DNS¶
About this menu¶
Menu Features¶
Features of this menu are as follows.
** 1. Easily create, edit and delete record sets in zones and zones as DNS services **
** 2. It is possible to build a highly available Web system **
** 3. Provide OpenStack compatible to API **
Overview of DNS service image
Note
If you need to change the location by switching DNS records in the case of failure at the site (region) failure in disasters, please refer to `Global Server Load Balance <https://ecl.ntt.com/en/documents/service-descriptions/rsts/gslb/gslb.html> `_ Please use. This menu provides redundancy by the name server of multiple bases (It is not suitable for switching by real-time record update in disaster etc)
Description of Respective Menus¶
DNS Menu¶
In this menu, we will provide an external content server (authoritative DNS server).
You can create, edit, delete zones, create, edit, and delete record sets contained within them.
Both forward and reverse settings are possible for record sets.
Supports wildcard entries.
The record set that can be set up and the corresponding forward and reverse type are as follows.
Recordset |
Descriptions |
|
---|---|---|
Forward |
A record |
Bind the host name to the IPv4 address. |
AAAA record |
Bind the host name to the IPv6 address. |
|
CNAME record |
Set a different host name for the host name. |
|
MX record |
Set up the mail server. The lower the priority value, the higher the priority. |
|
NS record |
Specify the DNS server name of the domain. |
|
TXT Record |
Set the text information related to host and domain. |
|
SRV Record |
Specify the location of the service for the domain name. |
|
SPF Record |
It manages the list of IP addresses of authorized servers that can send mail. |
|
SOA Record |
Set zone (domain) information. |
|
Reverse |
PTR Record |
Bind the IP address to the host name. |
In this menu, 4 redundant name servers are set as a name server group, and when you create a zone, the created zone is assigned to one name server group. Recordsets created in the zone are automatically registered in the four name servers in the name server group assigned to the zone.
The name server information of this menu is as follows.
Name server group |
Host Name |
Region |
---|---|---|
Name server group 1 |
dns101-1.jp1.ecl.ntt.com. | JP1 |
dns101-2.uk1.ecl.ntt.com. | UK1 | |
dns101-3.us1.ecl.ntt.com. | US1 | |
dns101-4.sg1.ecl.ntt.com. | SG1 | |
Name Server Group 2 |
dns102-1.jp1.ecl.ntt.com. | JP1 |
dns102-2.uk1.ecl.ntt.com. | UK1 | |
dns102-3.us1.ecl.ntt.com. | US1 | |
dns102-4.sg1.ecl.ntt.com. | SG1 | |
Name Server Group 3 |
dns103-1.jp1.ecl.ntt.com. | JP1 |
dns103-2.uk1.ecl.ntt.com. | UK1 | |
dns103-3.us1.ecl.ntt.com. | US1 | |
dns103-4.sg1.ecl.ntt.com. | SG1 |
Note
Full service resolver (cache server) function is not provided. Customers are advised to prepare DNS resolvers.
Domain acquisition is not done, so we ask that you prepare the domain separately.
This menu provides external DNS service. DNS for internal use is not provided.
Zone transfer is not supported.
Available Functions¶
Zone¶
Setting items when the zone is created¶
Please set the following items when creating a zone. After setting various items, pressing the “Create” button creates the zone.
Setting item List when the zone is created
Items |
Settings |
Details |
Action |
---|---|---|---|
Create Zone |
Domain | Enter the domain name to be set as the zone. Up to 128 characters can be entered.
*If you create the same zone as the already set zone (including other tenants and other contracts)
A name server group containing zones that have already been set up
(in other words, the name server group to which the zone belongs)
A different name server group is assigned to that zone.
※ The maximum number of registrations in the same zone is 3.
|
Customer Portal / API |
Description | It is possible to enter arbitrary comments in the zone to be set.
Up to 255 characters can be input (Japanese is also possible)
|
Customer Portal / API |
Items that can be operated in the zone¶
Items that can be operated in the zone are as follows.
