Re: [nznog] ip ranges

From: Nathan Ward Subject: Re: [nznog] ip ranges To: nznog Message-ID: Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes

On 14/05/2008, at 4:49 PM, Vaafuti Alauni (Vaa) wrote:

...

Thanks guys for your fast responses,

some sites some of our customers are having troubles with are : sites within tv3.co.nz (doubleclick.net) sites within tvone.co.nz (tvoneondemand.co.nz) some links in yellow.co.nz and white pages.

the specific ranges that our customers sourcing from is the 202.68.86.0/23

Your customers are complaining about not being able to see advertisements on the TV3 website? :-)

Looks to me like your BGP advertisements are a bit wierd, but it's hard to be sure from where I'm sitting. For example, WIX has 202.68.86/24, and 202.68.87/24. Why are you not advertising that as a /23?

APE doesn't have either prefix, or the /23. It does seem to have 202.68.94/23 though, which is in your /19.

Both appear internationally as /24s, no /23 - this means that those other NZ networks /should/ see your traffic, unless you have some kind of filtering in place. You don't have strict RPF or anything do you?

Do you have routes to reach those networks? I assume so, if you're able to reach them from some of your prefixes.

I also notice that subnets of 202.68.87/24 appear on WIX - a /27 and a /28. Are these the customers that are having problems?

Aggregation would be good while we're at it: http://www.cidr-report.org/cgi-bin/as-report?as=AS24183&view=2.0

I wonder if those sites are with (or transited by) telstraclear, I remember their transparent proxy causes problems similar to this in our network at times. I think it might even have been you (Nathan) that pointed out its existence to me :). I ran into problems with it by advertising more specific prefixes at WIX. Since we got rid of that it seems to be okay. Regards, Anton