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Wrong mask for 0.0.0.0? #353

@dalibor-aleksic-atomia

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@dalibor-aleksic-atomia

It seems that 0.0.0.0/0 should be used instead 0.0.0.0/32.

ip_mask_deny_postgres_user => '0.0.0.0/32',

Mask /0 matches all IP address and therefore block access to postgres user from remote hosts.
Mask /32 matches only very first IP address 0.0.0.0 based on this answer https://networkengineering.stackexchange.com/a/56411

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