Can't Access apache webserver outside Ubuntu

Question

I want to access my website outside Ubuntu but it not work I can access the website inside عbuntu and every thing fine I executed this command

sudo netstat -taupen | grep LISTEN

and I have this result

tcp        0      0 127.0.1.1:53            0.0.0.0:*               LISTEN      0          17400       1012/dnsmasq
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      0          29406       936/sshd
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      123        19686       942/mysqld
tcp6       0      0 :::22                   :::*                    LISTEN      0          29408       936/sshd
tcp6       0      0 :::80                   :::*                    LISTEN      0          66907       6103/apache2

and this some content of apache2.conf file

<Directory />
    Options FollowSymLinks
    AllowOverride None
    Require all denied
</Directory>
<Directory /usr/share>
    AllowOverride None
    Require all granted
</Directory>
<Directory /var/www/>
    Options Indexes FollowSymLinks
    AllowOverride None
    Require all granted
</Directory>