Verizon Users Can't See Site

[Torsten]

Am Tue, 14 Sep 2010 05:15:16 +0000 (UTC)
schrieb cyberseal at comcast.net:

> 
> 
> 
> Hello List, 
> 
> 
> 
> I've run into an issue that has me stumped for the time being. I'm
> working on a website that is hosted on a delegated subdomain. The
> site is www-mbclive.mbc.irides.com. The mbc.irides.com subdomain is
> delegated to two Barracuda load balancers known as
> dns1.mbc.irides.com and dns2.mbc.irides.com. 
> 
> 
> 
> DNS seems to work fine for the majority of our users, however, in the
> past week we've heard from many Verizon FIOS users that they are
> unable to visit the site due to resolution issues. One sent in a dig
> from his home computer and I was wondering why he doesn't receive an
> answer: 
> 
> 
> 
> scott$ dig @71.252.0.12 www-mbclive.mbc.irides.com 
> 
> ; <<>> DiG 9.6.0-APPLE-P2 <<>> @71.252.0.12
> www-mbclive.mbc.irides.com ; (1 server found) 
> ;; global options: +cmd 
> ;; Got answer: 
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62184 
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 
> 
> ;; QUESTION SECTION: 
> ;www-mbclive.mbc.irides.com.    IN      A 
> 
> ;; AUTHORITY SECTION: 
> www-mbclive.mbc.irides.com. 10  IN      SOA     dns1.mbc.irides.com.
> 1. 3600 3600 3600 3600 3600 
> 
> ;; Query time: 20 msec 
> ;; SERVER: 71.252.0.12#53(71.252.0.12) 
> ;; WHEN: Mon Sep 13 21:31:08 2010 
> ;; MSG SIZE  rcvd: 86 
> 
> 
> 
> Can anyone tell if there is a DNS issue on our end that may cause us
> to not play nice w/ Verizon? This issue just popped up in the last
> two weeks. Prior to that time visitors were not complaining. Any
> assistance is greatly appreciated. 
> 

I'm having troubles getting an answer from both dns1.mbc.irides.com and
dns2.mbc.irides.com for www-mbclive.mbc.irides.com.

A dig query freezes for about 12 seconds before returning an answer.
Maybe there's a problem with a misconfigured firewall.

[ts at localhost ~]$ traceroute -q 1 dns2.mbc.irides.com
traceroute to dns2.mbc.irides.com (209.252.251.240), 30 hops max, 60
byte packets 1  10.43.64.254 (10.43.64.254)  0.336 ms
 2  vl67.cr30.isham.de.easynet.net (194.64.6.252)  0.927 ms
 3  ge1-5.br2.isham.de.easynet.net (194.64.4.126)  0.695 ms
 4  ge3-0-2.gr10.isham.de.easynet.net (87.86.71.244)  0.632 ms
 5  te2-0-0.gr10.ixfra.de.easynet.net (87.86.77.95)  9.862 ms
 6  ge-5-1-4.edge3.frankfurt1.level3.net (212.162.40.77)  9.964 ms
 7  vlan79.csw2.Frankfurt1.Level3.net (4.68.23.126)  18.392 ms
 8  ae-72-72.ebr2.Frankfurt1.Level3.net (4.69.140.21)  10.387 ms
 9  ae-41-41.ebr2.washington1.level3.net (4.69.137.50)  98.620 ms
10  ae-5-5.ebr2.washington12.level3.net (4.69.143.222)  101.159 ms
11  ae-6-6.ebr2.chicago2.level3.net (4.69.148.146)  113.618 ms
12  ae-22-52.car2.chicago2.level3.net (4.69.138.165)  115.322 ms
13  paetec-comm.car2.chicago2.level3.net (4.71.250.34)  115.955 ms
14  gi-3-1-0.core01.chcgil01.paetec.net (66.155.191.97)  139.525 ms
15  po-4-0-0.core02.rochny01.paetec.net (64.80.253.217)  137.915 ms
16  gi-6-0-0.edge02.rochny01.paetec.net (66.155.216.183)  140.368 ms
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Ciao
Torsten


> 
> 
> Thanks, 
> 
> 
> 
> Brad