Suddenly lost internet connection on network

Suddenly lost internet connection on network.
The router gives internet as I get internet from the router wireless.
Change switch
Changed network cable
Disabled and enabled network card
Changed the obtain automatically obtain IP
Tried using a different network card and computer.
Ren cmd netsh int ip reset c:\resetlog.txt
Restarted the server.

Yet another issue, Can’t get access to the router from a browser with the router IP.
Used ipconfig used the default gateway in the browser
Already changed router

Please help I am out of ideas
Abraham DeutschIT professionalAsked:
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FOXActive Directory/Exchange EngineerCommented:
Have you called your internet service provider?
Abraham DeutschIT professionalAuthor Commented:
Should I? I am getting from this same router wireless internet.
Also other networks are getting Internet from the same modem on other IP address (has 4 static IP) with no issue
FOXActive Directory/Exchange EngineerCommented:
So all of these issues are just from one workstation?
from an elevated command prompt

netsh winsock reset
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The router gives internet as I get internet from the router wireless.

Not sure I understand this.
Do you mean that you CAN get internet wirelessly, but NOT wired?
If so, have you tried connecting DIRECTLY into the router (via network cable)?

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FOXActive Directory/Exchange EngineerCommented:
Are you telling me even with another computer plugged directly in to the switch you could not get on the internet and the wireless is working?  
If you can't get in to the router via a browser with IP, you may have to plug a laptop directly in to the router and verify LAN is still turned on.  It seems that it is off.
JohnBusiness Consultant (Owner)Commented:
I agree with the first suggestion about ISP. I suggest you plug a computer directly to the modem by Ethernet and test.  Call the ISP with this configuration and explain the issue. Have them test the modem and perhaps reset it.
Abraham DeutschIT professionalAuthor Commented:
Correct I can get wireless
At the time I set up the new router I was able to connect with a cable directly to the router but now I can't.
I will call the Internet service provider.
Bryant SchaperCommented:
ok, so the router is getting internet, but the devices on a specific subnet are not, this sounds like firewall, or network config, confirm your IP address, subnet and gateway along with your dns server.  Try pinging as well, it is a google public DNS and should respond.
Abraham DeutschIT professionalAuthor Commented:
The IP and DNS are set to obtain automatically

I did not make any changes on the server firewall

I pinged And the router IP both responded "transmit failed. General failure"
Bryant SchaperCommented:
so either the gateway is wrong your PC is, can you hit other stuff on the network from that machine?
Just to confirm, are the modem and router two physically separate devices, or one device?

Also, the server you mention, is that a Windows server?  I take it it's connected straight into the switch?
Abraham DeutschIT professionalAuthor Commented:
Physically two separate devices
Direct in the switch

I will test if I can reach other devices on the network.

PS I see my ISP working on the street. But since the other networks on the same modem have Internet. I wonder if its related.
At the time I set up the new router I was able to connect with a cable directly to the router but now I can't.

Assuming that you are only using ONE router, connected to the modem, and it's THAT router that is giving wireless but not wired (for some reason), I would focus on sorting that out first (if possible, if no one else is using the network, I might even disconnect the router from the switch, until you sort out the connection problem?)
Bryant SchaperCommented:
what kind of hardware are we using?
Abraham DeutschIT professionalAuthor Commented:
No one else is using the network

Will unplug it from the modem and see if I can connect

I used a TP-link router I replaced it with a sonicwall
Bryant SchaperCommented:
so your computer is on the same subnet/network as the sonicwall/tp-link?  Can it see those devices?
Abraham DeutschIT professionalAuthor Commented:
When I ping it I get a reply "transmit failed. General failure"
JohnBusiness Consultant (Owner)Commented:
Have you had the ISP check these boxes?
Bryant SchaperCommented:
so you cant even ping the inside interface of the router.

I suspect two things:

1.  Wrong IP on the client
2.  Bad network cable

Can you try another machine?

At a bare minimum you should be able to ping the tp-link or sonicwall, without I strongly would doubt ISP issues.
Abraham DeutschIT professionalAuthor Commented:
Originally I had the to-link when the trouble started so I suspected the router so I replaced it with the sonicwall

I changed the cables additionally I tried with a laptop directly to the router

I replaced the switch

Is set to obtain automatically
Bryant SchaperCommented:
can you try another machine?

What IP is on the inside interface of the router and what IP did the computer get?

