How to setup multiple ports on Squid proxy?

I have installed Squid Proxy in my Ubuntu 20.04 VPS and I want to use it by multiple ports so I have added ports like this is conf file

http_port 1000
http_port 1001
http_port 1002
http_port 1003
http_port 1004

Click to expand...

But now problem is only 127 (1000-1127) port is working, no matter what port number I use, always first 127 ports only working, how can I make working maximum number ports? I heard we can add 4096 ports.

As far as I remember some older version of Squid had limit of 128 simultaneous connections. That should be resolved in newer version, but please check squid config and doc to confirm it.