[Release-1.33] Add firewall section to check-config.sh

[dereknola]

Proposed Changes

Backport of #13234

Types of Changes

Verification

Testing

Linked Issues

User-Facing Change

Further Comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 21.07%. Comparing base (0b396d3) to head (458cf30).
⚠️ Report is 1 commits behind head on release-1.33.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.33   #13392      +/-   ##
================================================
- Coverage         21.22%   21.07%   -0.16%     
================================================
  Files               188      188              
  Lines             15545    15545              
================================================
- Hits               3300     3276      -24     
- Misses            11792    11823      +31     
+ Partials            453      446       -7     

Flag	Coverage Δ
unittests	21.07% <ø> (-0.16%)	⬇️

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