[SOLVED] Unable to connect to the Internet

[krourya]

I'm unable to connect to the internet & browse websites even though the status of the Internet Connection (those 2 monitors in the system tray) shows connected. I have a broadband modem which is connected to the Wireless Router (DLINK) (WAN) which in turn is connected to the PC(LAN). I tried connecting the broadband modem directly to the PC, it shows Limited Connectivity & I'm unable to browse.

I'm able to ping my ip, but not able to ping any website. I tried assigning an IP under the TCP/IP properties.

Additional Info: I used to get an error msg whenever I tried to repair the connection "Unable to clear ARP cache". I cleared the ARP cache but it still didn't work. Then I disabled Routing and Remote access under Administrative tools,Services. Now, when I repair the connection, I get the error message "Unable to renew IP address" And oh yes, I'm running on XP SP2.

I am able to get the IP when I do a ipconfig/all and hence I'm able to connect to the router management.

I have tried unplugging and plugging the cables as well.

I'd be extremely grateful if someone tells me how to resolve this.

[johnwill]

Please supply the following info, exact make and models of the equipment please.

Name of your ISP (Internet Service Provider).
Make and exact model of the broadband modem.
Make and exact model and hardware version of the router (if a separate unit).
Model numbers can usually be obtained from the label on the device.
Connection type, wired or wireless.
If wireless, encryption used, (none, WEP, WPA, or WPA2)
Version and patch level of Windows on all affected machines, i.e. XP (Home or Pro), SP1-SP2-SP3, Vista (Home, Business, Ultimate), etc.
The Internet Browser in use, IE, Firefox, Opera, etc.




Please give an exact description of your problem symptoms, including the exact text of any error messages.

• If you're using a wireless connection, have you tried a direct connection with a cable to see if that changes the symptoms?
• For wireless issues, have you disabled all encryption on the router to see if you can connect that way?
• Have you connected directly to the broadband modem to see if this is a router or modem/ISP issue?
• If there are other computers on the same network, are they experiencing the same issue, or do they function normally?

On any affected computer, I'd also like to see this:

Hold the Windows key and press R, then type CMD (COMMAND for W98/WME) to open a command prompt:

Type the following commands on separate lines, following each one with the Enter key:

PING 206.190.60.37

PING yahoo.com

NBTSTAT -n

IPCONFIG /ALL

Right click in the command window and choose Select All, then hit Enter.
Paste the results in a message here.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.

[krourya]

Hi johnwill, here are some of the particulars:-

Make and exact model of the broadband modem: SmartAX MT882
Make and exact model and hardware version of the router (if a separate unit): DLINK WBR 1310
Connection type, wired or wireless: Both
If wireless, encryption used, (none, WEP, WPA, or WPA2) : WPA2
Version and patch level of Windows on all affected machines, i.e. XP (Home or Pro), SP1-SP2-SP3, Vista (Home, Business, Ultimate), etc: WinXP SP2, 32-Bit
The Internet Browser in use, IE, Firefox, Opera, etc: IE/Firefox

I disconnected the router and connected the broadband model directly to my computer-LAN, assigned an IP and the connection worked just fine. I strongly believe it is an issue with the router. I reset the router twice and also disabled any encryption. Neither am I able to access internet if it's wired nor wireless.

As of now, I'm back to the plain old wired connection from the broadband.

Results from the ping

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Bhima>PING 206.190.60.37

Pinging 206.190.60.37 with 32 bytes of data:

Reply from 206.190.60.37: bytes=32 time=297ms TTL=54
Reply from 206.190.60.37: bytes=32 time=297ms TTL=54
Reply from 206.190.60.37: bytes=32 time=298ms TTL=54
Reply from 206.190.60.37: bytes=32 time=297ms TTL=54

Ping statistics for 206.190.60.37:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 297ms, Maximum = 298ms, Average = 297ms

C:\Documents and Settings\Bhima>Ping yahoo.com

Pinging yahoo.com [68.180.206.184] with 32 bytes of data:

Reply from 68.180.206.184: bytes=32 time=583ms TTL=54
Reply from 68.180.206.184: bytes=32 time=583ms TTL=54
Reply from 68.180.206.184: bytes=32 time=579ms TTL=54
Reply from 68.180.206.184: bytes=32 time=576ms TTL=54

Ping statistics for 68.180.206.184:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 576ms, Maximum = 583ms, Average = 580ms

C:\Documents and Settings\Bhima>NBTSTAT -n

Local Area Connection 2:
Node IpAddress: [192.168.1.100] Scope Id: []

NetBIOS Local Name Table

Name Type Status
---------------------------------------------
KRSNA <00> UNIQUE Registered
MSHOME <00> GROUP Registered
KRSNA <20> UNIQUE Registered
MSHOME <1E> GROUP Registered
MSHOME <1D> UNIQUE Registered
..__MSBROWSE__.<01> GROUP Registered

[johnwill]

Let's go back to the router connected, since this tells me nothing.


