<div>
Do you use a proxy?<br />
<br />
Are these sites all on the same subnet?<br />
<br />
What error message do you get when the site doesn't display?
</div>


<div>
What does &quot;No matter what browser I use I am not able to get the site up.&quot; mean?<br />
<br />
Have used nslookup, ping, traceroute/tracert on those machines? Have those machines special firewalls settings or default proxies for the browser?
</div>


<div>
Can you access the sites by IP?<br />
<br />
Are you using residential or business class internet service?<br />
(port blocking may be in play)<br />
<br />
Do you have a firewall that could be blocking traffic?
</div>


<div>
@paulmacd<br />
No Proxy, Subnets are all different, Error &quot;This Page Can't be displayed&quot;<br />
<br />
@Ste5an<br />

<blockquote>
No matter what browser I use I am not able to get the site up
</blockquote>
Means IE, Firefox and Chrome all are unable to bring the site up. &nbsp;They all error out. &nbsp;<br />
<br />

<blockquote>
steps taken so far.<br />
<br />
•NSLOOKUP from my machine resolved successfully <br />
•PING site successfully<br />
•MXTOOLBOX site resolved the same results as my nslookup<br />
•Successfully got to the site from a mobile device off the network<br />
•Used a Proxy Server website and resolved successfully
</blockquote>
<br />
You are asking questions that I have already put up 
<blockquote>
Have used nslookup, ping, traceroute/tracert on those machines
</blockquote>
TraceRT resolved nothing<br />
No Firewalls<br />
<br />
@kenfcamp<br />
Unable to get the sites up via IP either<br />
Commercial level ISP (Cogent 100 MB up/down)<br />
ASA Firewall is not blocking the sites
</div>


<div>
what are you hosting on? (Windows, Linux, etc)<br />
<br />
I'm sure you have, but I have to ask. Have you verified your HTTPD service is running?<br />
<br />
Have your checked your logs for errors?
</div>


<div>
Had similar issue the other day. We have 2 isp's and going thru our main isp we could not get to a certain site. We routed traffic for just this one site thru our second isp and worked fine. This was done by our sonic-wall. Next day before calling main isp I did some testing and for what ever reason it was working. <br />
Also another site was acting the same way but cleared itself as well later on. <br />
I never was able to confirm but seems as if our isp was to blame.
</div>


<div>
I called my ISP and they were able to successfully access the site. &nbsp;<br />
So I chalked it up to something in my system, but it could be an ISP issue.<br />
Who do you use?
</div>


<div>
LightTower is the one giving us the issue and it just happened again, same site too. &nbsp;We have Cablevision as well so from our SonicWall I redirected traffic for that site out that port. With them no issue. &nbsp;So its deff outside our network.
</div>


<div>
I found the answer to my issue.
</div>


<div>
<div class="content wysiwyg-content">
I have a weird one I cannot pin point. &nbsp;I have three sites that users are trying to get to via my network.<br />
No matter what browser I use I am not able to get the site up.<br />
<br />
steps taken so far.<br />

<div class="indent">
<ul>
<li>NSLOOKUP from my machine resolved successfully </li>
<li>PING site successfully</li>
<li>MXTOOLBOX site resolved the same results as my nslookup</li>
<li>Successfully got to the site from a mobile device off the network</li>
<li>Used a Proxy Server website and resolved successfully</li>
</ul>
</div>
<br />
Are there any DNS Server logs or debugging method that I can use to try and isolate the cause.
</div>
</div>


I have a weird one I cannot pin point.  I have three sites that users are trying to get to via my network.
No matter what browser I use I am not able to get the site up.

steps taken so far.
NSLOOKUP from my machine resolved successfully 
PING site successfully
MXTOOLBOX site resolved the same results as my nslookup
Successfully got to the site from a mobile device off the network
Used a Proxy Server website and resolved successfully


Are there any DNS Server logs or debugging method that I can use to try and isolate the cause.

Weird Internet Browser issue for three Sites

The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries, organized in abstraction layers, traditionally called "Link," "Internet," "Transport" and "Application”. Its routing function enables internetworking, and essentially establishes the Internet. IP defines packet structures that encapsulate the data to be delivered. It also defines addressing methods that are used to label the datagram with source and destination information.

Internet Protocols

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Web browsers are applications used primarily to display documents, files and media from the Internet, identified by a Uniform Resource Identifier (URI) that can be a page, image, video or other file. Some browsers require the use of add-ons or extensions to safely render the information they receive; others have systems built into them to perform the same functions.

Web Browsers

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.