘regedit’
   2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards\
   3. Look through the numbered sub-keys and write down the “ServiceName” for the one that has the name of your network card in the “Description.”
   4. Keep the registry editor open because we will be changing another key in the next step.
3. Once you have the GUID of the network then we have to toggle the broadcast flags.
   1. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces
   2. Make sure to set the DhcpConnForceBroadcastFlag as described in the “More Information” section of the knowledge base article.
4. Finally, restart your computer.

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How to Implement Network Security

One should know the ways to safeguard your network in order to reduce the risk from being compromised by hackers, worms, viruses and other intrusions.

 

Changing Router Default Password

Don’t apply default password on router. You should change the password after initial router configuration. Don’t use easily guessed password, such as your name, pet’s name, birth date, etc. A good password is composed of number, alphabet (upper case/lower case) and symbol.

 

Enabling Firewall on Router

If the router provides firewall characteristic, use it ! Tune and create some testing on firewall. This feature is useful to fall unknown traffic from Internet and also can limit the traffic going out to Internet.

 

Router Firmware Upgrade

Generally router vendor will release new router firmware from time to time for setting up some software bugs and patching security holes. You should upgrade the router firmware when it’s available. The firmware can be found on vendor website.

Note: You may lose router configuration settings when you upgrade firmware, so make sure you write down the router settings prior to you upgrade its firmware.

 

Computer Security

You need to update computer OS system and software as often as you can. Again, the updates will patch security holes and fix software bugs. For Windows OS users, you can use Windows Automatic Updates to renew the system. If you have set up virtual servers or DMZ hosts, make sure you have latest system and software update installed. This is very important due to virtual server and DMZ hosts are exposed directly to Internet and easily to be compromised if not updated. Also, installing and updating antivirus and anti-spyware software is a must to protect your computer.

 

Avoiding Phishing Attack

Beware of phishing attack ! Do not simply click on the link in email, facebook, twitter or other websites, the link might bring you to malicious website to install malware on your system or lure you into given that online banking or other personal information. Common phishing attack typically appears to be sent from bank, paypal, financial organization or online portal, so you should always check with respective organization contact first before doing anything. Delete emails from unknown sender; don’t even try to check the content. If you need more information, ensure this anti-phishing website to learn more.

 

Physical Network Security

Many people might ignore physical network security, however you should keep an eye on it. Do some inspection on physical network sometimes to see any unrecognized devices connecting to router or identify extraordinary setup on network.

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Computer networks and network security

A computer network referred to as a network, is a collection of computers and devices interconnected by communications channels that make easy communications among users and allows users to share resources. Networks may be classified according to a broad variety of characteristics.

Types of Network

Personal area network

A personal area network (PAN) is a computer network used for communication among computer and different information technological devices close to one person. Examples of devices which are used in a PAN are personal computers, printers, fax machines, telephones, PDAs, scanners, and even video game consoles. A PAN may contain wired and wireless devices. The reach of a PAN in general extend to 10 meters. A wired PAN is generally constructed with USB and Firewire connections while technologies such as Bluetooth and infrared communication typically form a wireless PAN

Wide area network

A wide area network (WAN) is a computer network that covers a large geographic area such as city, country, or spans even intercontinental distances, using a communications channel that combine many types of media such as telephone lines, cables, and air waves. A WAN often uses transmission services provided by common carriers, such as telephone companies. WAN technologies normally function at the lower three layers of the OSI reference model which are the physical layer, the data link layer, and the network layer.

Virtual private network

A virtual private network (VPN) is a computer network in which some of the links between nodes are passed by open connections or virtual circuits in some larger network (the Internet) instead of by physical wires. The data link layer protocols of the virtual network are said to be tunneled through larger network when this is the case. One common application is secure communications through the public Internet, but a VPN may not have explicit security features, such as authentication. VPN, for example, can be used to separate the traffic of different user community over an basic network with strong security features.

VPN may have best-effort performance, or may also have a defined service level agreement (SLA) between the VPN customer and the VPN service provider. Generally, a VPN has a topology which is more complex than point-to-point.

Enterprise private network

An enterprise private network is a network build by an enterprise to interconnect various company sites, for example production sites, head offices, remote offices, shops, in order to share computer resources.

Firewalls

Firewalls are the most important part of a network with respect to security. A firewalled system does not need every interaction or data transfer to be monitored by a human, as automated processes can be set up to support in rejecting access requests from unsafe sources, and allowing events from recognized ones. The crucial role firewalls play in network security grows in parallel with the regular increase in cyber attacks for the purpose of stealing/corrupting data, planting viruses, etc.

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Components of network security

Network security involves all actions that organizations, enterprises, and institutions undertake to protect the value and ongoing usability of assets and the integrity and stability of operations. An effective network security strategy require identifying threats and then choose the most effective set of tools to fight them.

