I. Noun explanation: Domain name analysis A Record MX record CNAME record TTL 1, what is domain name resolution? Domain name analysis is the conversion process of the IP address after the international domain name or domestic domain name and the Chinese domain name and other domain name applications. The IP address is a digital address identified on the Internet. For the sake of simplicity, use the domain name instead of the IP address identification site address. The resolution of the domain name is done by the DNS server.
2, what is a record? A (address) Record is used to specify the IP address record corresponding to the host name (or domain name). Users can point to the website server under this domain to their own Web Server. You can also set the secondary domain name of your domain name.
3, what is MX record? Mail routing records, users can point the mail server under this domain to their Mail Server, and then manipulate all mailbox settings. You only need to fill in the IP address of your server online, you can transfer all your domain names to your own settings on the appropriate mail server.
4, what is CNAME record? That is: an alias record. This record allows you to map multiple names to the same computer. It is usually used to provide a computer that provides both WWW and MAIL services. For example, there is a computer name "host.mydomain.com" (a record). It offers WWW and MAIL services, in order to facilitate user access services. Two alias (CNAME) can be set for the computer: WWW and MAIL. These two aliases are full of http://www.mydomain.com/ and "mail.mydomain.com". In fact, they all point to "Host.Mydomain.com".
5, what is a TTL value? The TTL value is "Time to Live", which means that it indicates that DNS is recorded in the DNS server. To understand the TTL value, first look at the following example: Suppose, there is such a domain name myhost.abc.com (in fact, this is a DNS record, usually in the ABC.COM domain has a host) corresponding to a host) correspondence The IP address is 1.1.1.1, and its TTL is 10 minutes. This domain name or this record is stored on a DNS server named DNS.Abc.com.
Second, there is now a user typed in the browser (also known as URL): http://myhost.abc.com/ What happens?
The visitor designated DNS server (or his ISP, Internet service provider, dynamic assignment to him) 8.8.8.8 will try to explain myhost.abc.com, of course 8.8.8.8 This DNS server is not included MyHost.abc.com This information has not been analyzed immediately, but after the recursive query of the global DNS, it will eventually be positioned to DNS.Abc.com This DNS server, DNS.abc.com This DNS server will Myhost.ABC. COM corresponding IP address
1.1.1.1 Tell 8.8.8.8 This DNS server, then tells the user results by 8.8.8.8. 8.8.8.8 In order to speed up the resolution of this record on myhost.abc.com, it will be reserved for a while, this is TTL time, and if the user has myhost.abc.com during this time. The resolution request of this record, it tells the user directly 1.1.1.1, when
TTL expires the above process again.
Third, why didn't I do the resolution? Each of the following reasons may result in your resolution that cannot take effect. 1. DNS of the domain name does not set the correct DNS as required. To make your resolution setting, the DNS of the domain name must be ns1.dns-diy.com & ns2.dns-diy.com, or other other points to these two DNS DNS. 2, the domain name has not set the corresponding resolution record. IV how to check if the DNS of the domain name is set to a valid DNS server? You can check if the DNS is set correctly on the right area of the action platform page of the domain name management area. If you want to modify the DNS of the domain name to the registrar's domain management interface operation.
Five, have been modified in the registrar, why is DNS check or old DNS? Our DNS check is based on the current data of the root server of the DNS. In the registrar modified DNS, it may take 12-72 hours to reflect on the root server. Did the domain name resolution can take effect, and it is based on our DNS check.
Sixth, the resolution can take effect, why not receive mail?
Please check if your MX record is set correctly; check if your post office server is set correctly. If you don't have your own mail server, you can use our email forwarding.
Seven, set MX records, why is it invalid? Most SMTP requires MX record points to a host name. So specify the MX record to a host name instead of an IP address. For example, let 218.5.1.249 as the mail server for whatis.cn can set it like this,
1. Poll the mail.Whatis.cn to 218.5.1.249 ("Host Name" field filled "Mail", "Type" selection "A", "IP address / hostname" column filled "218.5.1.249",
After pressing "Added") 2, the MX record of Whatis.cn is set to mail ("Host Name" column is empty, "Type" Select "MX", "IP Address / Host Name" section filled "Mail", then press "Add") 3, set on 218.5.1.249, allowing mail to receive @ Whatis.cn
If you fill in "Mail" in the "Host Name" field in the second step in the second step, it means that the message sent to @mail.whatis.cn is received by 218.5.1.249, which may not meet your original meaning.
Eight, why is there a host name? "End, and some? Is this different? The host name ended in "." Means the full name of the host name (FQDN); instead of "." The host name ending is indicated in the domain name under this domain. Example: 1. Add a CNAME type of record "ABC" to "123" in the whereis.cn domain, then abc.Whatis.cn represents the parsing of 123.Whatis.cn. 2. Add a CNAME type record "ABC" to "Onlinenic.com.", Abc.Whatis.cn indicates the resolution of OnlineEnic.com, "ONLINENIC.COM.".
Nine, why "priority" setting always is "0"? "Priority" is only valid for MX records, and other types of records will ignore priority.
Ten, can you do panic? can. Please fill in "*" in the Host Name column.
11. Different, DNS modifications and domain name parsing? DNS modification and domain name resolution The meaning is completely different: 1, DNS modification refers to the modification of domain name resolution servers (DOMAIN Name System). If you have a stand-alone DNS server, you want to resolve the domain name of your registration through this DNS, you can choose DNS to modify the business (Note: To change the DNS domain name must be registered in our company or successfully transferred to our company) . Please log in to the domain name management area - Click the corresponding domain name -DNS modification to modify your domain name DNS information 2, the domain name resolution: between the domain name and the IP address, the conversion work between them is called domain name resolution, domain name analysis Need to be done by a dedicated domain name resolution server (DNS). If your host and domain name are successful, you need to make a resolution. If your domain name DNS is the first host's default DNS, please log in to the domain name management area - Click the corresponding domain name - Domain name resolution to modify your domain name analysis. If your domain name DNS is not the first host resolution server, please contact the DNS in contact with the resolution. Twelve, English domain name modify whether DNS charges? International English domain name, domestic English domain name can modify DNS, this service is free. Thirteen, URL forwarding hidden path and does not hide the path? Does not hide the path URL forwarding:, for example: http: //b.com/ pointing http://a.com/xxx/ (any directory); in the browser In the address bar, you are http://b.com/ Connection, the address bar will display the true address http://a.com/xxx/ hidden path URL forwarding: for example: http: //b.com/ point to http : //a.com/xxx/ (arbitrary directory); in the browser address bar to http://b.com/ Connect the address bar displayed or http://b.com/, but actually pointing It is http://a.com/xxx/ content.
