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Cannot access som websites from some computers

Hi.
In my office I have 1 mac and 2 pc's.
Mac with Safari and Firefox installed
1 pc with XP and IE 8, and 1 pc with Win 7 and IE9+ Firefox

Today I found that mac and Win 7 pc cannot access some webpages (experts-exchange.com, www.equinux.com ++)

Can access all websites from XP pc.

Had to download vpntracker on the xp pc and copy to Mac to install. But cannot activate VPN tracker since it cannot reach www.equinux.com...

All machines are on same Lan, uses same DHCP+ DNS.
restarted all machines, no hlep..
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Tore Jacobsen
Asked:
Tore Jacobsen
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2 Solutions
 
torvirCommented:
Can you ping www.experts-exchange.com from command-line on the win7 or mac ?
Do you get the name resolved into an IP-address as you try?
If you don't, can you ping 64.156.132.140  ?
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WBGamesCommented:
Delete Cookies n stuff.
ipconfig/flushdns  then /renew.

And ya try to ping the website.

Get back to us with the output :)
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Tore JacobsenSystem adminstratorAuthor Commented:
Can ping url and ip. Installed Firefox on Win7, same problem.. Think it might be something with our new dsl line, but strange that it's only on some computers...
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WBGamesCommented:
did you do flushdns ?
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torvirCommented:
Next step is to do a telnet to tcp port 80.
Try this from Win7 (you might have to install telnet) or Mac:

telnet www.experts-exchange.com 80

If you are connected, try type

GET

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Tore JacobsenSystem adminstratorAuthor Commented:
Upgraded firmware on firewall and changed DNS lookup servers on local DNS server and now workes fine..
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