I have just setup an Ubuntu web server to use at home as a backup and development server for a website I have. I am using dyndns so my colleges can access this also and test new code.
This works well but I'm worried about security. This has only been open to the world for 24 hours and already had hack attempts from 4 different IP addresses. (korea and hong kong)
- hack attempts being trying to login over ssh with usernames such as root, oracle, smbuser
How can I secure this server more so I can feel at ease?
FYI, the data is not highly confidential so not the end of the world if anyone gets in, but obviously don't want people playing around with it.
Update, I did add my public ssh key to the server to login but after a restart went back to normal