1stream {
 2    upstream ingress443 {
 3        server 192.168.4.150:443;
 4    }
 5
 6    upstream ingress80 {
 7        server 192.168.4.150:80;
 8    }
 9
10    upstream irc {
11        server 192.168.4.151:6666;
12    }
13    server {
14        listen 443;
15        proxy_pass ingress443;
16        proxy_next_upstream on;
17    }
18    server {
19        listen 80;
20        proxy_pass ingress80;
21        proxy_next_upstream on;
22    }
23    server {
24        listen 6666;
25        proxy_pass irc;
26        proxy_next_upstream on;
27    }
28}