Internet down but have net connectivity and valid ip address

[lunar]

Internet is down saying that it cannot display the page but I have net connectivity because email (outlook) works and all my mapped drives work. I'm getting an valid ip address. 172.16.2.x. Our company network does not
allow us to ping external ip addresses either. So, I can't do ping tests.

When I put in an ip address of say msn or yahoo, I get the same error. So, I'm kinda ruling out dns. funny thing is, the problem seems to jump from pc to pc. One day one user will get this problem, next day the same
user/pc will be fine but another user will inherit the problem.

This is happening on 2k, and xp pc's. Not to nt boxes, at least not yet.
I've installed netscape, mozilla, cleared temp internet files on IE too.

When I release the ip from dhcp and the pc gets a new ip address or if i set a static ip, the problem goes away. But like I said, it'll jump to another pc. And sometimes, the problem will jump back to the original user that now has a new ip address.

Here's how our dns works.

dhcp assigns the ip and the dns server. Our internal dns server points to our ISP's (AT&T) DNS servers that does our DNS. I can ping my internal DNS servers fine when this happens. And this is happening to 1-2 pc's at a time and not to all our pc's.

Also, I can get to our company's web page but not to anywhere else. When I type in a webpage, its says it connecting to 207.68.171.245 (msn) but I never get the web page and eventually it'll say can't display the page.

don't think its a hardware problem (client pc, hubs, routers) because after I give it a new ip address the problem goes away.

Is it something with our dhcp server but I can't find any knowledge base on this particular problem. We've restarted the dns and dhcp services to no avail.

[vass0922]

see if you can go to http://64.233.187.104

dont' worry its just google

See if you can ping www.google.com

Whether or not you can actually ping the server isn't important, but more important is if you can resolve the IP


--- edit ---
n/m just saw you can resolve msn

it maybe your companies proxy server, best bet is to call them

[theactor1977]

mmmm, sounds like an http ip is needed

[theactor1977]

try to find out if you need an http ip address to log on the server

[Sixpac_XP]

Are you using a proxy server at all?

[Siliconjunkie]

Just because you have an IP, particularly in a work enviroment, getting a valid IP is not dependent on the Internet side of things being up, particularly with a private range like you are getting.

[lunar]

nope can't get to http://64.233.187.104 either.

and not using a proxy server.

I'm pretty certain I'm getting net connectivity because I can send and receive emails.

[Siliconjunkie]

Sounds like your browser is hijacked, but I am not sure how you are getting here then.

Double check network settings too, I have seen some spyware lately that replaces your DNS settings.

[Sixpac_XP]

Try another computer in your network.. it may be your own computer that is having problems.

[lunar]

the problem happens to more than 1 computer. It jumps from user to user. My computer's fine. And an ipconfig /all shows shows the correct dns settings.