telnet and ftp security

Hi,

I'm linux newbie, some questions in this post may be silly for the experts.
I'm using telnet and ftp services to manage my server running on micro2440.
To prevent other user to access it, I'm using a root password. 

Is this enough to block access of a malicious user?
How could I improve the security of my server?
How could I check any other service that could let an open door to my
server?

The only way I know to break my password is brute force attack, or a
malicious user would try something better?


Thanks in advance

Hi,

Use very good pwd (brutforce), get lasted version of server, and good file
configuration and right management.
FTP and telnet using not encrypting protocol, you should use SSH, and SFTP.
And finally look log system file.

Thanks for your response themadmax. I'll look for the last versions of
server or a cross compiled ssh server.

:D