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DNS weirdness

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Community Veteran
Posts: 38,460
Thanks: 1,033
Fixes: 62
Registered: ‎15-06-2007

Re: DNS weirdness

i got to all of them but the last one needed a second try - using OpenDNS
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Community Gaffer
Community Gaffer
Posts: 14,570
Thanks: 2,182
Fixes: 152
Registered: ‎04-04-2007

Re: DNS weirdness

Quote from: spacecowboy
Is it safe for a non-techie like me to play with MTU/RWIN settings?  If so, would you suggest any particular settings to try?

I'd start with changing the MTU on your router/PC to 1430.

Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵

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Grafter
Posts: 235
Registered: ‎09-05-2008

Re: DNS weirdness

Quote from: spacecowboy
P.S.  Here are some of the other sites i can't access -
www.meldexinternational.com
www.picturecraftgallery.com
www.westcliffegallery.com

I can reach all these and the Bristol site without a problem.

A couple of other things you can try.....

Flush your DNS cache:
From the Start menu select Run, type cmd and press Enter.  In the DOS window type  ipconfig /flushdns and press Enter.

Clear your Temporary Internet Files and History:
Assuming IE - Select Tools/Options and first Delete Temporary Internet Files and then Clear History.
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Community Veteran
Posts: 38,460
Thanks: 1,033
Fixes: 62
Registered: ‎15-06-2007

Re: DNS weirdness

Re MTU - mine is set at 1500 on the router and my PC
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Grafter
Posts: 204
Registered: ‎07-08-2007

Re: DNS weirdness

Quote from: Bob
@dannykos, are you running your traceroutes from a Windows box or are you using a different OS? The reason I ask is because I wouldn't expect ICMP traces to be affected if this is actually down to the dodgy Ellacoya sig.

Bob - sorry for not getting back to you - been at Legoland with the kids Smiley
Yeah - i'm on a mac running 10.411 (tiger)
current traces:
traceroute to 212.159.6.9 (212.159.6.9), 64 hops max, 40 byte packets
1  192.168.0.1 (192.168.0.1)  2.728 ms  13.176 ms  21.863 ms
2  * lo0.plusnet.thn-ag2.plus.net (195.166.128.93)  35.802 ms  38.354 ms
3  vl604.thn-gw1.plus.net (84.92.4.169)  40.892 ms  634.427 ms  28.762 ms
4  ae0-102.ptn-gw01.plus.net (212.159.1.53)  28.809 ms  27.349 ms  27.636 ms
5  * * *
6  * * *
7  * * *
8  * * *
9  * * *
10  * * *
traceroute to 212.159.6.10 (212.159.6.10), 64 hops max, 40 byte packets
1  192.168.0.1 (192.168.0.1)  3.641 ms  9.596 ms  2.505 ms
2  lo0.plusnet.thn-ag2.plus.net (195.166.128.93)  40.198 ms  30.964 ms  26.102 ms
3  vl604.thn-gw1.plus.net (84.92.4.169)  26.293 ms  25.753 ms  27.705 ms
4  ae0-102.ptn-gw01.plus.net (212.159.1.53)  147.096 ms  173.725 ms  198.544 ms
5  * * *
6  * * *
7  ae0-102.ptn-gw01.plus.net (212.159.1.53)  25.452 ms !X * *
8  * * *
9  * * *
10  * * *

hmmm.....  over to you Bob!
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Grafter
Posts: 2,083
Registered: ‎04-04-2007

Re: DNS weirdness

Dunno if it's just me.  But seem to be getting weird DNS timeouts again this evening :-
Quote
C:\Users\Liam>nslookup go-ape.com 212.159.6.9
Server:  ptn-cdns01.plus.net
Address:  212.159.6.9:53
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** Request to ptn-cdns01.plus.net timed-out
C:\Users\Liam>nslookup go-ape.com 212.159.6.10
Server:  ptn-cdns02.plus.net
Address:  212.159.6.10:53
DNS request timed out.
    timeout was 2 seconds.
*** Request to ptn-cdns02.plus.net timed-out
C:\Users\Liam>nslookup go-ape.com 212.159.13.49
Server:  pth-cdns01.plus.net
Address:  212.159.13.49:53
*** pth-cdns01.plus.net can't find go-ape.com: Server failed
C:\Users\Liam>nslookup go-ape.com 212.159.13.50
Server:  pth-cdns02.plus.net
Address:  212.159.13.50:53
DNS request timed out.
    timeout was 2 seconds.
*** pth-cdns02.plus.net can't find go-ape.com: Server failed

