In order to keep the description of the operation process as concise as possible, there is no excessive explanation added in the above content, and you will stay here for a unified description.
1. The nature of "Proxy Server"
Two values related to TCP HTTP, remote_addr and http_x_forwarded_for.
(1) remote_addr always obtains the IP address of a host closest to the Web server. If no proxy is used, this value is the visitor's IP address. If a proxy is used, this value is the IP address of the pro
We know that the VPS server is a virtualization technology, build VPS server virtualization software and new cloud architecture solutions are many, they have advantages and disadvantages, therefore, different VPS Server service providers may use different virtualization technology to build VPS servers, Similarly, the c
VPS Exclusive host has been small and medium enterprises and high-end webmaster users of the best choice to build a station, and, with the cloud computing technology application and development, the VPS host prices more civilians, making more people contact with VPS host, and often use VPS host. At the same time,
First look at the VPS is what: plain English is that it is from a physical server divided into multiple ' virtual ' server, has its own independent public network IP, independent memory, independent CPU, independent operating system configuration, independent hard disk space, etc., can be convenient to restart the server alone, its own installation program, Like a smaller version of the physical server, use it to do multiple virtual hosting, Enterpris
Eduvps is a dedicated to learn and provide a free VPS host, because it is purely personal to provide and focus on the use of learning tests, so even if the application of the Eduvps free VPS, there are not open machine, can not connect VPS host and so on, And most of the VPS host applications have different problems in
If you think that the virtual host cannot meet your needs, want more resources, and feel that the whole machine is a waste, the VPs server may also be suitable for you.
In terms of price, the VPs host is between the virtual host and the host lease. The performance of the website is more stable than that of the virtual host. users on the VPs do not compete for
I personally feel that this platform has poor autonomy, whether it is for customers or carriers. For customers, this platform is a virtual operating system and cannot be set on their own in many aspects. It is typical of Windows virtual memory management, which is not good. For sellers, the operation of this platform is inseparable from the support of swsoft. Of course, small-scale operators do not have enough technical strength to maintain the platform, but they must still be unable to do witho
Personally feel the platform is less autonomous, whether it is to the customer or to the operator. For customers this platform is a virtual operating system, many aspects are not autonomous settings, typically Windows virtual memory management, very bad. For businesses, this platform can not operate without swsoft support, of course, the smaller operators do not have enough technical strength to maintain, it is certainly inseparable from this price is not the "support" of the Philippines, but fo
VPS or server often need VPS or server often need to regularly backup data, scheduled to restart a service or scheduled execution of a program and so on, generally in Linux use crontab,windows below is the use of scheduled tasks (win is the graphical interface setup is relatively simple), The following mainly describes the installation and use of crontab on Linux vps
Client-side method to back up data
1, install and configure Dropbox Linux client
Install Linux command line version Dropbox on VPS:
32-bit:CD ~ wget-o-"https://www.dropbox.com/download?plat=lnx.x86" | Tar Xzf-64-bit:CD ~ wget-o-"https://www.dropbox.com/download?plat=lnx.x86_64" | Tar Xzf-After the download is complete, run Dropbox
~/.dropbox-dist/dropboxd
The first time you run the command, you are prompted to access the URL, and you can bind t
Based on the NTP network pair,
Java code
The code is as follows:
#date-R
November 18, 2012 Sunday 19:33 23 cstlinux The tool for using network pairs under the system is ntpdate, and if Ntpdate is not installed, ntpdate must be installed: under CentOS:
Java code
The code is as follows:
#yum-y Install ntpdate NTP
Under Debian or Ubuntu:
Java code
#sudo apt-get install-y ntpdate ntpntpdate
After installation, you can use Ntpdate to update the Linux system (when we use Windows Time server
Java anonymous objects and anonymous internal classes, java anonymous objects
Anonymous object: an object without a name.
Non-Anonymous objects:
ClassName c = new ClassName ();
C. run ();
Anonymous object:
New ClassName (). run ()
The so-called new syntax 2 in. NET: Anonymous class, anonymous method and extension method,. net Anonymous
Opening part: in the previous article, we learned about the so-called new syntax, such as automatic attributes, implicit types, and automatic initializes. This article continues, look at anonymous classes,
VPS or server often need VPS or server often need to regularly backup data, scheduled to restart a service or scheduled execution of a program and so on, generally in Linux use crontab,windows below is the use of scheduled tasks (win is the graphical interface setup is relatively simple), The following mainly describes the installation and use of crontab on Linux vps
If we start to modify the default port, even if we need to guess and crack the password, we need to find the port, at least to increase the difficulty of the VPS intrusion, in this article, the old Chiang will share how to modify the VPS default SSH port.
The first step, vi/etc/ssh/sshd_config
Using Xshell or Putty login VPS, the default
Anonymous internal class, anonymous
Anonymous internal class, similar to the anonymous object we have learned before...
Anonymous internal classes are simplified Writing of internal classes. The premise is that there is a class or interface. The classes here can be specific
a proxy is used, this value is the IP address of the proxy server. If multiple proxy servers are connected, this value is the IP address of the last proxy server before the web server.Remote_addr is determined by the TCP/IP layer and cannot be modified or forged.(2) http_x_forwarded_for, because the value belongs to the HTTP part rather than the TCP/IP, no matter what the value is, it does not affect data transmission. In fact, in general, if a visitor directly accesses the web server, this val
. If a proxy is used, this value is the IP address of the proxy server. If multiple proxy servers are connected, this value is the IP address of the last proxy server before the Web server.REMOTE_ADDR is determined by the TCP/IP layer and cannot be modified or forged.(2) HTTP_X_FORWARDED_FOR, because the value belongs to the HTTP part rather than the TCP/IP, no matter what the value is, it does not affect data transmission. In fact, in general, if a visitor directly accesses the Web server, this
, if not using the proxy, this value is the visitor's own IP, if the use of proxy, this value is the proxy server IP, if the connection through multiple proxy servers, This value is the IP of the last proxy server before reaching the Web server.
REMOTE_ADDR is determined by the TCP/IP layer and cannot be modified without forgery.
(2) Http_x_forwarded_for, because this value belongs to the HTTP part, not TCP/IP, so this value, regardless of what it is, does not affect the transmission of data. In
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