Connection refused only when not using wildcard * at bind

Hi. I try to make L7 Load balancer using HA, behind L4 HW Load balancer.
my NIC eth0 ip is 10.241.30.128. Therefore I try to bind the ip to frontend

frontend  main
    bind 10.241.30.128:12333
    mode http
    default_backend app

When I access to the HW L4 load balancer(10.128.177.195:12333 is connected to HA) by using curl, it shows curl: (7) Failed to connect to 10.128.177.195 port 12333: Connection refused
But when I access to the HA directly, it works well.
For test, I changed bind ip to asterisk.

frontend  main
    bind *:12333
    mode http
    default_backend app

It works well when I access to the HW L4 load balancer.
Could you give me little help, for understanding this happen?

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