** Zone operable item list **
Item |
Overview |
Action |
---|---|---|
Create Zone |
The zone is created and registered. |
Customer Portal / API |
Change Description |
Change the description registered in the zone. |
Customer Portal / API |
Delete Zone |
Customer Portal / API |
Recordset¶
Setting items when creating a record set¶
Note
** Setting item list when creating a record set **
Items |
Settings |
Details |
Action |
---|---|---|---|
Create record set |
Name | Enter the domain name to be registered in the resource record with FQDN.
You can enter up to 254 characters for the entire FQDN.
※ Only single-byte alphanumeric characters can be entered. Japanese input is not possible.
|
Customer Portal / API |
Type |
|
Customer Portal / API |
|
TTL (Seconds) | Set the cache retention time (TTL). It is possible to set an integer value in seconds (0 to 86400).
You can also select from 1m (1 minute), 5m (5 minutes), 1h (1 hour), 1d (1 day).
|
Customer Portal / API |
|
Value | Please enter a value corresponding to the specified Type.
(Example) When “A - IPv4 address” is selected for Type, enter “192.0.2.235”.
|
Customer Portal / API |
|
Description | It is possible to enter arbitrary comments in the record set to be set.
You can enter up to 255 characters.
|
API |
Items that can be operated on record set¶
Items that can be operated with record set are as follows.
** Setting item list when creating a record set **
Item |
Overview |
Action |
---|---|---|
Create record set |
Create a record set in the target zone and register it. |
Customer Portal / API |
Edit record set |
|
Customer Portal / API |
Delete record set |
The registered record set will be deleted.
※ Please be careful because the deleted record set can not be restored or referred.
|
Customer Portal / API |
Menu Plan¶
List of Menu¶
The menu provided in the DNS menu is as follows.
** Menu List of the DNS menu**
Menu |
Provided functions |
---|---|
DNS | Zone |
Recordset |
Subscription Methods¶
Application for using the DNS menu itself is unnecessary. After creating a tenant, you can use it by creating zones and record sets.
Charges will be made according to the created records.
Terms And Conditions¶
Conditions of Usage with Other Menus¶
** Example of combination with other menu **
Menu |
Use Case for Combination with Virtual Server Menu |
---|---|
By linking the address set for the bare metal server with the host name of the customer domain, It is possible to create an Internet public web server that can be accessed by the host name of the customer domain. |
|
By linking the address set for the virtual server with the host name of the customer domain, It is possible to create an Internet public web server that can be accessed by the host name of the customer domain. |
|
By linking the host name of the load balancer and the host name of the customer domain and placing multiple resources under the load balancer, It is possible to build an Internet public Web server that can be accessed by the load balancer loading host name of the customer domain. |
Precautions before use¶
Support Coverage¶
This menu provides support with following coverage:
Inquiries about operation screens provided by DNS, API usage and specifications
Functions provided in DNS, operation screen, API breakdown, bug
Notes¶
Since the DNS server provided in this menu is published on the Internet and shared by multiple customers, the DNS zone information created by the customer may be visible from a third party. The result of retrieving information not included in the zone created by the customer is undefined.
Since it is not a domain registrar service, there is no domain name registration function. In order to make the DNS zone created in this menu available from the whole Internet, it is necessary to register the corresponding domain name separately in the domain registrar service and register the DNS server name provided in this menu as name server information.
Name server information is provided in host name. Actual IP address may change. Always use the host name when designating a name server.
- If the customer’s data saved in this menu is lost, damaged or leaked, or is used for purposes other than the original purpose due to loss, damage, leakage or other reasons,As a result, we will not assume any responsibility for any direct or indirect damage caused to customers or third parties regardless of the cause.
We may suspend and delete customers’ use services if we determine that customer’s settings based on this menu are malicious or to have a negative impact on NTT Com and third parties.
NTT Com will terminate Customers’ stored data located in this Service Menu in the event that Customers terminate the contract they signed with NTT Com.
NTT Com reserves a right to terminate or erase the Customers’ subscription of this menu in the event that NTT Com determines or has the suspicion that Customers breach any Terms and Conditions of this menu or any other policies.
