Unknown Bots eating up my valuable bandwidth!! How to stop!!

If you see the above screenshot of my bandwidth usage. You can see the maximum number of bandwidth used by unknown bots.

What I wanted to confirm was are these of any use?? If not how do I stop them from eating up my valuable bandwidth.

 

review logs to determine if they're coming from the same IPs - so you can cut them by IP

 

Cant detect exactly. Detected some stuffs but not sure its cos of that??

One Ip seems to be of Worldcall Telecom Ltd pakistan, other of RIPE Network Coordination Centrea and third one of my own host. There are repeated huge number of hits from these three.

Surprising part is why does my own hos ip show up?? Does that mean that ther's some fault in the script or plugin used?

 

You can block by detecting the User Agent, through .htaccess:

RewriteEngine on 
RewriteCond %{HTTP_USER_AGENT} ^$
RewriteRule ^.* - [F] 

Code (markup):

That should work.

 

But how do I confirm if they are of any use to my site or they are just useless.

 

Download a list of useful bots and remove the others

 

How do I specify an ip address with this