How to make multiple proxies with 1 ipv4
I’ve seen a couple proxy companies make multiple proxies from 1 ip by giving each proxy a unique port so like proxy 1 would be 192.29.291.92:1000 and proxy 2 would be 192.29.291.92:1001 and so on and so forth. would anyone have any idea how to do this? Are they just hosting multiple proxies from the same vps and using something other than squid? like apache?