Plusnet DNS Issues
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- Re: Plusnet DNS Issues
Plusnet DNS Issues
24-10-2013 4:43 PM
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When I do an nslookup using the Plusnet DNS servers that my router (Technicolor TG582n) is using:
$ nslookup www.netflix.com 212.159.6.9
Server: 212.159.6.9
Address: 212.159.6.9#53
** server can't find www.netflix.com: NXDOMAIN
$ nslookup www.netflix.com 212.159.6.10
Server: 212.159.6.10
Address: 212.159.6.10#53
** server can't find www.netflix.com: NXDOMAIN
Though if I use Google DNS:
$ nslookup www.netflix.com 8.8.8.8
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
www.netflix.com canonical name = dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com.
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.186.229
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.102
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.188.229
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.184.243
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.50
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.187.142
I can access the site from outside my Plusnet broadband (3G, work, etc), and various tools online are reporting that www.netflix.com is resolving fine for them too, so I don't think it's an issue with Netflix. Oddly enough, it's only www.netflix.com that isn't resolving, the domain itself and various subdomains used by them are working fine (netflix.com, signup.netflix.com, movies.netflix.com, etc).
It's been like this for more than a few days now, although I haven't noticed it on any other sites (so far). Can anyone else confirm whether or not this is happening to them too? Is it just me?!
Re: Plusnet DNS Issues
24-10-2013 4:46 PM
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orbrey@LoudmouthHarry:~$ nslookup www.netflix.com 212.159.6.9
Server: 212.159.6.9
Address: 212.159.6.9#53
Non-authoritative answer:
www.netflix.com canonical name = dualstack.wwwservice--frontend-373494752.eu-wes t-1.elb.amazonaws.com.
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.102
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.187.142
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.50
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.184.243
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.186.229
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.188.229
orbrey@LoudmouthHarry:~$ nslookup www.netflix.com 212.159.6.10
Server: 212.159.6.10
Address: 212.159.6.10#53
Non-authoritative answer:
www.netflix.com canonical name = dualstack.wwwservice--frontend-373494752.eu-wes t-1.elb.amazonaws.com.
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.184.243
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.186.229
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.50
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.187.142
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.188.229
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.102
Re: Plusnet DNS Issues
24-10-2013 4:47 PM
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Taking a look now to see what's going on.
Re: Plusnet DNS Issues
24-10-2013 4:55 PM
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Can you raise a ticket with the nslookups on it and we'll get it looked into from here.
Re: Plusnet DNS Issues
24-10-2013 5:06 PM
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Quote from: Chris Although strangely netflix.com (without the www) is working fine for all of us.
Indeed! As I mentioned in my original post, the domain itself and the various subdomains (signup.netflix.com, movies.netflix.com) are all working fine, it only seems to be affecting www.netflix.com (that I know of).
Quote from: Chris Can you raise a ticket with the nslookups on it and we'll get it looked into from here.
Done, question #76246172.
Re: Plusnet DNS Issues
24-10-2013 5:10 PM
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Re: Plusnet DNS Issues
25-10-2013 4:02 PM
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Interestingly I am able to stream through the PS3 or Xbox 360 just fine
Re: Plusnet DNS Issues
25-10-2013 4:29 PM
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It seems simply going to www.netflix.com instead of netflix.com is where the issue is.
Re: Plusnet DNS Issues
25-10-2013 5:30 PM
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As far as I can see, plusnet's DNS servers are returning SERVFAIL not the NXDOMAIN quoted in the first post.
Edit:
I have come to the barely believable conclusion that Plusnet's DNS servers cannot resolve any hostnames containing 37349
dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com - timeout
dualstack.wwwservice--frontend-373484752.eu-west-1.elb.amazonaws.com - returns NXDOMAIN
www.37349.plus.net - times out (should be NXDOMAIN, probably)
www.37349.example.com - times out
as37349.peeringdb.com - time out (should resolve to 205.166.250.194)
Perhaps the problem is due to some security measure badly implemented: http://dnsamplificationattacks.blogspot.co.uk/2013/10/domain-37349info.html
A bit like last time when some security change blocked lookups for isc.org and ripe.net (I haven't found the thread where Plusnet eventually admitted it was their fault).
Re: Plusnet DNS Issues
28-10-2013 10:52 AM
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Re: Plusnet DNS Issues
28-10-2013 1:31 PM
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Quote from: ejs If you try to browse to http://netflix.com it just redirects you to www.netflix.com which fails to resolve.
As far as I can see, plusnet's DNS servers are returning SERVFAIL not the NXDOMAIN quoted in the first post.
Edit:
I have come to the barely believable conclusion that Plusnet's DNS servers cannot resolve any hostnames containing 37349
dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com - timeout
dualstack.wwwservice--frontend-373484752.eu-west-1.elb.amazonaws.com - returns NXDOMAIN
www.37349.plus.net - times out (should be NXDOMAIN, probably)
www.37349.example.com - times out
as37349.peeringdb.com - time out (should resolve to 205.166.250.194)
You should now be able to resolve to these too.
Re: Plusnet DNS Issues
28-10-2013 7:08 PM
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$ nslookup www.netflix.com 212.159.6.9
Server: 212.159.6.9
Address: 212.159.6.9#53
Non-authoritative answer:
www.netflix.com canonical name = dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com.
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.50
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.184.243
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.187.142
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.188.229
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.186.229
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.102
$ nslookup www.netflix.com 212.159.6.10
Server: 212.159.6.10
Address: 212.159.6.10#53
Non-authoritative answer:
www.netflix.com canonical name = dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com.
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.184.243
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.102
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.185.50
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.188.229
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.187.142
Name: dualstack.wwwservice--frontend-373494752.eu-west-1.elb.amazonaws.com
Address: 176.34.186.229
Cheers for the help.
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