[as112-ops] [IANA #516549] Blackhole servers

[mohammed.el-shakweer at bell.ca]

Hello Anand;

Thanks for your response, below is a trace we were seeing, the first blackhole server not responding, and then the 2nd one responding as below;

No.     Time        Source                Destination           Protocol Length Info
   2186 10.757689   10.130.72.21          10.130.201.18         DNS      96     Standard query PTR 210.4.20.172.in-addr.arpa
   2188 10.758043   10.130.201.18         192.175.48.6          DNS      96     Standard query PTR 210.4.20.172.in-addr.arpa    >>>>>>>>>>>>>blackhole-1.iana.org>>>>no response
   2454 12.793212   10.130.72.21          10.130.201.18         DNS      96     Standard query PTR 210.4.20.172.in-addr.arpa
   2831 14.793076   10.130.72.21          10.130.201.18         DNS      96     Standard query PTR 210.4.20.172.in-addr.arpa
   3569 16.793252   10.130.72.21          10.130.201.18         DNS      85     Standard query PTR 210.4.20.172.in-addr.arpa
   4314 19.993019   10.130.72.21          10.130.201.18         DNS      85     Standard query PTR 210.4.20.172.in-addr.arpa
   4414 20.758160   10.130.201.18         192.175.48.42         DNS      96     Standard query PTR 210.4.20.172.in-addr.arpa
   4430 20.812626   192.175.48.42         10.130.201.18         DNS      173    Standard query response, No such name arpa    >>>>>>>>>>>>>blackhole-2.iana.org>>>> response




Best Regards


Mohammed El-Shakweer
Network Specialist
Data Network Services & Support (DNSS)
Bell Canada
200 Bouchard Blvd., 6CS
Dorval, Québec, Canada
Tel: (514) 828-9384
mohammed.el-shakweer at bell.ca
www.bell.ca
 
Confidentiality warning

-----Original Message-----
From: Anand Buddhdev [mailto:anandb at ripe.net] 
Sent: December-22-11 6:59 AM
To: El-Shakweer, Mohammed (6038808)
Cc: iana-questions at iana.org; as112-ops at lists.dns-oarc.net
Subject: Re: [as112-ops] [IANA #516549] Blackhole servers

On 21/12/2011 23:09, mohammed.el-shakweer at bell.ca wrote:

> Hello AS112-ops;
> 
> Regarding the blackhole servers, were there any issues in the past
> 10 days with these servers, as we were having problems getting responses
> for 172.16.0.0 - 172.31.255.255 private addressing space, sometimes no
> response or slow response. We realize that we should use an internal
> blackhole or configure the reverse zones for private addressing internal
> to avoid slow response from blackhole servers on the internet, which we
> plan to do soon, but if you can shed some light if there were any issues
> in the past 10 days that would be highly appreciated.

I believe ISC was testing BIND 10 on their AS112 instance. If you
happened to see prefixes from them, then you may have had trouble
getting responses for your queries.

Regards,

Anand Buddhdev
RIPE NCC