netscaler vpx

(taking PHP as an example ), you cannot directly use the $ _ SERVER ['remote _ ADDR '] variable to obtain the real IP address of the user. In this case, the IP address of the Nginx SERVER Load balancer is obtained. In this case, you need to add the Header information X-Forwarded-For in the Nginx reverse proxy so that the backend SERVER can get the user's real IP address through $ _ SERVER ['HTTP-X-FORWORDED-FOR. Refer to the commonly used functions for getting user IP addresses. 5. dynamic and

Recently, network equipment has been monitored, including traffic and performance monitoring for switches, firewall, NetScaler, and other network devices. All monitoring software (Nagios, zenoss, zabbix, and so on) monitor network devices through the SNMP protocol. When introducing the SNMP protocol, you must first understand the SNMP concept: 1) Simple Network Management Protocol (SNMP. Consists of a set of network management standards, network admin

= "wkiol1o6cl_rgytzaaexa26312q165.jpg"/>Xenmobile architecture and components 650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M02/39/62/wKiom1O6Cq_wLmckAAKSebCffpw006.jpg "Title =" 1.png" alt = "wkiom1o6cq_wlmckaaksebcffpw006.jpg"/>Worx home The Citrix Worx home application enables IT departments to implement Mobile settings and security policies on mobile devices. Employees can use this application to access a unified enterprise application store and obtain real-time support service

The same win service, deployed on both A and B servers, before using NetScaler load Balancing, A and B are requested frequently, almost every moment is requested. PS: The normal process of releasing the win service is to stop win service, Release win service program, start win service Q: When upgrading the win service, how to ensure that normal requests are not interruptedUse load balancing mechanism to upgrade servers in turnN ' s cuts all requests t

frequent exchanges, and the loss of response can only restart the server.L Low Costbuy F5 big-IP netscaler hardware load balancer switch Hundreds of thousands ofNginx based on BSD Open source protocol free, commercially availablel support rewrite rewrite rulesability to distribute HTTP requests to different back-end server groups based on domain names and URL differencesl built-in health check functionif a Web server on the backend of Nginx proxy goe

server, HBA card, network card in the XenServer Compatibility List, http://http://hcl.xensource.com/ If you encounter similar instability, compatibility issues, visit the Https://www.citrix.com/support Web site, check the corresponding network card, HBA card if there is a new driver disk can be upgraded. Of course the server's BIOS is also to be retrieved. Through the CIS website, you can get richer and more detailed reports, ensure that we have an effective analysis, and more quickly i

Summary : For a large web site, load Balancing is an eternal topic. With the rapid development of hardware technology, more and more load balancing hardware devices emerge, such as F5 big-IP, Citrix NetScaler, Radware and so on, although can solve the problem, but its high price is often prohibitive, So load balancing software is still the perfect choice for most companies. Nginx as a rising star of webserver, its excellent reverse proxy function and

Since last year, Citrix products have basically been adhering to the last day of each quarter, a large-scale update of the Xenapp/xendesktop 7.6 version of the habit, September 30 This day no accident, released Feature Pack 3.An important part of this update is full support for Windows 10. As Microsoft released Windows 10 on July 29, manufacturers began supporting Windows 10 with support for Windows 10 through the TP version of the VDA earlier. Citrix now begins full and formal support for Windo

/wKiom1ccKZOiItqbAAEgcpPun_M323.png "title=" Picture 7.png "alt=" Wkiom1cckzoiitqbaaegcppun_m323.png "/> (7) ca After the certificate expires in netscaler The certificate has been changed. However, there will still be some clients get the old ca certificate, including thin client machine and pc ca certificate. (1) obtain CA Certificate (of course the Administrator provides the best) Download the new certificate in the normal user's

other system resource consumption is very low, running very stable.In China, there have been Sina blog, Sina Podcast, NetEase News, six rooms, 56.com.discuz! official forum, water and wood community, watercress, domestic SNS, thunder online and many other websites using Nginx as a Web server or reverse proxy server. three, Nginx features 1 , it can be high concurrent connection , the official test can support 50,000 concurrent connections, in the actual production environment can support 2 to 4

