Hello. I'm trying to add a subdomain "dev" to my site which is running on Ubuntu 12.04x64
I had spent a few days to do this, but without any result. Only "This webpage is not available." error.

Here is a zone file showed in https://cloud.digitalocean.com/domains/ubium.ru

$ORIGIN ubium.ru.
$TTL 1800
ubium.ru. IN SOA ns1.digitalocean.com. hostmaster.ubium.ru. 1424702134 10800 3600 604800 1800
ubium.ru. 1800 IN NS ns1.digitalocean.com.
ubium.ru. 1800 IN NS ns2.digitalocean.com.
ubium.ru. 1800 IN NS ns3.digitalocean.com.
ubium.ru. 1800 IN A 188.166.63.44
dev.ubium.ru. 1800 IN A 188.166.63.44
*.dev.ubium.ru. 1800 IN CNAME dev.ubium.ru.
*.ubium.ru. 1800 IN CNAME ubium.ru.

Here is apache2.conf

<VirtualHost 188.226.173.208:8080>

    ServerName ubium.ru
    ServerAlias www.ubium.ru
    ServerAdmin info@ubium.ru
    DocumentRoot /home/ubium/web/ubium.ru/public_html
    ScriptAlias /cgi-bin/ /home/ubium/web/ubium.ru/cgi-bin/
    Alias /vstats/ /home/ubium/web/ubium.ru/stats/
    Alias /error/ /home/ubium/web/ubium.ru/document_errors/
    #SuexecUserGroup ubium ubium
    CustomLog /var/log/apache2/domains/ubium.ru.bytes bytes
    CustomLog /var/log/apache2/domains/ubium.ru.log combined
    ErrorLog /var/log/apache2/domains/ubium.ru.error.log
    <Directory /home/ubium/web/ubium.ru/public_html>
        AllowOverride All
        Options +Includes -Indexes +ExecCGI
    </Directory>
    <Directory /home/ubium/web/ubium.ru/stats>
        AllowOverride All
    </Directory>

    <IfModule mod_ruid2.c>
        RMode config
        RUidGid ubium ubium
        RGroups www-data
    </IfModule>
    <IfModule itk.c>
        AssignUserID ubium ubium
    </IfModule>

    Include /home/ubium/conf/web/apache2.ubium.ru.conf*

</VirtualHost>


<VirtualHost 188.226.173.208:8080>

    ServerName dev.ubium.ru
    ServerAlias www.dev.ubium.ru
    ServerAdmin info@ubium.ru
    DocumentRoot /home/ubium/web/ubium.ru/public_html
    ScriptAlias /cgi-bin/ /home/ubium/web/ubium.ru/cgi-bin/
    Alias /vstats/ /home/ubium/web/ubium.ru/stats/
    Alias /error/ /home/ubium/web/ubium.ru/document_errors/
    #SuexecUserGroup ubium ubium
    CustomLog /var/log/apache2/domains/ubium.ru.bytes bytes
    CustomLog /var/log/apache2/domains/ubium.ru.log combined
    ErrorLog /var/log/apache2/domains/ubium.ru.error.log
    <Directory /home/ubium/web/ubium.ru/public_html>
        AllowOverride All
        Options +Includes -Indexes +ExecCGI
    </Directory>
    <Directory /home/ubium/web/ubium.ru/stats>
        AllowOverride All
    </Directory>

    <IfModule mod_ruid2.c>
        RMode config
        RUidGid ubium ubium
        RGroups www-data
    </IfModule>
    <IfModule itk.c>
        AssignUserID ubium ubium
    </IfModule>

    Include /home/ubium/conf/web/apache2.ubium.ru.conf*

</VirtualHost>

<VirtualHost 188.166.63.44:8080>

    ServerName dev.ubium.ru
    ServerAlias www.dev.ubium.ru
    ServerAdmin info@ubium.ru
    DocumentRoot /home/ubium/web/ubium.ru/public_html
    ScriptAlias /cgi-bin/ /home/ubium/web/ubium.ru/cgi-bin/
    Alias /vstats/ /home/ubium/web/ubium.ru/stats/
    Alias /error/ /home/ubium/web/ubium.ru/document_errors/
    #SuexecUserGroup ubium ubium
    CustomLog /var/log/apache2/domains/ubium.ru.bytes bytes
    CustomLog /var/log/apache2/domains/ubium.ru.log combined
    ErrorLog /var/log/apache2/domains/ubium.ru.error.log
    <Directory /home/ubium/web/ubium.ru/public_html>
        AllowOverride All
        Options +Includes -Indexes +ExecCGI
    </Directory>
    <Directory /home/ubium/web/ubium.ru/stats>
        AllowOverride All
    </Directory>

    <IfModule mod_ruid2.c>
        RMode config
        RUidGid ubium ubium
        RGroups www-data
    </IfModule>
    <IfModule itk.c>
        AssignUserID ubium ubium
    </IfModule>

    Include /home/ubium/conf/web/apache2.ubium.ru.conf*

</VirtualHost>

And here is hginx.conf

server {
    listen      188.226.173.208:80;
    server_name ubium.ru www.ubium.ru;
    error_log  /var/log/apache2/domains/ubium.ru.error.log error;

    location / {
        proxy_pass      http://188.226.173.208:8080;
        location ~* ^.+\.(jpg|jpeg|gif|png|ico|svg|css|zip|tgz|gz|rar|bz2|exe|pdf|doc|xls|ppt|txt|odt|ods|odp|odf|tar|bmp|rtf|js|mp3|avi|mpeg|flv|html|htm)$ {
            root           /home/ubium/web/ubium.ru/public_html;
            access_log     /var/log/apache2/domains/ubium.ru.log combined;
            access_log     /var/log/apache2/domains/ubium.ru.bytes bytes;
            expires        max;
            try_files      $uri @fallback;
        }
    }

    location /error/ {
        alias   /home/ubium/web/ubium.ru/document_errors/;
    }

    location @fallback {
        proxy_pass      http://188.226.173.208:8080;
    }

    location ~ /\.ht    {return 404;}
    location ~ /\.svn/  {return 404;}
    location ~ /\.git/  {return 404;}
    location ~ /\.hg/   {return 404;}
    location ~ /\.bzr/  {return 404;}

    include /home/ubium/conf/web/nginx.ubium.ru.conf*;
}

Please, help me, if it is possible.