unable to access external sites

Hello  team




I have multiple users here in one of my sites who can’t access external sites (vendor sites, google, etc.)




One of my resources in Networking says this is not a network issue as users can ping external websites. They just won’t show up in either Chrome or IE.




Any ideas?




Windows 2008 forest/domain functional level, WIndows 7/8 machines, a single forest single domain, no changes applied to our infrastructure




Multiple DNS, DCs, all WIndows 2008, users at other sites are ok
Jerry SeinfieldAsked:
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William FulksSystems Analyst & WebmasterCommented:
If your network people say it's not an internal problem (which they do often say when it really IS) then you may want to contact your ISP and see if something is going on.
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Fred MarshallPrincipalCommented:
You say: "multiple users" but not "all users".  That makes a difference.  Which is it?

Presumably these *same* users are the ones who can ping the web page IP addresses or URLs.  Is that right?  (And not just any computer (which may be working)).

This is odd behavior but sometimes happens without any good way to figure it out.  
Sometimes this can happen when a router needs a reboot.  So, I'd certainly try that.
A web filter or firewall settings could cause it but that's not as likely.
A separate path to the web page could cause it (where there's some filter or firewall difference).

What does a traceroute to the URL look like?
What does a traceroute to the IP address look like:?
Compare these two between "good" machines and "failing" machines.
Let us know.
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CompProbSolvCommented:
You could separate AD/DNS/DHCP issues from internet access issues by setting up a machine temporarily with a good static IP address, offsite DNS (such as 4.2.2.2), on a workgroup (not on AD), and connect it directly to your router.  If that can get to the internet properly then it is likely not an issue with the ISP.

Otherwise, Fred has some excellent questions and comments above.
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