Overview of McAfee Total Protection Features

Anti-Virus and Anti-spyware Protection:
Detects, blocks, and removes viruses, spyware, adware and rootkits.

Network Manager:
Lets you easily fix security issues on your home network from one PC. Provides easy and automatic printer and file sharing across computers on your home network that you trust.

Web Site Safety Ratings:
Adds safety ratings to sites and search engine results based on comprehensive spam, adware, and online scam safety tests so you know exactly what website is safe to visit.

Anti-phishing:
Warns you before accessing dangerous scam websites that try to steal your personal information.

Shredder:
Allows you to effectively remove any and all traces of confidential files from your computer.

Computer maintenance:
Provides automated tools to keeps your PC running at peak performance.

Identity Protection:
Let’s you shop, bank and trade online safely by asking permission before personally identifiable information like PIN’s, bank accounts, Social Security numbers are sent from your PC.

IMPROVED Anti-spam:
Helps keep your inbox free from unwanted, fraudulent and offensive emails.

Parental Controls:
Let your children go online safely at times that you define.

Data Backup:
Save copies of your most valuable files automatically wherever you want on a CD/DVD, USB, external, or network drive.

NEW Network Monitoring:
Alerts you when intruders try to connect to your wireless home network.

Email and IM Link Checker:
Search or click on links from friends, knowing your PC won’t be exposed to viruses or threats. Link Checker identifies and prevents you from clicking on harmful web site links in your browser, email, or instant messages.

NEW File Protection:
McAfee Anti-Theft encryption software lets you password protect your files on your PC

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How Spyware Get into your Computer

Spyware gets on your computer in one of several different ways.

• Along with software you download from the internet and install on your system.
• Come from email attachments (much like viruses) and automatically install themselves on your computer when you open the email message.
• Hackers find an open port on your computer and use the “back door” to install basically anything they want.
• The more malicious types, like keystroke loggers, can even get installed by someone with direct physical access to your computer such as an employer, suspicious spouse, business competitor, or someone who wants to know exactly what you’re doing.

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How the Packet reach from One point to another on Internet

1. After the initial TCP/IP three way hand shake has been negotiated, your web browser will issue a request to the web server hosting your homepage asking for its homepage.
2. This HTTP GET request information now has to be sent to the web server.If you select the write operation it will cause the data that application wants to send to be copied from the applications memory space to the socket send buffer within kernel space.
3. Depending on what transport protocol the application uses, the socket layer will call either UDP or TCP. Some applications use TCP or UDP as a Transport Layer protocol. DNS uses both UDP and TCP, while other applications such as TFTP will only use UDP. Once the socket layer calls the proper transport protocol, the data will be copied over into a socket buffer.
4. TCP will fragment this data if required. What happens if the browser’s request exceeds the MTU.TCP itself will fragment the data in order to ensure that the size complies with the Ethernet MTU limit of 1500 bytes. A key point to remember here is that fragmentation will occur at the TCP layer if the application invoked uses TCP as it transport protocol. If application is using UDP then fragmentation will happen at the IP layer.
5. At Network layer IP header is built and the all important IP addresses are added.
6. After this, the data then drops down to the data link layer where both the logical link control and media access control layers do their parts. Finally the data is now ready to transmitted by the physical layer as embodied by your NIC card.
7. Now it reaches to Ethernet Switch
8. After the packet goes through the switch it makes its way to the router, and may very well go through a firewall prior to the router as well.
9. At router if required NAT is performed, if you have the Private Address not a public Address
10. Now the packet travel through the many routers and every router route the packet based on its own routing table information. Once the next router receives this same packet it will consult its own routing table, and send it on its way based on what it considers the best path. Before this happens, the router will change several fields in the IP header of the packet. One of the fields that will change is the TTL field or “time to live.” Now, as part of the IP header has changed, the router must compute a new checksum value for the packet.Finally it reaches to its destination.
11. The physical layer will issue an IRQ to the CPU indicating that there is data to be processed. Once that occurs, the data is passed up the data link layer where the webserver will recognize the MAC as indeed being its own, and will pass it up to the IP layer. The IP address is in turn recognized as belonging to it so that it then passes the data up to the transport layer where it is put into the TCP buffer. At this point the application notices that the data is for it and it processes the information. The end result of this is that the information requested for in the GET request issued by the client is then sent back.

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Protect your Computer from Virus

• Use a high-quality anti-virus program, and be sure to update it regularly. Use it to scan any files, programs, software, or diskettes (even new software from a commercial company) before you use them on your computer.
• Make back-up copies of important documents or files and store them on separate diskettes. Making backups will also protect your information against accidental file deletion, diskette failure, and other damage.
• Whenever you use a computer in a campus lab, be sure to reboot or run “cleanup” before you start your session and log out when you end your session.
• Do not share commerical software with anyone. It is a violation of the author’s copyright to distribute such material, and it is a way to spread viruses.
• When you get public domain (PD) software for which the author has granted permission to make copies, get it from a reliable source. (For example, and individual you do not know is not a reliable source.) Before you run PD material, use an anit-virus program to inspect for known viruses.
• Always scan your disks and files after using them on another computer.
• Always scan all files you download from the Internet.
• Always scan Word or Excel file email attachments before you read them.

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