This menu is a service that multiple name servers are shared by multiple customers. There is a possibility to take measures such as limiting the use of customers when there is a high possibility that the query for the record of a specific host is remarkably high and the operation of the service and the use of other customers may be affected.
- This menu provides following support:
Infrastructure of this menu is monitored 24/7.
Maintenance and troubleshooting are provided based on the details on Support menu described in other documents.
- Other qualities of operation will correspond to the degree of such where NTT Com defines as its standard operation and terms of service for Enterprise cloud 2.0.`Enterprise Cloud 2.0 Service Manual Support<https://ecl.ntt.com/documents/service-descriptions/support/> `_
- In this menu, the following conditions will be broken down and will be notified to customers according to the method specified separately.
- When all name servers in the name server group containing the target zone setting do not respond to the request(Except when some name server in the name server group responds)
Portal / API: Failure affecting customers (inoperability etc.)
- Following events are not regarded as failures:
Inoperable difficulty due to Network (or Internet) misuse or mishaps
Quality Deterioration.
Restrictions¶
On the relationship between DNS menu and tenant¶
Note
Zone restrictions¶
There are the following constraints in the zone setting.
** Zone restrictions **
Items |
Restrictions |
Details |
---|---|---|
Domain name of the zone |
Up to 3 same zones can be registered |
As long as there are unconfigured name server groups, up to 3 same zones can be registered.
(Supplement) About name server group when registering same zone
If you set a zone that has already been set up (including other tenants and other contracts), the applicable zone of the already set zone
A name server group different from the name server group is assigned to that zone.
|
Note
Restrictions on Record set¶
There are the following constraints on setting of record set.
** Record set constraint **
Items |
Restrictions |
Details |
---|---|---|
Reverse setting |
Only global IP addresses used within the same contract can be set |
The reverse lookup setting for the global IP address of this service can be set only for the global IP address used within the same contract.
Reverse setting can not be set for the global IP address or unused global IP address used in another contract.
There is a time when it is not possible to reverse the setting for up to 30 minutes immediately after adding the global IP address in the tenant.
*If you cancel (return) the global IP address you are setting up reverse lookup, the reverse response for the global IP address will be reset to the default value.
However, the reverse lookup setting itself is not automatically deleted, so delete the reverse lookup setting if it is not necessary.
(If the zone concerning the reverse drawing setting remains, the charge of the zone will continue to occur, so please be careful)
(Reference) Reverse setting regarding the global IP address of this service can be set only in this menu. (It can not be set with other DNS service)
|
Note
(Reference) Settings related to the IP address used outside this service
- For forward lookup settings, you can also set global IP addresses used outside of this service.
- For the reverse lookup setting, you can also set the global IP address used outside this service, but it is necessary to delegate authority from the provider of the global IP address to the name server of this menu.For authority delegation please contact the provider of the global IP address.
Uppermost Maximum Capacity for Utilization¶
In this menu, the maximum number of usage is set as follows.
** Maximum number of DNS menus available **
Items |
Restrictions |
Details |
|
---|---|---|---|
Zone |
Number of zones |
100 Zones |
The maximum number of zones that can be set in 1 tenant’s DNS menu is 100 zones. |
Recordset |
Number of Record Sets |
10,000 records |
The maximum number of recordsets that can be set in one zone is 10,000 records. |
Pricing¶
Monthly Fee¶
In the DNS menu, we calculate the monthly fee according to the number of zones used as follows.
Items |
Details |
---|---|
Number of zones |
Monthly fee will be applied in 5 zone units for the zone used for the current month. |
SLA of the DNS Menu¶
SLA¶
The SLA of this menu conforms to the SLA standard defined for this service. For details, refer to the following page.
Enterprise Cloud 2.0 Service Description: SLA
Warning
In the DNS menu, the case where all name servers in the name server group of the target zone did not respond to the request is defined as the failure time.
Please be careful, in the following cases it is not included in the failure time.
When there is a response from a partial name server in the name server group
Reduce response capability of name server
Failure to create, edit, or delete zones or record sets
Failure of Customer Portal/API.
Note