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Cant get passed router with wired connection but works fine with wireless!?
Posted on 2013-01-03
Hello Experts!
I need some help. I have a problem that I can't find an answer to and I am out of answers.
I have a laptop in our company domain that is having issues with his LAN connection in our corporate office ONLY. He is not able to get to the internet when connected in the office but the LAN connection works fine on every other outside network we have tried it on. I have taken the laptop home and tested it and it works fine. Also we have tested it in hotels and there is not LAN issues. BUT the odd thing is that the wireless connection works PERFECTLY all the time, even in the corporate office. This computer NEVER had a issue until randomly it stopped working, it just doesnt make sense. This is the only computer that is having an issue in our office. Below is what I have tried to make it work.
- Pinging Google.com via IP address
- Different ethernet cable(s) and ports
- Uninstalled/reinstalled new drivers
- Turned off firewall
- ipconfig/release, renew, flushdns, registerdns
- Set a static ip/subnet mask/dns/gateway
- Virus scan (malwarebytes)
- Checked for IE proxy
- Reinstall Windows 7
There maybe a couple other things i tried but just cant remember at this time. Any help would be great!
I need some help. I have a problem that I can't find an answer to and I am out of answers.
I have a laptop in our company domain that is having issues with his LAN connection in our corporate office ONLY. He is not able to get to the internet when connected in the office but the LAN connection works fine on every other outside network we have tried it on. I have taken the laptop home and tested it and it works fine. Also we have tested it in hotels and there is not LAN issues. BUT the odd thing is that the wireless connection works PERFECTLY all the time, even in the corporate office. This computer NEVER had a issue until randomly it stopped working, it just doesnt make sense. This is the only computer that is having an issue in our office. Below is what I have tried to make it work.
- Pinging Google.com via IP address
- Different ethernet cable(s) and ports
- Uninstalled/reinstalled new drivers
- Turned off firewall
- ipconfig/release, renew, flushdns, registerdns
- Set a static ip/subnet mask/dns/gateway
- Virus scan (malwarebytes)
- Checked for IE proxy
- Reinstall Windows 7
There maybe a couple other things i tried but just cant remember at this time. Any help would be great!
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9 Comments
Start again with setting a static IP on the PC that is verified not being used. Then do ping tests to the local Vlan gateway, then to some other internal IP outside the Vlan, then try the Proxy IP, then finally try an Internet IP like 4.2.2.1 (AT&T DNS) or 8.8.4.4 (Google DNS). Where it fails at will give a good indication as to where the problem is. If it fails immediately to the Vlan GW, then recheck the IP settings and possibly have the local network guys check for a stuck incomplete ARP entry that can be cleared. Post all results. Thanks
Active today
Or you can temporary connect an external NIC for testing purposes. But I would check the ACL on your office switch first. Maybe even look within Windows and check the TCP/IP settings for that particular network. What type of policies exist on the corporate network?
If the LAN ports don't work then the switch(es) that serve those might need to checked. They may not be setup with a default GW. Check that. Without some more detailed information I am afraid we are just guessing yet.
Active today
As asked by upalakshitha, did you try a completely different switch if possible? Not just a different port in the same switch.
We found the answer!
It turns out that there were to separate problems.
1) There was a set static pubic DNS address in the TCP/IP properties. Reset the DNS address to automatic.
2) DHCP had a problem with the address it gave the computer. I removed the entry from DHCP and from the DNS server. A new address was given to the computer thus ending problem accessing the Internet.
Thanks for all the suggestions.
It turns out that there were to separate problems.
1) There was a set static pubic DNS address in the TCP/IP properties. Reset the DNS address to automatic.
2) DHCP had a problem with the address it gave the computer. I removed the entry from DHCP and from the DNS server. A new address was given to the computer thus ending problem accessing the Internet.
Thanks for all the suggestions.
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