EDIT:  Appears fine querying OpenDNS :-
C:\Users\Liam>nslookup go-ape.com 208.67.222.222
Server:  resolver1.opendns.com
Address:  208.67.222.222:53
Non-authoritative answer:
Name:    go-ape.com
Address:  67.215.66.132

C:\Users\Liam>nslookup go-ape.com 208.67.220.220
Server:  resolver2.opendns.com
Address:  208.67.220.220:53
Non-authoritative answer:
Name:    go-ape.com
Address:  67.215.66.132
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Newbie
Posts: 1
Registered: ‎12-07-2009

Re: DNS weirdness

I've just picked up on this thread - I've been suffering from symptoms like these for some days.  Suspected the router, suspected the firewall - but the descriptions here match my symptoms.  Still happening today, though less often.
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Community Gaffer
Community Gaffer
Posts: 14,570
Thanks: 2,182
Fixes: 152
Registered: ‎04-04-2007

Re: DNS weirdness

Quote from: dannykos
Quote from: Bob
@dannykos, are you running your traceroutes from a Windows box or are you using a different OS? The reason I ask is because I wouldn't expect ICMP traces to be affected if this is actually down to the dodgy Ellacoya sig.

Bob - sorry for not getting back to you - been at Legoland with the kids Smiley
Yeah - i'm on a mac running 10.411 (tiger)

That would explain it then, AFAIK traceroute on a MAC uses UDP as opposed to ICMP.
Quote
current traces:
traceroute to 212.159.6.9 (212.159.6.9), 64 hops max, 40 byte packets
1  192.168.0.1 (192.168.0.1)  2.728 ms  13.176 ms  21.863 ms
2  * lo0.plusnet.thn-ag2.plus.net (195.166.128.93)  35.802 ms  38.354 ms
3  vl604.thn-gw1.plus.net (84.92.4.169)  40.892 ms  634.427 ms  28.762 ms
4  ae0-102.ptn-gw01.plus.net (212.159.1.53)  28.809 ms  27.349 ms  27.636 ms
5  * * *
6  * * *
7  * * *
8  * * *
9  * * *
10  * * *

Am I correct in assuming that this is intermittent and your traceroutes don't always time out?
@Liam @banburyz are you guys still having problems?

Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵

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Community Veteran
Posts: 3,486
Registered: ‎02-10-2008

Re: DNS weirdness

Bob - as far as you're concerned have the DNS routers been behaving in the last couple of days.
Luckily I haven't suffered any problems - just been reading about others problems
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Grafter
Posts: 204
Registered: ‎07-08-2007

Re: DNS weirdness

Quote from: Bob
Am I correct in assuming that this is intermittent and your traceroutes don't always time out?

@Bob – not entirely sure what's happening to be honest…  my connection feels like i'm not getting full line speed all the time. When I run a speedtest - it's all over the place, even during the test, fluctuating alot.  Actual results seem ok (not great) - but there's just something not quite right.  Also - trying to play World Golf Tour (wgt.com) is a total nightmare Sad
traceroute to 212.159.6.9 (212.159.6.9), 64 hops max, 40 byte packets
1  192.168.0.1 (192.168.0.1)  4.632 ms  1.458 ms  2.708 ms
2  lo0.plusnet.thn-ag2.plus.net (195.166.128.93)  45.565 ms  29.417 ms  38.290 ms
3  vl604.thn-gw1.plus.net (84.92.4.169)  25.865 ms  29.905 ms  38.960 ms
4  ae0-102.ptn-gw01.plus.net (212.159.1.53)  25.532 ms  25.562 ms  25.011 ms
5  * * *
6  ae0-102.ptn-gw01.plus.net (212.159.1.53)  28.694 ms !X * *
7  * * ae0-102.ptn-gw01.plus.net (212.159.1.53)  27.073 ms !X
8  * * *
9  * ae0-102.ptn-gw01.plus.net (212.159.1.53)  27.492 ms !X *
10  * * *
11  * * *
12  * * *
traceroute to 212.159.6.10 (212.159.6.10), 64 hops max, 40 byte packets
1  192.168.0.1 (192.168.0.1)  2.270 ms  3.022 ms  4.584 ms
2  lo0.plusnet.thn-ag2.plus.net (195.166.128.93)  25.575 ms  33.890 ms  28.437 ms
3  vl604.thn-gw1.plus.net (84.92.4.169)  27.136 ms  24.823 ms  25.450 ms
4  ae0-102.ptn-gw01.plus.net (212.159.1.53)  28.341 ms  27.432 ms  25.535 ms
5  * * *
6  * * *
7  ae0-102.ptn-gw01.plus.net (212.159.1.53)  30.836 ms !X * *
8  * * *
9  * * *
10  * * *
11  * * *
12  * * *
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Dabbler
Posts: 12
Registered: ‎09-06-2008

