nginx, gitlab, subdomain

I have installed gitlab on an ubuntu ( 12.04 ) virtual machine in virtual box, on my NAS (on Windows 7)

The hostname of this machine is vubuntu. My router ( tomato v1.28 ) is configured to use the .lan domain.

On my workstation, I can ping the virtual machine successfully, using the address vubuntu.lan

The config file of gitlab in nginx is the same as given in the installation document, except I changed the listen and server_name parameters:

# Maintainer: @randx
# App Version: 4.0

upstream gitlab {
  server unix:/home/gitlab/gitlab/tmp/sockets/gitlab.socket;
}

server {
  listen 192.168.0.5:80;         # e.g., listen 192.168.1.1:80;
  server_name gitlab.vubuntu;     # e.g., server_name source.example.com;
  root /home/gitlab/gitlab/public;

  # individual nginx logs for this gitlab vhost
  access_log  /var/log/nginx/gitlab_access.log;
  error_log   /var/log/nginx/gitlab_error.log;

  location / {
    # serve static files from defined root folder;.
    # @gitlab is a named location for the upstream fallback, see below
    try_files $uri $uri/index.html $uri.html @gitlab;
  }

  # if a file, which is not found in the root folder is requested,
  # then the proxy pass the request to the upsteam (gitlab unicorn)
  location @gitlab {
    proxy_read_timeout 300; # https://github.com/gitlabhq/gitlabhq/issues/694
    proxy_connect_timeout 300; # https://github.com/gitlabhq/gitlabhq/issues/694
    proxy_redirect     off;

    proxy_set_header   X-Forwarded-Proto $scheme;
    proxy_set_header   Host              $http_host;
    proxy_set_header   X-Real-IP         $remote_addr;

    proxy_pass http://gitlab;
  }
}

The problem is that when I access http://gitlab.vubuntu.lan/ in my browser, it says it cannot find the page.

But if I access http://vubuntu.lan/, I have the gitlab page.

How can I access gitlab only using the subdomain?

Thanks!