Threats to network security are given below:

1) Viruses

2) Trojan horse programs

3) Vandals

4) Attacks

5) Data interception

6) Social engineering

Network security tools are:

1) Antivirus software packages: These packages respond to most virus threats if regularly updated and correctly maintained.
2) Secure network infrastructure: Switches and routers have hardware and software characteristics that support secure connectivity, perimeter security, intrusion protection, identity services, and security management.
3) Virtual private networks: These networks provide access control and data encryption between two computers on a network. This allows remote workers to connect to the network without the risk of a hacker intercepting data.
4) Identity services: These services help to identify users and control their actions and transactions on the network. Services comprise passwords, digital certificates, and digital authentication keys.
5) Encryption: Encryption ensures that messages cannot be intercepted by anyone other than the authorized recipient.
6) Security management: This is the bond that holds together the other building blocks of a strong security solution.

Network security components help to protect your device form external intrusion. Network security components, such as Internet Protocol Security (IPSec) and Secure Socket Layer/Transport Layer Security (SSL/TLS), can improve security when accessing a device over the network.

In addition if you add network security components to your configuration, other precautions should be taken to protect your device. Disabling unused ports, and removing unused services, such as Simple Network Management Protocol (SNMP), reduce the risk of intrusion.

1)      Internet Protocol Security (IPSec)- It verifies and authenticates IP packets, and the key binary for this are Ipsec.sys, Ipsecsvc.dll, Winipsec.dll

2)      Secure Socket Layer/Transport Layer Security (SSL/TLS)- It encrypts data exchanged between systems. And the required components are Local security authority subsystems (LSASS), cryptographic network services, primitive: Secur32, Primitive: Crypt32, Primitive: Cryptdll, Primitive: Netapi21, Net logon/Net join.

3)      Secure RPC- Secure RPC adds security to COM+, DCOM, and RPC. The required components are RPC Local Support, Primitive: Secur32, Primitive: AuthZ, Secure RPC over Kerberos, Secure RPC over Negotiate, Secure RPC over NTLM, Secure RPC over SSl.

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Technical support for fixing computer network based security systems

Small and medium-sized businesses use the Internet and networked applications to get in touch with new customers and serve their existing ones more efficiently. on the same time, new security threats and legislation puts better pressure on business networks to be consistent and secure. Our technician delivers comprehensive, affordable, integrated security solutions help to ensure business continuity, maintain customer privacy, and reduce operating costs.
According to recent survey, security is the largest challenge facing. Ever-changing security threats from both inside and outside the network can cause confusion, affecting profitability and customer satisfaction.
Computer worms and viruses stay the most common security threat. Worms and viruses can have a destructive effect. Smarter, more critical strains are spreading faster than ever, infecting an entire computer in seconds. crackdown the infected computers takes much longer. The tragic results are lost orders, corrupted databases, and angry consumers. As consumer struggle to bring up to date their computers with the latest operating system patches and antivirus software, new viruses can go through their defenses any day of the week. in the meantime, the spread of viruses and spyware by unsuspectingly accessing malicious Websites, downloading untrustworthy material, or opening malicious e-mail attachments. These attacks are accidentally invited into the computer, but still cause major financial losses. Security systems must detect and prevent worms, viruses, and spyware at all points in the network.
 malicious hackers break into networks to steal credit card or social security numbers for profit.people are at risk because they are seen as an easier mark than huge corporations. Protecting the perimeter of the network is a excellent start, but it isn’t enough, since a lot of information thefts have help from a trusted insider. Information theft can be expensive since they rely on satisfied customers and a good reputation. People that don’t sufficiently protect their information could face harm.

There are few steps which are of huge significance keeping security of network in mind.
 bigger computer networks should be divided into segments for managing of the network and easiness in finding culprit systems. Internet access should be clean by blocking port1433 and port 1434 or one can use various firewall software to execute such type of filters. All unnecessary or not required ports should be blocked for any chance of being misused; only necessary communication ports should be unlock to data transfer.
 Keep nearer look on open ports, Port 80 is the most regularly used port for http access.                                   Network administrator should make sure to keep all the systems with server updated operating system files and latest patch. These dangerous updates and patch keep the system safe from vulnerabilities. at any time updates are free clients machines download and install them and secure them to the greatest level, same should be done for server operating system but keep nearer look in updating server OS. Third party security tools are also obtainable and can be installed after testing for meeting enhanced security measures.
Several times having a restricted Network administrators can help in keeping network safe as the less people manage the network less is the chances for security malfunctioning, it is also essential to not give any local client computer admin rights. Older known threats can attack another time, it should be kept in mind to keep computer network secure from newest ones should also be secured from older know attacks. Windows known services Telnet, Clipbook must not be disable, they have certain job to perform, do not disable any default service till the time you are sure about it and you also know that what are you doing. Creating, configuring and implementing security policies can be useful in keeping network secure. Keeping network users educated on these policies and making sure to send notice to all the clients if any updates are made in these policies. All these security actions are useful and come with prices. We should also frequently update network users for newest threats and what should and should not be done for keeping things smooth and secure. We must also help networks users to assist in unnecessary emails which can be dangerous to network.

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