To use a vro, you still need to prevent "viruses ".

If I access the Internet through a router, is anti-virus software not installed secure? Should anti-virus software be installed? Even if you use a vro to access the Internet, you must install anti-virus software. Vro supports address translation and opening and closing TCP/IP communication ports. Although these functions can prevent virus spreading and other attacks from the Internet, there are still attacks that cannot be prevented.

Vro cannot completely prevent attacks

For example, a vro cannot defend against viruses in email attachments. Because the virus has been saved to your PC as part of the email. In addition, viruses in software downloaded from the Internet cannot be detected.

What kinds of attacks can a vro defend against? TCP/IP communication over the Internet uses a universal IP address to exchange data with the contact's personal computer and other terminals. The Global IP address is the IP address assigned by the service provider when users access the internet. A vro has the ability to share this general IP address on multiple PCs, such as IP disguise and IP Masquerade ). If you use the address translation function, you can use a fixed IPPrivate address on each PC that shares one access line. A fixed IP address is a type of IP address that can be freely used in a LAN that does not directly access the Internet. It is automatically allocated by the router.

Vro Security

Almost all routers have the data packet filtering function and can control data based on different port numbers. Fixed IP addresses cannot be used in the Internet (cannot be routed). It is very difficult to directly access a PC with such IP addresses allocated through the Internet. That is to say, the possibility of external intrusion on a PC connected to the Internet through a router is very small. In addition, the port number is also used in TCP/IP communication. Data is transmitted to the target PC through an IP address, but the port number must be used to identify which application on the target PC uses the data. Generally, the port number used by the application software is fixed, And the vro determines whether the data passes through or intercepts or closes the port based on the port number ). The recently raging W32/MSBlaster and other viruses exploit the vulnerabilities in software services using specific port numbers. Therefore, only using the router's port disabling function can effectively prevent such viruses from being infected.

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