Plusnet DNS Intermittent faults
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Plusnet DNS Intermittent faults
16-10-2013 2:43 PM
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I spent the past few days trying to find out why I was unable to connect to websites, email, FTP or connect to gaming severs and it appears to be a problem with using Plusnets DNS servers. Trying to view a website takes upto 20 refreshes of the site for it to finally appear.
I tried switching the DNS settings in my router from "Obtain automatically from ISP" to using googles DNS (8.8.8.8 and 8.8.4.4) and it immediately fixed the problem. I opened a ticket with Plusnet and they said that nobody else has the problem and gave me there IP's for their DNS which I tried instead of googles DNS and it failed again straight away.
I have resorted to running on googles DNS to be able to contact support and post here.
I just wondered if others had the same connection issue and had not realised that it was DNS related.
It happens on multiple PC's, OS's, browsers and with 2 different routers I have tried so they issue doesnt seem ot be coming from my own hardward or software.
Running traceroutes gives the standard DNS problem message "Unable to resolve target system name".
If anyone's got the same issue or any bright ideas ot sort it let me know.
Re: Plusnet DNS Intermittent faults
16-10-2013 2:57 PM
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Re: Plusnet DNS Intermittent faults
16-10-2013 3:13 PM
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We're definitely not aware of any issues with our DNS so I'd say it's more likely that this was caused by an issue in how your router was set up.
We have some guides available here in case you wanted to try specifying our DNS servers but you might want to leave your set up as it is now that you've rectified the issue
http://www.plus.net/support/software/index.shtml
Re: Plusnet DNS Intermittent faults
16-10-2013 3:24 PM
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Re: Plusnet DNS Intermittent faults
16-10-2013 4:47 PM
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Here is a bit of info, i'll post a graph in a short while.
PING 212.159.6.9 (212.159.6.9) 56(84) bytes of data.
64 bytes from 212.159.6.9: icmp_seq=1 ttl=250 time=17.4 ms
64 bytes from 212.159.6.9: icmp_seq=2 ttl=250 time=16.9 ms
64 bytes from 212.159.6.9: icmp_seq=3 ttl=250 time=15.9 ms
64 bytes from 212.159.6.9: icmp_seq=4 ttl=250 time=16.4 ms
64 bytes from 212.159.6.9: icmp_seq=5 ttl=250 time=16.6 ms
64 bytes from 212.159.6.9: icmp_seq=6 ttl=250 time=16.2 ms
64 bytes from 212.159.6.9: icmp_seq=7 ttl=250 time=16.6 ms
64 bytes from 212.159.6.9: icmp_seq=8 ttl=250 time=16.6 ms
^C
--- 212.159.6.9 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7007ms
rtt min/avg/max/mdev = 15.947/16.621/17.447/0.451 ms
PING 212.159.6.10 (212.159.6.10) 56(84) bytes of data.
64 bytes from 212.159.6.10: icmp_seq=1 ttl=250 time=16.5 ms
64 bytes from 212.159.6.10: icmp_seq=2 ttl=250 time=16.3 ms
64 bytes from 212.159.6.10: icmp_seq=3 ttl=250 time=17.3 ms
64 bytes from 212.159.6.10: icmp_seq=4 ttl=250 time=16.1 ms
64 bytes from 212.159.6.10: icmp_seq=5 ttl=250 time=16.4 ms
64 bytes from 212.159.6.10: icmp_seq=6 ttl=250 time=17.0 ms
64 bytes from 212.159.6.10: icmp_seq=7 ttl=250 time=17.4 ms
64 bytes from 212.159.6.10: icmp_seq=8 ttl=250 time=16.9 ms
^C
--- 212.159.6.10 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7009ms
rtt min/avg/max/mdev = 16.186/16.793/17.413/0.459 ms
PING 212.159.13.49 (212.159.13.49) 56(84) bytes of data.
