Losing Web Access through browsers only
I have a computer here that almost daily will stop bringing up web sites. I've read more than I can even tell you and tried everything I could to see some rhyme or reason why this is happening. I can ping the address from a command line or the domain name. Outlook isn't affected even though it's hosted offsite. I can't access the web whether I put in the Domain name or IP in the URL field.
I've flushed the ARP cache more than once, stopped and restarted dnscache, flushed dns, scanned for trojans, malware, etc. And the only thing that will get it running again is to restart the computer or flush dns. We recently went through a DNS server change but we kept the same IP address. This also doesn't affect all the computers on the domain.
This is a Windows 7 Pro PC on a 2012 R2 domain.
I can't figure it out. I am open for ideas.
Thank you!
I've flushed the ARP cache more than once, stopped and restarted dnscache, flushed dns, scanned for trojans, malware, etc. And the only thing that will get it running again is to restart the computer or flush dns. We recently went through a DNS server change but we kept the same IP address. This also doesn't affect all the computers on the domain.
This is a Windows 7 Pro PC on a 2012 R2 domain.
I can't figure it out. I am open for ideas.
Thank you!
Your troubleshooting is exemplary and you've eliminated most of the common causes. I hesitate to suggest "hardware" in this situation, but it's a possiblity.
If it is just this one particular system, I'd image the drive from another identical system onto it, rename the system so that it matches its original name, and see if the problem persists.
If the problem persists, there's probably a hardware problem somewhere. It might be the cabling, it might be the network card, it might be the port on the switch that serves this system, it could possibly be a thermal issue somewhere in the wiring.
On the other hand, if the problem goes away, there was something peculiar in the software and you're well rid of it.
Alternatively you could swap the drive from this system into another identical system, and see if the problem follows it. Since this is W7 you can probably get away with this without new-hardware reactivation. If the problem follows the drive, it's software. If not, it's hardware.
If it is just this one particular system, I'd image the drive from another identical system onto it, rename the system so that it matches its original name, and see if the problem persists.
If the problem persists, there's probably a hardware problem somewhere. It might be the cabling, it might be the network card, it might be the port on the switch that serves this system, it could possibly be a thermal issue somewhere in the wiring.
On the other hand, if the problem goes away, there was something peculiar in the software and you're well rid of it.
Alternatively you could swap the drive from this system into another identical system, and see if the problem follows it. Since this is W7 you can probably get away with this without new-hardware reactivation. If the problem follows the drive, it's software. If not, it's hardware.
ASKER
What I may do is blow the card away in Device manager and install it from scratch. Hardware replacement may not be much of an option. I'm wondering if turning off Windows filtering would have much effect on this. I believe I saw in the event viewer where it did block a web site. Changing the ip address is short term. Restarting the PC is short term. Flushing DNS is also a band aid. External DNS probably wouldn't be much help since I can still ping the IP and dns names. It isn't that it's just blocking www, it's blocking http. I will report back on this as soon as I see any changes. Thank you
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Questioner states that the problem was resolved through his own efforts.
Set a static external DNS. e.g. 8.8.8.8
Reset your browser
Check for a browser proxy
Install another browser