- NSD from NLnet Labs
- Linux/Windows OS with NSD installed (in this example using Linux Ubuntu version 16.04 LTS)
- Functional DNS Server
Here is the process:
1. Login to your DNS server.
2. Launch the Terminal. If you don’t login as superuser, use the sudo command:
$ sudo –i
You will be prompted for your superuser password. Type the password and you will be on the root prompt.
3. Check your version of NSD. This is mandatory to determine which entry is applicable for your BIND version.
|Standard CAA Zone File for NSD version 4.0 and higher|
|example.com. CAA 0 issue "entrust.net"|
|Legacy CAA Zone File for NSD version lower than 4.0|
|example.com. TYPE257 \# 18 00056973737565656E74727573742E6E6574|
Root# nsd -v
4. Locate your DNS zone file by using the command below:
ls - l
This file by default is located under /etc/nsd/ , however the file may be hidden for security reasons. Please consult with your network administrator if you do not find the file in its default folder.
In this example, the DNS zone file is under /etc/nsd/ with the filename called entrustcertlab.com.zone:
WARNING ! Before you continue on the step below, please make sure you make a copy of your working DNS zone file to avoid any missteps.
Tip: To copy the file use the command cp
5. Edit the zone file using a line text editor tool such as nano or vi.
#root: nano /etc/nsd/entrustcertlab.com.zone
The DNS zone file will open:
6. Scroll to the bottom of your zone file and hit Enter to create a new line for your new record entry.
7. Copy/Paste or type the entry below to the empty line space:
yourdomain_name.IN CAA 0 issue "entrust.net"
Note: There are seven spaces between each of the first three character sets.
Also Note: To add a different Certification Authority as the Authorized CA, please add the entry related to that Certification Authority.
8. Press Ctrl-X to save the modification. Answer Yes and then hit Enter to overwrite the changes to your zone file.
9. Restart your DNS service by typing:
Root # service
NOTE: If you receive any errors during the DNS service restart process, go back to your zone file and make sure you don’t have any typos in your zone file. You can still refer back to your old working zone file that you backed-up in step 4.
9. To check the detail status of DNS service, type :
To check if the CAA record has been updated correctly and can be queried, use the command:
Root # dig entrustlab.com type257
The above shows a CAA Record for Entrust that has been successfully added. (See ANSWER section).
If you have any questions or concerns please contact the Entrust Certificate Services Support department for further assistance:
Hours of Operation:
Sunday 8:00 PM ET to Friday 8:00 PM ET
North America (toll free): 1-866-267-9297
Outside North America: 1-613-270-2680 (or see the list below)
NOTE: Smart Phone users may use 1-800 numbers for one-touch dialing.
Otherwise, it is very important that international callers dial the UITF format exactly as indicated. Do not dial an extra "1" before the "800" or your call will not be accepted as an UITF toll free call.
|Australia||0011 - 800-3687-7863|
|Austria||00 - 800-3687-7863|
|Belgium||00 - 800-3687-7863|
|Denmark||00 - 800-3687-7863|
|Finland||990 - 800-3687-7863 (Telecom Finland)|
00 - 800-3687-7863 (Finnet)
|France||00 - 800-3687-7863|
|Germany||00 - 800-3687-7863|
|Hong Kong||001 - 800-3687-7863 (Voice)|
002 - 800-3687-7863 (Fax)
|Ireland||00 - 800-3687-7863|
|Israel||014 - 800-3687-7863|
|Italy||00 - 800-3687-7863|
|Japan||001 - 800-3687-7863 (KDD)|
004 - 800-3687-7863 (ITJ)
0061 - 800-3687-7863 (IDC)
|Korea||001 - 800-3687-7863 (Korea Telecom)|
002 - 800-3687-7863 (Dacom)
|Malaysia||00 - 800-3687-7863|
|Netherlands||00 - 800-3687-7863|
|New Zealand||00 - 800-3687-7863|
|Norway||00 - 800-3687-7863|
|Singapore||001 - 800-3687-7863|
|Spain||00 - 800-3687-7863|
|Sweden||00 - 800-3687-7863 (Telia)|
00 - 800-3687-7863 (Tele2)
|Switzerland||00 - 800-3687-7863|
|Taiwan||00 - 800-3687-7863|
|United Kingdom||00 - 800-3687-7863|
0800 121 6078
+44 (0) 118 953 3088