haproxy tcp acl example

RTFM: https://www.haproxy.com/blog/use-haproxy-response-policies-to-stop-threats/#reject

frontend xxx_ft
        bind 10.0.0.10:29000
        mode tcp
        acl whitelist src 10.0.0.0/24
        tcp-request connection reject if !whitelist
        use_backend xxx_bk

backend xxx_bk
        mode tcp
        server ctcmedia 10.0.0.20:9000