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Knowledge Base

How to create TLSA DNS record in Plesk and adjust DANE?

 
dnsdns statisticsdomainsextensionsgo

Question

How to create TLSA DNS record in Plesk and adjust DANE?

Answer

  1. Create example.com domain in Plesk.
  2. Issue a Let's Encrypt certificate for this domain.
  3. Log into the server via SSH.
  4. Install hash-slinger package with the command:

    # yum install hash-slinger

  5. Find name of the certificate file for example.com domain using a command below:

    # plesk db "select cert_file from certificates where name like '%example.com%'"
    +-----------+
    | cert_file |
    +-----------+
    | scfygh0Pw |
    +-----------+

  6. Switch to the /usr/local/psa/var/certificates/ directory:

    # cd /usr/local/psa/var/certificates/

  7. Using the name of the certificate file from the step №5 and the next command, generate TLSA record for mail.example.com on port 25:

    # tlsa --create --selector 1 -p25 --certificate scfygh0Pw mail.example.com

    The output was the following:

    _25._tcp.mail.example.com. IN TLSA 3 1 1 f8bda51d176a1d315eeec8a53c52febedf43319bf7c7ebbccafa9e14d9616541

  8. Go to Plesk > Domains > example.com > Hosting & DNS > DNS.
  9. Press the Add Record and using the values from the step №7, created a TLSA record for mail.example.com:
  10. After install Plesk DNSSEC extension by pressing Get It Free button in Plesk > Extensions > Extensions Catalog > Categories > DNS.
  11. Enable DNSSEC for example.com domain by pressing the Sign the DNS Zone button in Domains > example.com > Hosting & DNS > DNSSEC.

    Note: Algorithm was chosen as RSASHA256

 
To verify the results, open https://www.mailhardener.com/tools/dane-validator, specified mail.example.com an press the Inspect button
 
As the result it shows the configured TLSA DNS record and reported that DANE is properly configured for mail.example.com:

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