unblock dns server

Although Linux has not made noticeable progress in the world of desktop computing, it is already a small celebrity as a Web server. Thanks to its excellent reliability, we can safely run all the important service programs that are necessary for today's internet age on Linux. As a result, some of the most common uses of Linux include being used as mail servers, Web servers, and DNS servers. Here we'll look a

1, the concept of universal Domain name resolution: If the user login mageedu.com, input error, input ww.mageedu.com, mageedu.com NS Server is unable to judge ww this domain name. So in order to prevent this error. The configuration of the NS server for a small web site can be defined in an item *.mageedu.com. To boot the user who entered the error can also access the site. But some of the big Web sites

The speed of surfing the Internet, and DNS server domain name resolution ability is closely related, I hope the internet surfing smooth sailing, we must find ways to ensure that the DNS server efficient and stable operation. To do this, we only have the workaround, dig deeper, and be good at using some of the details o

transaction with the client on this lease. this is probably the last time the client was renewed. FAQ Problem 1: inode authentication failure (connect failed) Solution: User Permissions? (Failed occurs when the Administrator uid is set to 0) Change uid back to 1000, or the reason for the inode's execution permission, change its execution permission, or change the owner and group? Disconnect and reconnect. Or restart inode and try again. Problem 2: inode connection timeout (overtime ). Solution:

Author: syd168 15:09:18 from: Mr. Linux I. Basic DNS knowledgeAs we all know, in network communication, data links Use MAC addresses. The network layer uses IP addresses, and the transport layer uses port numbers, each of which has its own identification method. IP addresses are the most closely related to users. Each incoming computer (whether Internet or intranet) must have its own IP address to ensure correct inform

DNS server is not unfamiliar to everyone, the site to do the domain name resolution to the corresponding IP address so as to achieve the purpose of resolution. Webmaster daily to do the station outside the optimization, select the site server and whether the DNS will become a hidden in the site behind the killer? The s

DNS (Domain Name System): Provides a mapping of domain-to-IP addresses on the InternetDomain name: Also known as hostname, FQDN (full qualified domain name fully qualified domainname)Basic information:The bind service is typically used in Linux to provide a DNS serverApplication Layer ProtocolBased on UDP53 port number: for queryingBased on TCP53 port number: for master-Slave

转载请说明出处：http://blog.csdn.net/cywosp/article/details/38017027 在上一篇文章（http://blog.csdn.net/cywosp/article/details/38014581）中讲到了使用HTTP重定向来实现server的负载均衡，本文则解说还有一种实现server集群的负载均衡方案——DNS域名解析。 DNS（Domain Name System）是因特网的一项服务，它作为域名和IP地址相互映射的一个分布式数据库，可以使人更方便的訪问互联网。人们在通过浏览器訪问站点时仅仅须要记住站点的域名就可以，而不须要记住那些不太easy理解的IP地址。在

DNS load balancing technology is to configure multiple IP addresses for the same host name on the DNS server, the DNS server returns different resolution results for each query based on the IP address recorded by the host in the DNS