Hes not DoSing me but using all my bandwidth and slowing server!

First Off it's jail shell Hes not DoSing me but using all my bandwidth and slowing server! But anyways I use top a lot what other useful commands are there for security..

One problem I have this person refreshes my website page like 8 times a sec and waists like 1 gigbandwidth every 9 hours or so and this what I did.

Blocked his ip
Contacted his isp
Contacted the person
told my host - they blocked him from the firewall

He changes his ip and his ip is not like 23.111.111.111 and then chnages to 23.111.111.112 it's like chnages from 24.and chnages hes using some roadrunner isp or something and he has friends now going to do it.. there way way shell get ip's and see hwos doign all the requests or something only way I find out is use the logs and see his ip gone to a page a lot and use blah blah bandwidth and one them in like 1 day was like 6gigs bandwidth it's nuts Hes not DoSing me but using all my bandwidth and slowing server!
Help me give me ideas anything Im using reseller Hes not DoSing me but using all my bandwidth and slowing server! anything in shell even if I have to do manuly but have something in shell telling em his ip isntead waitng for these logs to uopdate what host uses most bandwidth Hes not DoSing me but using all my bandwidth and slowing server!

 

 

 

 

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