64 bytes from 212.159.13.49: icmp_seq=1 ttl=250 time=17.3 ms
64 bytes from 212.159.13.49: icmp_seq=2 ttl=250 time=16.2 ms
64 bytes from 212.159.13.49: icmp_seq=3 ttl=250 time=16.6 ms
64 bytes from 212.159.13.49: icmp_seq=4 ttl=250 time=17.3 ms
64 bytes from 212.159.13.49: icmp_seq=5 ttl=250 time=16.9 ms
64 bytes from 212.159.13.49: icmp_seq=6 ttl=250 time=16.5 ms
64 bytes from 212.159.13.49: icmp_seq=7 ttl=250 time=16.4 ms
64 bytes from 212.159.13.49: icmp_seq=8 ttl=250 time=16.6 ms
^C
--- 212.159.13.49 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7009ms
rtt min/avg/max/mdev = 16.214/16.783/17.398/0.420 ms
PING 212.159.13.50 (212.159.13.50) 56(84) bytes of data.
64 bytes from 212.159.13.50: icmp_seq=1 ttl=250 time=17.5 ms
64 bytes from 212.159.13.50: icmp_seq=2 ttl=250 time=16.6 ms
64 bytes from 212.159.13.50: icmp_seq=3 ttl=250 time=17.1 ms
64 bytes from 212.159.13.50: icmp_seq=4 ttl=250 time=16.9 ms
64 bytes from 212.159.13.50: icmp_seq=5 ttl=250 time=17.6 ms
64 bytes from 212.159.13.50: icmp_seq=6 ttl=250 time=16.9 ms
64 bytes from 212.159.13.50: icmp_seq=7 ttl=250 time=16.6 ms
64 bytes from 212.159.13.50: icmp_seq=8 ttl=250 time=16.9 ms
^C
--- 212.159.13.50 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7009ms
rtt min/avg/max/mdev = 16.634/17.058/17.676/0.357 ms
Nameserver Response Time (ms)
min/avg/max/stdev/retries
192.168.0.15 0.58/0.60/0.68/0.04/0
212.159.6.9 17.22/17.85/18.64/0.46/0
212.159.6.10 17.49/17.82/18.18/0.24/0
212.159.13.49 17.27/18.01/18.63/0.56/0
212.159.13.50 17.28/17.85/18.17/0.32/0
208.67.222.222 17.49/18.07/18.83/0.56/0
208.67.222.220 17.23/17.39/17.65/0.16/0
208.67.222.123 17.47/17.67/17.97/0.18/0
208.67.220.123 17.07/17.62/18.20/0.36/0
8.8.8.8 22.98/23.35/23.88/0.40/0
8.8.4.4 22.98/23.27/23.65/0.25/0
4.2.2.1 17.23/17.54/17.73/0.18/0
4.2.2.6 16.83/17.28/17.70/0.37/0
Re: Plusnet DNS Intermittent faults
16-10-2013 5:13 PM
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(The ns_bench figures are from Windows, so subtract 2 or 3 ms for the real figure - but it's the variability compared to OpenDNS which is the notable thing.)
Having said that, it hasn't caused my router any problems.
