Как установить один IP адрес на два виртуальных сервера?

root@ppserver:/etc/nginx# cat nginx.conf
user www-data;
worker_processes  4;

error_log  /var/log/nginx/error.log;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    proxy_cache_path /var/lib/nginx/proxy levels=1:2 keys_zone=proxy_cache:64m max_size=128m inactive=3d;
    reset_timedout_connection on;
    client_header_timeout 15;
    client_body_timeout 15;
    send_timeout 5;
    keepalive_timeout        30 15;
    limit_conn_zone  $binary_remote_addr  zone=perip:5m;
    limit_conn perip 50;
    connection_pool_size 256;
    client_header_buffer_size 1k;
    large_client_header_buffers 4 2k;
    request_pool_size 4k;
    types_hash_max_size 2048;
    server_names_hash_bucket_size  64;
    access_log  /var/log/nginx/access.log;
    sendfile        on;
    tcp_nopush     on;
    tcp_nodelay        on;
    gzip              on;
    gzip_proxied      expired no-cache no-store private auth;
    gzip_buffers      16 8k;
    gzip_comp_level   5;
    gzip_http_version 1.0;
    gzip_min_length   0;
    gzip_vary         on;
    server_tokens off;
    output_buffers 1 32k;
    postpone_output 1460;
    ignore_invalid_headers on;
    client_max_body_size 64m;
    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

root@ppserver:/etc/nginx/sites-enabled# cat default
server {
        listen   *:80; ## listen for ipv4; this line is default and implied
        return 301 https://$host$request_uri;
}

server {

    listen 443;
    server_name blabla.ru;

    ssl_certificate           /etc/nginx/cert.crt;
    ssl_certificate_key       /etc/nginx/cert.key;

    ssl on;
    ssl_session_cache  builtin:1000  shared:SSL:10m;
    ssl_protocols  TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4;
    ssl_prefer_server_ciphers on;

    access_log /var/log/nginx/access.log;

        proxy_buffering on;
        limit_conn perip 32;

    location / {
        proxy_pass http://192.168.20.5/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_connect_timeout 120;
        proxy_send_timeout 120;
        proxy_read_timeout 180;
    }

    location /pve {
        proxy_pass https://192.168.20.100:8006/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_connect_timeout 120;
        proxy_send_timeout 120;
        proxy_read_timeout 180;
    }

    location /cam32 {
        proxy_pass http://10.1.1.239/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_connect_timeout 120;
        proxy_send_timeout 120;
        proxy_read_timeout 180;
    }
}