nginx-proxy/test/test_internal/network_internal.conf

# Only allow traffic from internal clients
allow 127.0.0.0/8;
allow 10.0.0.0/8;
allow 192.168.0.0/16;
allow 172.16.0.0/12;
allow fc00::/7; # IPv6 local address range
deny all;

# Dummy header for testing
add_header X-network internal;