Re: DNS weirdness

I'm sorry to report that my problems have continued over the past few days, I've just been too busy to post here.
When I couldn't connect to any sites I did a tracert to 212.159.6.9 (the primary DNS that my router said I was using)
and this is what I got:
Tracing route to 212.159.6.9 over a maximum of 30 hops
  1    1 ms    1 ms    1 ms  192.168.1.1
  2    49 ms    47 ms    51 ms  195.166.128.101
  3    56 ms    47 ms    61 ms  84.92.4.241
  4    64 ms    83 ms    75 ms  212.159.1.53
  5    47 ms    68 ms    46 ms  212.159.2.124
  6    47 ms    55 ms    55 ms  212.159.6.9
Trace complete.
You'll see that no names are reported, just IP addresses.
Does this mean that I can only visit sites as long as I know the IP address?!!
I have had to reset my router to get a working connection  (i.e. one that means I can actually
connect to web sites etc), and a tracert on the same DNS IP address now gives:
Tracing route to ptn-cdns01.plus.net [212.159.6.9]
over a maximum of 30 hops:
  1    2 ms    1 ms    1 ms  voyager.home [192.168.1.1]
  2    46 ms    57 ms    *    lo0-plusnet.pcl-ag01.plus.net [195.166.128.27]
  3    44 ms    54 ms    36 ms  gi1-2-803.pcl-gw1.plus.net [84.92.5.57]
  4    40 ms    54 ms    60 ms  vl63.pcl-lb01.plus.net [212.159.2.252]
  5    37 ms    41 ms    36 ms  ptn-cdns01.plus.net [212.159.6.9]
Trace complete.

This is very much still a live problem for me, which is really driving me and my kids crazy.
Can you please provide a reliable fix for this, or at least explain a bit more about the problem
and why it keeps happening?  I really don't see why I should have to reset my router to
get this to work (and then reconfigure my network name and security settings and connection
details etc).
Please, this is getting beyond a joke.
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Grafter
Posts: 21,036
Thanks: 2
Registered: ‎04-04-2007

Re: DNS weirdness

@Adriantribe
We're not seeing this problem for anyone else at all currently and there doesnt appear to have been a problem since Sunday afternoon.
Is your router/network card having its dns servers assigned manually or automatically?
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Dabbler
Posts: 12
Registered: ‎09-06-2008

Re: DNS weirdness

Hi Jameseh,
Thank you for the swift response.  The DNS settings are picked up by the modem/router automatically
when it connects.  I have explained previously that I use my laptop via three different connectivity
providers (PlusNet at home, 3 mobile on the go and a network at my workplace during the day), so
I have a feeling that it may cause problems if I hard-code DNS settings.  What do you think? 
Thanks again for your help.
Adrian
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Grafter
Posts: 2,083
Registered: ‎04-04-2007

Re: DNS weirdness

I have a weird problem.  I can't resolve www.go-ape.com at any time using plusnet's DNS servers, but I can using OpenDNS.
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Community Veteran
Posts: 38,460
Thanks: 1,033
Fixes: 62
Registered: ‎15-06-2007

Re: DNS weirdness

Open DNS doesn't work on it either now and It's not just you! http://www.go-ape.com looks down from here.