I am getting answers which I do not understand?

Question

I have a network consisting of a server, a speeedstream 4100 modem, a linksys router, a linksys ethernet switch, and six dell computers running XP Pro. My internet provider is ATT/Yahoo.
My home page setting on the computers is Yahoo.

Five of the computers can connect with the internet.

All of the computers can connect with the network.

I cannot figure out why the one computer will not connect with the internet.

My understanding of all of this is limited.

My answers contain such things as follows, which I do not understand:
MAC address filtering HOW AND WHERE
IP address filtering HOW AND WHERE
DHCP server HOW AND WHERE
ipconfig HOW AND WHERE
firewall setting HOW AND WHERE
tcp/ip corruption HOW AND WHERE

Also, could this happen because my modem is not in bridge mode? I have some information stating that my modem should be in bridge mode (with the internet light off) or some sort of interference or conflict could occur. Could this be a factor?

Answer 1

MAC address filtering - this is in your linksys router - if you did not set this up in there originally it's not a default setting - check your router manual at www.linksys.com

IP address filtering - this is in your linksys router - if you did not set this up in there originally it's not a default setting - check your router manual at www.linksys.com

DHCP server - if all your computers can see eachother - this is a non issue don't worry about it you have an IP address.

Firewall setting - this is in your windows control panel - start-settings- control panel - windows firewall

TCP/IP corruption - possible but highly unlikely since you can get to other machines on your network.

For IPConfig - this is the information we really need to solve this problem

Go to Start- Run and type CMD

at this point type "ipconfig /all"

What you are concerned about when looking at this primarily is that the default gateway address (numbers) should look identical on the working and non working machine. The other thing to make sure is filled and working correctly is the DNS Server addresses (numbers) should be identical on the working and non working machines.

After you have this information we can help you further.

Answer 2

has nothing to do with your modem since the other 5 work fine.

first make sure the status lights on your NIC and the hub/switch/router you have the PC plugged in to both show a connection (green light usually)

then see if you can Ping to and from a working PC and the problem PC. On the problem PC go to Start > Run > type CMD, from the command line type PING x.x.x.x (an IP to a working PC) then ping the bad PC from a good 1.

if that works then ping the router from the bad PC, if that works then try to ping an outside IP.

If you can't ping anything not even another PC, make sure you get assigned an IP address if its DHCP and make sure you set it up correctly including the subnet mask and gateway if its static. if TCP is all correct then see if you can ping the local IP Address, then try the loopback 127.0.0.1 if that fails it must be an issue with the adapter, try downlaoding new drivers. or check control panel > lan connection and make sure its enabled

Answer 3

The following are configured on your router (generally a web interface for your router at http://192.168.1.1):
- MAC address filtering: network cards have a unique ID called the MAC address (sort of like a "phone number"). You can configure your router to only permit certain MAC addresses (not the greatest security method, but it helps)
- IP address filtering: Also on the router configuration pages.
- DHCP: Generally handled by the router for home users but it sounds like you may have this configured on your server (presumably MS Windows). If using the server, disregard configuring on your router too as you likely have it configured with hard coded IP addresses internally.

At the desktop/server level:
- ipconfig: This is a command used at the MS-DOS command prompt. The command is used to check/reconfigure network settings. You can also do most of this through GUIs but many admins prefer to do it from the command line.
- firewall setting: This depends on what firewall you use and if you have it at the server and/or desktop. Microsoft includes a firewall in some of their operating systems or you can purchase third party applications.
- TCP/IP: This is a protocol. Unfortunately my networking skills aren't that robust for anything beyond the basics in this area.

Answer 4

I can't answer alot of this...there's alot to answer for sure and I'll leave it to the network experts on this forum.

One thing I'd check...on my linksys router I can set a range of IP addresses for it to assign. Say for example, the range is 192.168.1.2 to 192.168.1.5, then that's only 4 IP addresses it will assign. Have you limited your router to fewer IP addresses than you need?

DHCP - your router will do DHCP (issuing of IP addresses as explained above)

Good luck!