Reset the router to factory defaults by holding the reset button down for 15 seconds with power on. The following procedure should get you a connection with any broadband modem that is configured to use DHCP for the router connection, such as cable modems, and many DSL modems. If you require PPPoE configuration for the DSL modem, that will have to be configured to match the ISP requirements.

• Turn off everything, the modem, router, computer.
• Connect the modem to the router's WAN/Internet port.
• Connect the computer to one of the router's LAN/Network ports.
• Turn on the modem, wait for a steady connect light.
• Turn on the router, wait for two minutes.
• Boot the computer.

When the computer is completely booted, let's see this.

Hold the Windows key and press R, then type CMD (COMMAND for W98/WME) to open a command prompt:

In the command prompt window that opens, type type the following commands one at a time, followed by the Enter key:

IPCONFIG /ALL

PING <computer_IP_address>

PING <default_gateway_address>

PING <dns_servers>

PING 206.190.60.37

PING yahoo.com

Right click in the command window and choose Select All, then hit Enter to copy the contents to the clipboard.
Paste the results in a message here.

<computer_IP_address> - The IP Address of your computer, obtained from the IPCONFIG command above.

<default_gateway_address> - The IP address of the Default Gateway, obtained from the IPCONFIG command above.

<dns_servers> - The IP address of the first (or only) address for DNS Servers, obtained from the IPCONFIG command above.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.

[krourya]

Followed the procedure suggested above, here are the results..

IP Address. . . . . . . . . . . . : 192.168.0.100
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1


Pinging 192.168.0.100 with 32 bytes of data:

Reply from 192.168.0.100: bytes=32 time<1ms TTL=128
Reply from 192.168.0.100: bytes=32 time<1ms TTL=128
Reply from 192.168.0.100: bytes=32 time<1ms TTL=128
Reply from 192.168.0.100: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.0.100:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms


Pinging 192.168.0.1 with 32 bytes of data:

Reply from 192.168.0.1: bytes=32 time<1ms TTL=127
Reply from 192.168.0.1: bytes=32 time<1ms TTL=127
Reply from 192.168.0.1: bytes=32 time<1ms TTL=127
Reply from 192.168.0.1: bytes=32 time<1ms TTL=127

Ping statistics for 192.168.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

Pinging 206.190.60.37 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 206.190.60.37:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Documents and Settings\Bhima>ping yahoo.com
Ping request could not find host yahoo.com. Please check the name and try again.

**Additional Information** I can connect to the internet from the modem, connected directly to the PC, only when I assign an IP. If I select Obtain IP automatically, then I'm unable to connect.

[johnwill]

Well, for the test above I wanted the computer configured for automatic addressing. Also, I wanted the IPCONFIG /ALL output.

Next, I'd like to see an IPCONFIG /ALL when connected directly to the modem.

One issue here seems to be that the router and the "modem" are on the same base subnet.

[krourya]

Hurray!!!! I'm connected!!!

I tried automatic addressing and it didn't work. I'm not sure why though. I then played around with the TCP/IP Settings a little and also with the connection.

Below are the steps I took to rectify the situation:
1. Connected the broadband modem to the LAN port on the router. Basically, nothing is connected to the WAN port now.
2. Assigned IP / DNS

IPCONFIG/ALL output---
IP Address : 192.168.0.5
Subnet Mask : 255.255.255.0
Default Gateway: 192.168.0.1
Prefered DNS : 192.168.0.1
Alternate DNS : 4.2.2.1

3. PING the IP / Default Gateway->Successful
4. Opened the router management and deselected Enable dhcp

Since I get connected to the net without a user id/pwd, I read somewhere that dhcp should not be enabled.

I'm now able to access internet both wired/wireless.

[johnwill]

You need to disable the DHCP server on the D-Link router, since it's going to interfere with the other one. DHCP should be enabled on the workstations.

Here's how to connect a secondary router, your "modem" is a modem/router.


Connecting two (or more) SOHO broadband routers together.

Note: The "primary" router can be an actual router, a software gateway like Microsoft Internet Connection Sharing, or a server connection that has the capability to supply more than one IP address using DHCP server capability. No changes are made to the primary "router" configuration.

Configure the IP address of the secondary router(s) to be in the same subnet as the primary router, but out of the range of the DHCP server in the primary router. For instance DHCP server addresses 192.168.0.2 through 192.168.0.100, I'd assign the secondary router 192.168.0.254 as it's IP address, 192.168.0.253 for another router, etc.

Note: Do this first, as you will have to reboot the computer to connect to the router again for the remaining changes.

Disable the DHCP server in the secondary router.

Setup the wireless section just the way you would if it was the primary router, channels, encryption, etc.

Connect from the primary router's LAN port to one of the LAN ports on the secondary router. If there is no uplink port and neither of the routers have auto-sensing ports, use a cross-over cable. Leave the WAN port unconnected!

This procedure bypasses the routing function (NAT layer) and configures the router as a switch (or wireless access point for wireless routers).

For reference, here's a link to a Typical example config using a Netgear router

[krourya]

Thank you johnwill. I've saved the suggestions so that I don't have to seek help when I mess up my network again.

The link surely helps.

Thanks a lot