> We have a server (real name substituted by mapserver.example.com) running > nginx 1.18.0 on CentOS 7 with php-fpm listening on port 9001.
Does the fpm listen also on ipv6 interface? Check: ss -ntlr | grep 9001 If you see [::]:9001 Since you have fastcgi_pass localhost:9001; I assume at some points the localhost resolves to an ipv6 > one with an IPv6 client and one with an IPv4 client): All your logs show ipv6 clients only - 2a02:587:da23:700:[last_4_parts_removed], and ::ffff:193.140.[last_2_octets_removed] are both ipv6 ips (the second is so called ipv4-mapped ipv6 address) Either make fpm listen to all interfaces or change the nginx config to: fastcgi_pass 127.0.0.1:9001; Or even better is to use unix sockets so you can avoid the tcp stack between nginx and php-fpm at all. rr _______________________________________________ nginx mailing list nginx@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx