point taken lord of the rings.

To make things clear my list of blocked hosts was intended to block out ALL T3 or higher hosts -some of which certainly had bad files on, but some of which may not have. It's only a small refinement on Deadly's list but it does allow some non-T3 hosts which his list blocks.

I notice that the latest version of gnucleus which I played around with has included in it a long list of blocked IPs along with interesting reasons why they're blocked (i.e. belong to 'sony music', 'is an anti-piracy site' etc). I'm not sure if this is directly linked to the problem of corrupt files. Anyway, the list is not comprehensive enough as it allows plenty of hosts with corrupt files through.

I'm getting close to the limits of my knowledge here, but I'm presuming that when a host uses a dynamic IP, the IP keeps changing so that the host cannot be blocked by blocking any one IP address.

If hosts with bad files are using dynamic IPs the only way to block them is to block a range of IP addresses (to cover all the IP addresses they're using). This always has the risk of blocking some hosts who don't have corrupt files. The trick is to narrow down the range of blocked IPs as far as possible and to specifically allow IPs that are known to be from hosts without corrupt files. At some point it becomes a trade off between allowing bad files and allowing wider searches.

If people know the IPs of T3 or higher hosts that dont have corrupt files on them then please post a list so that these hosts may be allowed (i.e. added in limewire options).