I'm on ptn-ag02
[tt]
Pinging 212.159.6.9 with 32 bytes of data:
Reply from 212.159.6.9: bytes=32 time=3ms TTL=250
Reply from 212.159.6.9: bytes=32 time=3ms TTL=250
Reply from 212.159.6.9: bytes=32 time=3ms TTL=250
Reply from 212.159.6.9: bytes=32 time=9ms TTL=250
Reply from 212.159.6.9: bytes=32 time=4ms TTL=250
Reply from 212.159.6.9: bytes=32 time=15ms TTL=250
Reply from 212.159.6.9: bytes=32 time=14ms TTL=250
Reply from 212.159.6.9: bytes=32 time=14ms TTL=250
Reply from 212.159.6.9: bytes=32 time=13ms TTL=250
Reply from 212.159.6.9: bytes=32 time=11ms TTL=250
Ping statistics for 212.159.6.9:
Packets: Sent = 10, Received = 10, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 3ms, Maximum = 15ms, Average = 8ms
Nameserver Response Time (ms)
min avg max stdev retries
212.159.6.9 5.85 9.55 16.45 4.34 0
212.159.6.10 6.27 8.24 10.79 1.58 0
212.159.13.49 6.65 8.72 11.75 1.86 0
212.159.13.50 6.25 7.26 9.39 1.13 0
208.67.222.222 6.22 6.51 7.36 0.44 0
208.67.220.220 5.88 5.98 6.09 0.08 0
212.159.6.9 5.85 6.74 7.50 0.63 0
212.159.6.10 6.07 6.16 6.35 0.10 0
212.159.13.49 5.90 6.48 6.90 0.37 0
212.159.13.50 6.27 6.89 8.10 0.67 0
208.67.222.222 6.04 6.26 6.49 0.17 0
208.67.220.220 5.94 6.21 6.75 0.29 0
212.159.6.9 5.82 6.19 6.39 0.23 0
212.159.6.10 6.27 10.96 19.82 5.70 0
212.159.13.49 5.91 6.28 7.15 0.46 0
212.159.13.50 6.13 7.23 7.89 0.59 0
208.67.222.222 6.05 6.17 6.32 0.10 0
208.67.220.220 5.90 6.21 6.39 0.18 0
212.159.6.9 6.06 7.74 12.07 2.28 0
212.159.6.10 5.66 6.25 7.04 0.49 0
212.159.13.49 6.21 6.88 8.45 0.84 0
212.159.13.50 6.06 6.22 6.62 0.21 0
208.67.222.222 5.76 6.02 6.34 0.20 0
208.67.220.220 5.71 6.20 6.88 0.41 0
[/tt]
Re: Plusnet DNS Intermittent faults
16-10-2013 5:33 PM
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I also run the exact same router configuration on an identical router with another different plusnet connection and that has had no problems.
It was fixed for a few hours the other day and the plusnet DNS worked correclty but then went intermittent again.
Clearly this is not a plusnet DNS wide issue but its only when using plusnet DNS that I have the problem. If it was a connection issue or router problem then using google DNS would not have solved the problem.
I have switched back to the router DNS "Obtan autmatically from ISP" again and it is currently working so I can't post any ping test results until the problem happens again.
Re: Plusnet DNS Intermittent faults
16-10-2013 5:35 PM
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Maybe it's just a mirage in the guise of plusneT
Re: Plusnet DNS Intermittent faults
16-10-2013 5:38 PM
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Re: Plusnet DNS Intermittent faults
16-10-2013 5:47 PM
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Re: Plusnet DNS Intermittent faults
16-10-2013 6:20 PM
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Quote from: _Adam_Walker_ We're definitely not aware of any issues with our DNS
What about https://community.plus.net/forum/index.php/topic,118268.96.html (77437)?
I seem to have randomly mostly avoided being on Telehouse (ptn and ptw) gateways recently, so I can't say whether it has since been fixed. That problem was only noticeable at peak times.
Re: Plusnet DNS Intermittent faults
16-10-2013 6:44 PM
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Can someone provide the list of IP's that belong to Plusnet DNS.
212.159.6.9
212.159.6.10
212.159.13.49
212.159.13.50
208.67.222.222
208.67.220.220
Are there just these or more?
Re: Plusnet DNS Intermittent faults
16-10-2013 6:58 PM
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Quote from: Tensulp 212.159.6.9
212.159.6.10
212.159.13.49
212.159.13.50
These are the plusnet ones.
Quote from: Tensulp 208.67.222.222
208.67.220.220
These are OpenDNS.
Re: Plusnet DNS Intermittent faults
16-10-2013 7:04 PM
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I can complete the BT speedtest without any faults being found so I'm told it must be me.
Re: Plusnet DNS Intermittent faults
16-10-2013 7:20 PM
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You are currently connected to gateway ptn-ag01.
This is located in Telehouse North.
Changing DNS to OpenDNS has made a big difference to my speed.
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