http {
[...]
    #The configuration always includes the predefined "combined" format:
    #log_format   combined   '$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent"';
    log_format   combinedpe '$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"';
    log_format  vcombined   '$host $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent"';
    log_format  vcombinedpe '$host $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"';

    set_real_ip_from  10.41.0.58/32;
    real_ip_header    X-Forwarded-For;
    #real_ip_recursive off;
[...]
}

#
# cen06x64.xen.wbcd.pl
#
server {
    #limit_conn   myzone  10;
    listen       85;
    server_name  cen06x64.xen.wbcd.pl;
    #charset koi8-r;

    access_log  /var/log/nginx/cen06x64_xen_wbcd_pl.access.log  combinedpe;
    error_log  /var/log/nginx/cen06x64_xen_wbcd_pl.error.log  error;

    location / {
        root   /srv/nginx/vhosts/cen06x64.xen.wbcd.pl;
        index  index.html index.htm;
    }

    error_page  404              /404.html;
    location = /404.html {
        root   /srv/nginx/error;
    }

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /srv/nginx/error;
    }

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    location ~ /\.ht {
        deny  all;
    }
}