Virtual Host Common Sense

Virtual Host

What is a virtual host, and why use a virtual host?
The virtual host is the use of special hardware and software technology, a computer host into a "virtual" host, each virtual host has a separate domain name and IP address (or shared IP address), has full Internet server functionality. In the same hardware, the same operating system, running for multiple users to open different server programs, and each user has its own part of the system resources (IP address, file storage space, memory, CPU time, etc.). Virtual host is completely independent, in the view of the outside world, each virtual host and a stand-alone host performance exactly the same.
The advent of virtual host technology is an important contribution to Internet technology, is the Gospel of the vast number of Internet users. Because more than one virtual host to share a real host of resources, each user to bear the hardware costs, network maintenance costs, the cost of communication lines are greatly reduced, the Internet really become affordable by everyone network! Now, almost all American companies (including some families) have set up their own web servers on the Internet, and some of them are using virtual hosts!

What can a virtual host do?
My company provides the virtual hosting services can support the most advanced technology such as PHP, CGI, database hooks and so on. Users can easily manage Web sites through a browser:
A) to produce all kinds of statistical reports, site access statistics, various types of logs and so on.
b Self-backup and restore site data (including databases).
C Create your own mail account and mailing list.
D easy to modify their own pages through Frontpage2000 and Dreamweaver

What is a CGI program?
CGI is Common Gateway Interface abbreviation, is server-side and user communication program, it can make your Web page more vivid, network many tools such as search engine, message board, BBS, etc. are CGI programs. The CGI filename suffix is. cgi or. pl.

Can I run a CGI program on a virtual host?
Can, support Perl, C, C + +, Java and other language written CGI program. At the same time, many registrars will also provide you with a lot of ready-made common CGI programs for you to use, such as BBS, online orders, counters.

What is Web space?
Web space is the space that holds the content of a Web page.

What is log?
When the user's virtual host is working, the results of WWW access are recorded in some log files at all times. They record what time, what customers access to what files, whether or not to transmit success information, but the number of such information is very large, users can not directly from the log file to obtain intuitive results, We have advanced access statistics software installed on the server, after processing the user's log file, it obtains such as: in the past period of time (such as a week, one months), the user's virtual host received how many of this access, from where people visit the most times, which content is the most visited, The daily situation, the number of hours a day to access the most useful information, but also through the color of the stereo histogram to display the results.

I use CuteFTP to connect to the host, unable to list the directory, what is the reason for the socket hint?
When you log on to the host via the FTP software, the following error occurs in the status window: F
"Status:> Connecting data Socket ...
Error:> Failed to establish data socket "
This problem generally occurs because the client network exits conflict with the port settings of the server-side firewall, and you can cancel the PASV mode setting (generally the default) option in the FTP software settings. It is often easy to connect to an NT host.

What should I do when my virtual host is open?
After your virtual host is open, you should follow these steps:
A) upload the page.
b) Domain name resolution: Set the domain name resolution (including WWW, FTP)

What is static IP?
Static IP is an independent IP. It is usually called the extranet IP.

What does the My SQL database contain specifically?
a) concept; MySQL is a relational database system that can be used on a variety of popular operating system platforms (relational database RDBMS are a basic tool in many environments, from business, Many traditional applications in research and education environments use relational databases for applications such as search engines on the internet, and he has a distributed database relationship with client/server architectures.
b) Features: MySQL has a strong function, easy to use, easy to manage, fast operation, high performance, security and confidentiality characteristics.
c) Role: The primary function of a database is to organize and manage very large or complex information and web-based Inventory query requests not only to provide information to customers, but also to use the database for yourself to provide the following features:
(i) Reduction in the time of record filing
Ii. reduce the time of record retrieval
Third, flexible search sequence
Iv. Flexible output formats
Five simultaneous access to records by multiple users

What operating system does the "virtual host" take?
The most widely used operating system is the WindowsNT of Linux and Microsoft, both of which have their own strengths. Do not hesitate to choose Linux If you are not using a program written by. ASP. Because NT servers are more likely to be compromised than Linux.

What is spam?
Spam refers to the use of e-mail on the Internet to advertise the broadcast type of behavior. This behavior has put a lot of irrelevant or useless information into the mailboxes of many people, so it is becoming more and more disgusting, which is illegal in the United States. So if you have a server of your own, be sure not to use Open-relay, otherwise your server will be the sender of spam and may be rejected by many service providers to receive your mail.

What is anonymous FTP?
Anonymous FTP means that when you log on to an FTP server, the username is "anonymous" and you can log in. As can be seen, anonymous FTP is open to any user, but the user's privileges are very low after logon, generally only from the server file, and can not upload or modify the contents of the server. It can effectively help owners of Web sites provide files or software for users on the Internet to pass down.

What is the Access statistics report?
When the user's "virtual host" is working, at all times, the results of the WWW visit are recorded in some log files, they record what time, what customer access to what files, whether or not to transmit success information, but the number of such information is very large, it is difficult for users directly from the log file to obtain intuitive results. To this end, we installed advanced access statistics software on the server, after processing the user's log file, it obtains such things as: In the past period of time (such as a week, one months), the user's "virtual host" has received the number of visits, from where people visit the most times, which content is accessed the most number of times, What is the daily situation, how many hours a day to visit, and so useful information, but also through the color of the stereo histogram to display the results.

What is 1U
1U equals 4.45 cm

Can I run my CGI program on "Virtual host"?
Can, support Perl, C, C + +, Java and other language written CGI program. The service provider may provide you with a lot of off-the-shelf CGI programs for you to use, such as BBS, online orders, counters.

Does the performance of each "virtual host" degrade as a machine's resources are allocated to several "virtual hosts"?