Regex - Only detect if all single digits in all four octets

Question

I am trying to capture IP addresses or version numbers via regex. Here are are my three conditions -

Condition1 :- Match if only single digits in all the four octets. E.g. - oids.serialNumber = '2.5.4.5';

Condition2 :- Don't match if more than 3 dots. E.g. - "System.Data.Entity": "4.0.0.1.0"; (4 dots here.)

Condition3 :- IP/Version number may or may not be in the middle of the string. E.g. - "System.Data.Entity": "4.0.0.1.0"; (middle of the string) E.g. - 1.0.0.0 - (start of the string)

I have created this regex - ([0-9]\.[0-9]\.[0-9]\.[0-9]) to capture the above but while running the test cases, i am not getting proper results.

Here are my test cases -

1.0.0.0 - Detect
"System.DirectoryServices": "11.0.0.0" - Don't Detect
"System.Web.Services": "244.0.0.0", - Don't Detect
"System.Security": "4.01.0.0",  - Don't Detect
"System.DirectoryServices.AccountManagement": "4.011.0.0",  - Don't Detect
"System.Data.Entity": "4.0.01.0", - Don't Detect
oids.street = '2.5.244.9'; - Don't Detect
oids.serialNumber = '2.5.4.5'; - Detect
oids.serialNumber = '2.5.4.11'; - Don't Detect
oids.serialNumber = '2.5.4.111';  - Don't Detect

Or `\A[0-9]\.[0-9]\.[0-9]\.[0-9]\z` (most, not JS and Python), or `\A[0-9]\.[0-9]\.[0-9]\.[0-9]\Z` (Python `re`). — Wiktor Stribiżew, Oct 22 '20 at 09:59
I tried this but its not passing all the test cases, especially third from the last. — striker00, Oct 22 '20 at 10:15
Use `(?<![0-9])(?<![0-9]\.)[0-9]\.[0-9]\.[0-9]\.[0-9](?!\.?[0-9])`, see [demo](https://regex101.com/r/B9KM8f/1/). — Wiktor Stribiżew, Oct 22 '20 at 10:39

Regex - Only detect if all single digits in all four octets

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