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1836 posts

Uber Geek


# 111722 13-Nov-2012 11:10
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Yesterday and today I've encountered what I think are DNS problems.

Some web pages come up fine in my browser but others sit there for a while with "Looking up hostname for ..." in the browser status bar and then say "Could not locate remote server".  If I refresh the page then sometimes I connect and sometimes I don't, after 5 or so tries I can usually connect.  My FTP program kept telling me it couldn't find the server I was trying to reach, but finally on the 10th attempt it worked.  It took me 5 or 6 attempts before Spybot could update itself.  What I'm trying to say is that this isn't limited to my browser, it's all my internet connected software.

Also it's not on just one PC, but on three different PC's on my LAN.

The router is set to obtain the DNS servers automatically.  The router says that currently the primary is 203.109.129.67 and the secondary is 203.109.129.68.  PC's are set to use the router for DNS.

I've rebooted the router in case it had got itself in a tangle.

Using nslookup to test a site using the Vodafone supplied DNS server I get the following:

C:\Documents and Settings\Murray>nslookup -debug www.aweb4u.co.nz. 203.109.129.67
------------
Got answer:
HEADER:
opcode = QUERY, id = 1, rcode = NOERROR
header flags: response, want recursion, recursion avail.
questions = 1, answers = 1, authority records = 2, additional = 2

QUESTIONS:
67.129.109.203.in-addr.arpa, type = PTR, class = IN
ANSWERS:
-> 67.129.109.203.in-addr.arpa
name = ns1.ihug.co.nz
ttl = 12903 (3 hours 35 mins 3 secs)
AUTHORITY RECORDS:
-> 129.109.203.in-addr.arpa
nameserver = core.ns1.vf.net.nz
ttl = 14476 (4 hours 1 min 16 secs)
-> 129.109.203.in-addr.arpa
nameserver = core.ns2.vf.net.nz
ttl = 14476 (4 hours 1 min 16 secs)
ADDITIONAL RECORDS:
-> core.ns1.vf.net.nz
internet address = 203.109.134.2
ttl = 36108 (10 hours 1 min 48 secs)
-> core.ns2.vf.net.nz
internet address = 203.109.135.2
ttl = 36108 (10 hours 1 min 48 secs)

------------
Server: ns1.ihug.co.nz
Address: 203.109.129.67

DNS request timed out.
timeout was 2 seconds.
timeout (2 secs)
*** Request to ns1.ihug.co.nz timed-out

Doing the same thing but using Google's DNS server I get the following:

C:\Documents and Settings\Murray>nslookup -debug www.aweb4u.co.nz. 8.8.8.8
------------
Got answer:
HEADER:
opcode = QUERY, id = 1, rcode = NOERROR
header flags: response, want recursion, recursion avail.
questions = 1, answers = 1, authority records = 0, additional = 0

QUESTIONS:
8.8.8.8.in-addr.arpa, type = PTR, class = IN
ANSWERS:
-> 8.8.8.8.in-addr.arpa
name = google-public-dns-a.google.com
ttl = 43198 (11 hours 59 mins 58 secs)

------------
Server: google-public-dns-a.google.com
Address: 8.8.8.8

------------
Got answer:
HEADER:
opcode = QUERY, id = 2, rcode = NOERROR
header flags: response, want recursion, recursion avail.
questions = 1, answers = 2, authority records = 0, additional = 0

QUESTIONS:
www.aweb4u.co.nz, type = A, class = IN
ANSWERS:
-> www.aweb4u.co.nz
canonical name = www3.iserve.net.nz
ttl = 34945 (9 hours 42 mins 25 secs)
-> www3.iserve.net.nz
internet address = 202.191.42.30
ttl = 2051 (34 mins 11 secs)

------------
Non-authoritative answer:
Name: www3.iserve.net.nz
Address: 202.191.42.30
Aliases: www.aweb4u.co.nz

From the little I know about DNS it looks to me like Vodafone's DNS failed to look up the domain name while Google's worked ok.

Can anyone offer any suggestions for anything else I can try to rule out problems at my end?

I've looked on Vodafone's forum but they're not reporting any problems and no one is complaining there.  I'm in Glenfield on Auckland's North Shore.

