If by 'use internet' you want to use Access across WAN...
If it's an Access backend, forget about it. It's great for a office LAN, but WAN will only bring corruption and heartbreak.
For that reason, if remote access is desired, we usually look at three options:
1) Use a Terminal Server or VNC.
2) Use a RDBMS such as MySQL, Oracle, SQL Server, PostgreSQL that has a robust client library for remote access; Access is quite an excellent front-end client and works well with any of those.
3) Use replication (which is only good if you're using .mdb and do not intend to move to the new format .accdb which no longer supports this feature)