Hello i have bit of unexpected behaviour for a allow rule. i have 3 machines with known IP addresses and the rule of allow by IP works for 10.125.1.9 and 10 but not for 18. I tried a subnet rule see hashed out and still 10.125.1.18 could not access the expected resources.

Example code from nginx site file below.

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location ~ /resource/private {
#allow 10.125.1.0/24;
allow 10.125.1.18;
allow 10.125.1.9;
allow 10.125.1.10;
deny all;
}
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Can anyone shed light on what could be going wrong here please?

NGINX version is 1.18.0 on Ubuntu 20.04 latest updates.

Thanks

Paul