Where I can download a list of IP networks delegated to UK ISP?

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Registered User

If you mean you want to see which routes a particular AS number is announcing, then use something like:

http://www.as3344.net/filtergen/

and enter the AS macro of the ISP.

Kris

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Thank you for your reply Kris, but I'd like to have a list to allow access to my resource for UK visitors only.
Any help would be appreciated.

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You can't really, it would be the holy grail if possible, but it's just not.

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tis easy http://www.maxmind.com/app/geolitecountry

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What Neil said though its not totally flawless. You will get some misses and false positives but it's a good start.

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But that's user compiled, as opposed to a definative list.. which means that it's only as accurate as the last person to add an entry.

Better than nothing, but RiPE for example dont release a list.

J

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Yes, we use geoip at this moment.
Unfortunately this is very bad solution for site with a lot of traffic.

It is a pity this list is not exist for UK.

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Registered User

I'd imagine even with a list of "UK networks" AOL (and probably others) would still cause problems as they do with the "free" version of the GeoLite.

ChrisB.

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administrator, I'm not sure can I use geocountry with ipfw?

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It shouldn't take much scripting to make a CIDR out of the CSV file to use in your firewall rules.

ChrisB.

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ripe does have a list, assuming companies have entered the correct details :P Neither solution will be perfect. You can download from the public ftp's for ripe , arin , apnic etc etc and then extract what you need.

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What about tracerouting to them and seeing the latency on the penultimate hop? Could probably use that to refine things. E.G. <10ms is in the UK, >10ms check GeoIP, >50ms definitely not in the UK.

Nothing is perfect

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...and what about the providers that use part of their ARIN alloc in Europe or part of their RIPE block in Asia for example (rather than maintain another relationship with another RIR). I know of several that do.

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To do it on the fly, tracerouting really would not work due to the time to load. You could of course display a please wait while we check your connection page.

It's not going to be perfect, but a geoip database is as perfect as needed really.

You could always verify people by sending them a SMS text code to uk mobile numbers only

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