Что имеем:
1) Система SentOS
2) Панель управления ISP Lite
3) Связка apache + nginx
4) 2 IP адреса

Подскажите как правильно настроить nginx. При его запуске получаю ошибку

-bash-3.2# service nginx restart
the configuration file /etc/nginx/nginx.conf syntax is ok
configuration file /etc/nginx/nginx.conf test is successful
Stopping nginx:.                                           [  OK  ]
Starting nginx: [emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use
)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: bind() to 0.0.0.0:80 failed (98: Address already in use)
[emerg]: still could not bind()

Конфиг nginx:

user nginx;
worker_processes  10;
error_log  /var/log/nginx/error.log debug;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
     }
.....
     http {
     include       /etc/nginx/mime.types;
     default_type  application/octet-stream;
     log_format  main  '$remote_addr - $remote_user [$time_local] $status '
                 '"$request" $body_bytes_sent "$http_referer" '
                          '"$http_user_agent" "http_x_forwarded_for"';
                          access_log  /var/log/nginx/access.log  main;
                          sendfile       on;
                          tcp_nopush     on;
                          tcp_nodelay    on;
                          keepalive_timeout  30;
                          send_timeout       900;
                          server_tokens      off;
                          server {
                          listen 80;
                          server_name     _;
                          server_name_in_redirect  off;
                          access_log  /var/log/nginx/host.access.log  main;
                          location / {
                          proxy_pass         http://127.0.0.1:8080/;
                          proxy_redirect     off;
                          proxy_set_header   Host             $host;
                          proxy_set_header   X-Real-IP        $remote_addr;
                          proxy_set_header   X-Forwarded-For  $proxy_add_x_forwa
                          client_max_body_size       10m;
                          client_body_buffer_size    128k;
                          proxy_connect_timeout      90;
                          proxy_send_timeout         90;
                          proxy_read_timeout         90;
                          proxy_buffer_size          4k;
                          proxy_buffers              4 32k;
                          proxy_busy_buffers_size    64k;
                          proxy_temp_file_write_size 10m;
                          }
                          }
                          }
http {
<------>server {
#<-----><------>listen 89.243.280.131:80;
<------><------>server_name greenet.ru www.greenet.ru;
<------><------>rewrite ^(/manager/.*)$>https://$host$1>permanent;
<------><------>location ~* ^/(webstat/|awstats|webmail/|myadmin/|manimg/) {
<------><------><------>proxy_pass http://89.243.280.131:8080;
<------><------><------>proxy_redirect http://greenet.ru:8080/ /;
<------><------><------>proxy_set_header Host $host;
<------><------><------>proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_
<------><------><------>proxy_set_header X-Real-IP $remote_addr;
<------><------>}
<------><------>location / {
<------><------><------>proxy_pass http://89.243.280.131:8080;
<------><------><------>proxy_redirect http://greenet.ru:8080/ /;
<------><------><------>proxy_set_header Host $host;
<------><------><------>proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_
<------><------><------>proxy_set_header X-Real-IP $remote_addr;
<------><------>}
<------><------>location ~* ^.+\.(jpg|jpeg|gif|png|svg|js|css|mp3|ogg|mpe?g|avi|
<------><------><------>root /var/www/val/data/www/greenet.ru;
<------><------><------>access_log /var/www/httpd-logs/greenet.ru.access.log;
<------><------><------>error_page 404 = @fallback;
<------><------>}
<------><------>location @fallback {
<------><------><------>proxy_pass http://89.243.280.131:8080;
<------><------><------>proxy_set_header Host $host;
<------><------><------>proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_
<------><------><------>proxy_set_header X-Real-IP $remote_addr;
<------><------>}
<------>}
}

Конфиг httpd думаю целиком выкладывать не стоит, по этому кусоек

LoadModule rpaf_module modules/mod_rpaf-2.0.so

RPAFenable On
RPAFsethostname Off
RPAFproxy_ips 127.0.0.1 89.243.280.131
RPAFheader X-Real-IP

...

# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, in addition to the default. See also the <VirtualHost>
# directive.
#
# Change this to Listen on specific IP addresses as shown below to.
# prevent Apache from glomming onto all bound IP addresses (0.0.0.0)
#
#Listen 12.34.56.78:80
Listen 127.0.0.1:8080

Знающие люди подсказали:

В /etc/nginx/nginx.conf у Вас на 24-й строке есть запись:
listen       80;
а на 49-й строке:
listen 89.243.280.131:80;

В результате получается, что nginx первой записью занимает 0.0.0.0:80
т.е. "всё-всё на порту 80", а второй пытается занять 89.243.280.131:80

Вам нужно устранить этот конфликт и тогда nginx заработает.

Подскажите в чем тут ошибка?