If I'm interpreting correctly, what Bryant is getting at, is the minimum of what you should be able to do.  The link between the router and PC/laptop.  I wouldn't concentrate on anything else.
I cannot see it being an ISP problem either.
The switch is located between the computer and the router-  correct?  
I would take the switch out of the equation for the time being.
Also, do NOT unplug the modem from the router.
web_trackerComputer Service TechnicianCommented:
Does your network system permit the use of routers? Our network blocks the use of routers automatically.   Maybe a setting in the router is set to permit certain device mac addresses and is blocking other device from passing through the router. As this is the way I setup my router, as this prevents unknown devices from hacking into my router and stealing my bandwith, also it prevents devices from snooping in my network.
Bryant SchaperCommented:
How do you block other routers?  More curious, wouldn't just appear as another computer?  I guess lack of a route on the other router could pose a problem, but a simple nat on the inside router would make that not matter
JohnBusiness Consultant (Owner)Commented:
Many modems you need to put into Bridge Mode to add an inboard Router. But I assume that would have been done by the ISP already.
Bryant SchaperCommented:
yes, and from my understanding, we lose connectivity between the internal router and a specific subnet but other subnets on the same router work.

So I think firewall, NAT, DNS or something along that line.
Bryant SchaperCommented:
you ever feel like these would be quick and easy if you were onsite
Abraham DeutschIT professionalAuthor Commented:
Sorry for delay in my respond I was not on site and could not connect remotely as there is no internet

See attached

Server is a ipconfig from the server
Router is a snap I took when I originally set up the router
Wireless is ipconfig from the laptop getting wireless internet from the router
Changed server. I changed the server configurations to

“You may have to plug a laptop directly in to the router”
Connected laptop to the router, but can’t get in to the router see attached
web_trackerComputer Service TechnicianCommented:
If you cannot connect into the router with this computer to get a 192..... ip address and are getting a 169.... ip this definitely is indcating it is not communicating with the router.  Which means either the firewall of the sonic wall is blocking the computer, you are using a bad network cable (even if you changed it with a new cable try another one, even new cables have been known to be faulty from the manufacturer), or maybe a bad network card. You said you swapped out the network card, did you update the drivers for the new card? Flushing the dns or restarting the computer also are some things users forget to try but obviously you have already. Try plugging in the latop hard wired into the router with the wireless turned off, see if the laptop has the same issue when hard wired.
JohnBusiness Consultant (Owner)Commented:
Try plugging in the laptop hard wired into the router with the wireless turned off

That was suggested 48 hours ago. I am not sure why it was not tried. It is the VERY first thing I test.
Abraham DeutschIT professionalAuthor Commented:
I want to thank you all for your help till now I am getting close to solve the issue

The tp-ling router seems to be dead
The sonicwall I reconfigured it by reserting it and I got internet.

the reason I could not connect to the router is related to the router not yet sure what see image 1 it starts to connect then see image 2 and 3 it fails to connect. please help

PS I tried to connect with a  crossover cable as thy recommend no success. also tried using a machine that has no antivirus installed (kaspersky) no success.
JohnBusiness Consultant (Owner)Commented:
So then replace the boxes that are not working.
Abraham DeutschIT professionalAuthor Commented:
The sonicwall give Internet by now. Could not yet figure out how to connect to the routers interface. See images attached in previous post
Those images take you to a secure logon page for some reason?
Abraham DeutschIT professionalAuthor Commented:
When I enter in the browser the ip of the router this is what happens.
Abraham DeutschIT professionalAuthor Commented:
In Firefox I got a little more details seer attached
What's the model number of the sonicwall?
Abraham DeutschIT professionalAuthor Commented:
Just to confirm:

"The tp-ling router seems to be dead
The sonicwall I reconfigured it by reserting it and I got internet. "

"The sonicwall give Internet by now"

Do you have WIRED internet through the Sonicwall router?
Abraham DeutschIT professionalAuthor Commented:
Are you trying to access the Sonicwall config page, in order to setup wireless (or do you already have WIRELESS internet on your laptop)?

Or have you now resolved the issues you had?
Abraham DeutschIT professionalAuthor Commented:
Issue solved

I reconfigured the settings on the router and got internet
Why it gave wireless and not wired I think thy run differently on the router so even with some some misconfigurations  the wireless may work but not wired.

The reason of not being able to log in to the router since sonicwall uses a self-sign certificate, the browser looks on it as a not trusted connection an blocks it. I logged in from a older version of IE updated the firmware downloaded the certificate and installed it in the trusted root so I could access it from any browser on the computer/server.

Before call the ISP since the same modem gave internet to other IP addresses, and I connected a laptop directly to the modem and configured the IP settings according to the ISP setting and I got internet, so I verified it is not the ISP issue.

I really appreciate you help, and thank you all.
JohnBusiness Consultant (Owner)Commented:
Thank you for the update and I was happy to help.
Although it pays to be open-minded with issues like this, I was pretty certain it wasn't an ISP issue (and you discovered that one yourself).
With regards to the wired/wireless issue with the router, I've seen strange things like this before (and usually a simple reset of the router does the trick).

Anyway, glad to see it all sorted now!
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