server: update default value of setting 'expose.dns.externally' to 'false"

[weizhouapache]

Description

This PR fixes the issue that the DNS is exposed publicly by default.

related to:
6a72e6e
#1663

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• build/CI

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 13.16%. Comparing base (d487a1c) to head (47163bc).
Report is 1 commits behind head on 4.18.

Additional details and impacted files

@@            Coverage Diff            @@
##               4.18    #8776   +/-   ##
=========================================
  Coverage     13.16%   13.16%           
  Complexity     9205     9205           
=========================================
  Files          2724     2724           
  Lines        258149   258149           
  Branches      40235    40235           
=========================================
  Hits          33987    33987           
  Misses       219856   219856           
  Partials       4306     4306           

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[weizhouapache]

@blueorangutan package

[blueorangutan]

@weizhouapache a [SL] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result [SF]: ✔️ el7 ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 8914

[weizhouapache]

@blueorangutan test

[blueorangutan]

@weizhouapache a [SL] Trillian-Jenkins test job (centos7 mgmt + kvm-centos7) has been kicked to run smoke tests

[weizhouapache]

this is a critical issue
@rohityadavcloud @NuxRo @DaanHoogland @JoaoJandre

[blueorangutan]

[SF] Trillian test result (tid-9447)
Environment: kvm-centos7 (x2), Advanced Networking with Mgmt server 7
Total time taken: 42419 seconds
Marvin logs: https://github.com/blueorangutan/acs-prs/releases/download/trillian/pr8776-t9447-kvm-centos7.zip
Smoke tests completed. 110 look OK, 0 have errors, 0 did not run
Only failed and skipped tests results shown below:

Test	Result	Time (s)	Test File

[NuxRo]

LGTM

[JoaoJandre]

CLGTM

[JoaoJandre]

Merging based on approvals and CI result