How to change the listen port?

[electricmessiah]

I'm using docker compose and have my port set to

    ports:
      - 9074:9000

Caddy keeps getting refused access to the port using

	php_fastcgi php-7.4-fpm:9074 {
		root /var/www/html
	}

I've also tried that didn't work

 ports:
      - 9074:9074

Is there something else I need to do? Is there an environment variable for the listen port?

[shinsenter]

    ports:
      - 9074:9000

↑
This setup maps container port 9000 to a port on the host machine.

If the Caddy container accesses the PHP-FPM container via the service name, try using port 9000 instead of 9074.

php_fastcgi php-7.4-fpm:9000 {
	root /var/www/html
}

Or if you want to use port 9074 in this case, you must use the host machine’s IP within the Docker network.

php_fastcgi <Host Machine IP>:9074 {
	root /var/www/html
}

[electricmessiah]

I need to run multiple versions of PHP for different websites being hosted in Caddy. In Docker, each of these PHP containers needs to have a different port. I have created both of the containers using specific ports ala 9074:9000, and I'm attempting to connect to them via Caddy using the servicename:port as below:

web1.com {
	php_fastcgi php-7.4-fpm:9074 {
		root /var/www/html
	}
}

web2.com {
	php_fastcgi php-8.5-fpm:9085 {
		root /var/www/html
	}
}

Here's the error Caddy reports. Connection refused:

level=error
ts=1766843617.8142424
logger=http.log.error.log0
msg=dialing backend: dial tcp 192.168.128.23:9074: connect: connection refused
request.remote_ip=192.168.1.12

So that's why I was curious if there's something additional to be done or a change to my current approach to get the container running PHP to accept the incoming connections on the ports I have set.