) Summary 1. Each connection consumes a certain amount of resources, such as CPU, MEM, so the real value is often difficult to reach the theoretical value; 2. Depending on the protocol, the maximum number of connections that can be reached is different, such as http/1.0 connection creation and shutdown are very fast, and the browser has a limit on the number of concurrent connections, so, It is difficult to reach the maximum theoretical value. http/1.1 supports streamline technology, and multip

Directory1. Introduction of common cluster environment2, LVS three types of introduction3, LVS various scheduling algorithm introduction1. Introduction of common cluster environmentBefore talking about LVS, say the cluster, depending on the applicable scenario, IT staff may want to run the server longer, preferably 365 days a year, 72 hours a day uninterrupted operation, you may want to run the application faster, and some digital fields need to perform large-scale numerical operations, These al

First, the cluster type:1. Load Balancer Cluster (LB cluster--load balancing):Considering the increase of server capacity is the main technology for scalability expansion.Consider an extension when the following scenario occurs for concurrent requests:1200 request: 1s1500 Request: 2s1800 Request: 10sExtension Type:Scale up: upward, requiring more powerful servers, the downside is that the upper limit is limited and its cost-effective.Scale out: More than n hosts are required.A, LB software solut

processing, when your account data is encrypted before it is sent, and at the other end of the network, the presentation layer decrypts the data received. In addition, the presentation layer also needs to decode and encode the image and file format information.layer seventh of the OSI model: The application layer simply means that the application layer is an interface that provides access to network services for operating systems or Web applications, including file transfer, file management, an

This article mainly introduces the installation and configuration of Nginx, has a certain reference value, and now share to everyone, the need for friends can refer to Nginx Learning Practice First, choose Nginx purpose High concurrent connectionsThe official test Nginx can support 50,000 concurrent connections, the actual test can reach about 30,000, according to this calculation, daily can handleHundreds of visits, using the latest epoll (Linux 2.6 kernel) and Kqueue (FreeBSD) networ

address of the receiving system to address the construction, maintenance, and cancellation of Physical connection optical fiber, coaxial cable, and, Twisted pair wires, reconnections, and hubs 3. multi-line multi-region smart DNS resolution and hybrid load balancing 4. after Nginx Reverse proxy configuration uses reverse proxy, the backend WEB server (taking PHP as an example ), you cannot directly use the $ _ SERVER ['remote _ ADDR '] variable to obtain the real IP address of the user. in this

LB (load balance) Load Balancer clusterPrinciple: When a user's request comes in, it is sent directly to the dispatcher (Director server), which then distributes the user's request intelligently and evenly to the backend really server (real server) according to the pre-set algorithm. If different machines may request data differently, in order to avoid this situation, use shared storage to ensure that all users request the same data.Common open source software for load balancing is: lvs,keepaliv

Note: This article is mainly about the LVS in lb (centos6.5-x86_64 system)First, the basic concept of the cluster:A cluster is a group of computers that are interconnected by a high-speed network, and they form a group and are managed in a single system mode. When a customer interacts with a cluster, the cluster is like a separate server . Cluster configuration is used to improve availability and scalability. 1.1. Common ways to extend a server:Scale up: Add configuration upScale out: Add a ser

Based on the huge network structure, the use of Cluster Server brings a lot of load problems such as traffic. So the relative, load-balanced technology also emerged. Each technology requires product support, so let's now look at one of the F5 load balancers. So first of all, we first introduce the structure of the product function.Many vendors have launched a load balancer dedicated to balancing server load, such as NetScaler of F5 Network's Big-ip,ci

NetScaler 11.1.51 started adding modules for direct Test GSLB configuration in configuration > traffic Management > GSLB 650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M02/8C/DF/wKiom1h8QeHCwRGiAADyrdydT7s744.png "title=" 11. PNG "style=" Float:none; "alt=" Wkiom1h8qehcwrgiaadyrdydt7s744.png "/>Click Test GSLB Testing GSLB650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M02/8C/DC/wKioL1h8QeCTH2G9AADyy7Bdj6A980.png "title=" 12. P