unblock dns server

In CentOS7, manually set the DNS in/etc/resolv. conf. after a while, the system will overwrite or clear the DNS. Different from setting DNS in CentOS6, there are several methods: 1. use the new command line tool nmcli to set # display the current network connection # nmcliconnectionshowNAMEUUIDTYPE In CentOS 7, manually set the

DNS is the abbreviation for the domain Name System. Everyone in the Internet input URL, is through the domain name resolution system to find the corresponding IP address to access the site. But the recent Microsoft Windows 2000 and Windows 2003 DNS services have a very high security vulnerabilities, if hackers successfully exploited, then our internet operation will encounter great trouble. Hacker Name: Zha

is: 1. Plug in the network cable and display Internet access in the network center. You can log on to the network through the campus network. 2. tcp settings automatically get the IP address and the IP address of the DNS server and the alternative DNS Server 3. query the network details to display the IP address. The

At present, the more authoritative public DNS server providers have the Opendns,google-Dns,norton DNS, what are the actual access speeds of these DNS servers? This is directly related to the speed of our Internet access, after all, the fast speed is the king. The author comp

1. Master Configuration named.conf Configure the DNS server, it is important to note that the named.conf file permissions and the owner of the named user aclinside{ 172.16.0.0/16;192.168.0.0/16; 127.0.0.0/8;};/ /acl must be at the top of the options{listen-onport53{ any;};//do not write this as Any,acl has made a strategy, here do not limit the directory "/var/named"; //space-related configuration director

Related packages: bind-9.3.6-2.p1.e15.i386.rpmcaching-nameserver-9.3.6-2.p1.e15.i386.rpmbind-utils-9.3.6-2p1.e15.i386.rpmbind-chroot- 9.3.6-2.p1.e15.i386.rpm Note: After enabling chroot, the BIND program's virtual directory is/var/named/chroot/,so the real path to/etc/named.conf is/var/named/chroot/etc/named.conf.the real path to/var/named is/var/named/chroot/var/namedDNS resource record type: A Host resource record that establishes the domain name to the IP address of the ma

This article describes how to use bind software to set up DNS on RedHat6.1. First, yumbind. Note that bind-chroot must be installed to minimize the impact on bind when other directories of the dns server change. Secondly, bind-utils includes dig and other important debugging tools. The main bind configuration file is/etc/named. conf. If you enable simple

One, understand the meaning of some nouns@----This symbol means that SOA is the same as a domainIn-----in is a domain name class that provides an IP address when used with a a,ptr or CNAME record, the domain name can be mapped to an IP address,Conversely, NS-----domain name or IP address of the zone DNS server specified by the domain name serverMX----MX records define what machine to send e-mail to a domain

Internet users with a certain technology base know what DNS is for, but most people are not sure how DNS looks for domain names. Ven found a picture that vividly describes the ripple effects of DNS lookups and may help people who do not know about DNS operations. The following image comes from VeriSign, in order to si

Some time ago, I changed the server to using ipfilter + ipnat + dhcp -- ipfilter + ipnat packet filtering, forwarding, and DHCP server architecture notes under freebsd5.4. However, I recently felt that the server is always offline, I opened another dns Cache service on the server