/etc/hosts.allow and IP ranges

I'm not too up on networking, so I need a little help.

I keep on seeing failed log-in attempts from a dial up account IP. All the dial up IP's start the same 64.174.184.24, 64.174.185.81 etc...

How would I go about DENY ing tcp services to this IP range, and where exactly would I do it? I DENY: ALL in hosts.deny and open up things in allow. Can I do more DENY ing in hosts.allow?

I don't mind shutting out a few dial up's from this network.

Thanks for your help. I also need to open up an IP range for someone, but I'm assuming if someone show's me how to DENY a range, I can figure out how to open one up.

 

 

 

 

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