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19282 posts

Uber Geek
Inactive user


  # 716248 13-Nov-2012 11:14
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What modem are you using?



1836 posts

Uber Geek


  # 716250 13-Nov-2012 11:20
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johnr: What modem are you using?

Hi John, I'm using a Dynalink RTA1025W.  The PC's are connected via cable, not wirelessly.

 
 
 
 


19282 posts

Uber Geek
Inactive user


  # 716252 13-Nov-2012 11:23
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Not sure about that modem but we have seen no DNS issues

Anyone else?



1836 posts

Uber Geek


  # 716264 13-Nov-2012 11:38
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Yeah I really need to get another modem to see if that fixes it. I've got another one at home that I can bring into the office, but I won't be able to to that till tomorrow.

19282 posts

Uber Geek
Inactive user


  # 716266 13-Nov-2012 11:39
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Have you got a Vodafone HG55A modem laying about?




1836 posts

Uber Geek


  # 716269 13-Nov-2012 11:44
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johnr: Have you got a Vodafone HG55A modem laying about?


No, we were with Ihug and then migrated to Vodafone, so we never received a free modem.  I've got our old D-Link modem here, which we replaced with the Dynalink about 5 years ago, so I might dig that out and give it a try after lunch.

203 posts

Master Geek


  # 716284 13-Nov-2012 12:04
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I'm getting the same issues with a HG556a intermittently. Most NZ pages open up fine but overseas ones randomly. Happening at my house and my Mothers house both with Vodafone HG556a.

Will provide screenshot of nslookup -debug www.3ix.com 203.109.129.67 when it goes offline.





DS713+, DS210J, DS101J, LibreELEC on Intel NUC and Pi3, 3 x Echo Dot connected to Home Assistant via ha-bridge...whew


 
 
 
 


19282 posts

Uber Geek
Inactive user


  # 716286 13-Nov-2012 12:07
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xbmcnut: I'm getting the same issues with a HG556a intermittently. Most NZ pages open up fine but overseas ones randomly. Happening at my house and my Mothers house both with Vodafone HG556a.

Will provide screenshot of nslookup -debug www.3ix.com 203.109.129.67 when it goes offline.



please make sure modem is running latest software

http://forum.vodafone.co.nz/forum-19/announcement-8-23-aug-2012-new-hg556a-firmware-available/

203 posts

Master Geek


  # 716287 13-Nov-2012 12:11
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Thanks, already am.





DS713+, DS210J, DS101J, LibreELEC on Intel NUC and Pi3, 3 x Echo Dot connected to Home Assistant via ha-bridge...whew


197 posts

Master Geek

Trusted

  # 716308 13-Nov-2012 12:40
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I've got the Huawei modem and it's running the latest (because I too had the issue intermittently) but today it's back. I've had kiwiblog, google and some other links simply fail to resolve because of DNS issue. I hit refresh and they're there.

Is weird. Hope that helps.

203 posts

Master Geek


  # 716310 13-Nov-2012 12:42
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For now I've added manual DNS settings in the modem and made the 2nd address 8.8.8.8.




DS713+, DS210J, DS101J, LibreELEC on Intel NUC and Pi3, 3 x Echo Dot connected to Home Assistant via ha-bridge...whew


50 posts

Geek


  # 716320 13-Nov-2012 12:49
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I noticed the same thing last night when browsing.. was very slow the first time to load up pages and sometimes they would timeout and require a refresh.

Modem is the Vodafone HG556a with the latest firmware update..

Just assumed it was a glitch in the matrix.

BDFL - Memuneh
65301 posts

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1529 posts

Uber Geek

Subscriber

  # 716328 13-Nov-2012 12:57
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I have the same problem here in Tauranga with my Vodafone modem.  Thought it was just me, even reset my modem and restored my computer.  Glad to know its not just me




HTPC Intel Pentium G3258 cpu, Gigabyte H97n-wifi motherboard, , 8GB DDR3 ram, onboard  graphics. Hauppuage HVR 5500 tuner,  Silverstone LC16M case, Windows 10 pro 64 bit using Nextpvr and Kodi


19282 posts

Uber Geek
Inactive user


  # 716329 13-Nov-2012 12:57
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freitasm: About time to alarms to start ringing in the Vodafone HQ then...


Already doing some checks

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