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No connectivity

can't connect to network the desktop (compaq evo) has lights on the ethernet port, gets an ip address, subnet mask, def gateway and can release/renew. device manager says it's working

i tried an ibm thinkpad with the same cable and same rj-45 port. it has lights on the ethernet port, gets an ip address, subnet mask, def gateway and can release/renew. device manager says it's working

i also tried disabling and reenabling both NICs and still no connectivity

unsuccessful ping to yahoo.com

switched cat 5 cables and same problem

the drop is a copper rj45 port which rarely goes out.

any other suggestions. thanks!
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Tech_10
Asked:
Tech_10
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1 Solution
 
x_X_x_X_xCommented:
Are you using a router, hardware firewall etc. Also if you are using a router can you ping anything on the lan side? Do you have software firewalls installed...Can you ping the tcp/ip stak 127.0.0.1?
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jamietonerCommented:
what ip address are you getting? and can you ping your default gateway address? also what kind of router are you using and have you tryed resetting it?
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olivepeopleCommented:
x_X_x_X_x asks important questions!

But for a moment, I'm gonna assume you have a router, and perhaps that you've just got it?  Could you (can you) connect to the internet without the router?  Maybe see if your router has a MAC cloning setting... again assuming you could connect without the router, from the computer you have used most often to connect, set the router to clone the MAC address.  (For an example of why this might help, see here: http://www.practicallynetworked.com/support/MAC_addr_clone.htm)

All the best to you ... let us know how it's going.
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Dushan De SilvaTechnology ArchitectCommented:
check you have installed any firewall software or spyware software. If it so check you have blocked the internet and other services.

BR Dushan
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olivepeopleCommented:
P.S.  jamietoner asks good questions too. :)  I think we were commenting at the same time....
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RehmancCommented:
I had a similar problem recently. The PC was able to release/renew the ip address but was unable to ping anything on the network. I isolated the problem to a switch/switch port. Try connecting the Your PC to a different port on a router/switch. If that doesnt solve the problem try using a different router or a switch in order to isolate the problem.
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FermionCommented:
Did you forget to pay your ISP bill?
Perhaps I'm joking, but I HAVE seen that happen.

I have also seen where the router was not connected correctly. Be CERTAIN that the RJ-45 coming from your DSL or cable modem is connected to the WAN port of the router, not any other port!
Also, sometimes, the port next to the WAN port is for cascading routers/switches and must NOT be used for connecting to a computer.

Anyway, if a direct connection(bypassing the router) to the main RJ-45 does not work, there are several possibilities:
Your TCP/IP configuration settings are incorrect or was changed.
DNS is disabled.
Physical cabling problem from the main.
Physical problem with the DSL or Cable modem
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Tech_10Author Commented:
there is no router so this is a direct connection...

i will try looking at the firewall and spyware and see if that works...thanks and keep the suggestions coming!


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olivepeopleCommented:
OK - no router, got it!  So, you're connecting from computer to dsl/cable modem to internet?  OK...

Have you EVER been able to connect?  If yes, has anything changed since you could last connect?

What make/model of modem is it?  You might try looking it up on www.dslreports.com ... I have found many useful things on the forums there for myself and for others on the ExpertsExchange.

I don't think I read this suggestion already - excuse the repetition if it's been made - if you haven't tried this already, disconnect everything... turn off the modem, unplug it, disconnect the cables, etc.  Restart your computer.  Wait a minute or two and plug the modem in again, reconnecting the outbound cables.  Turn it on and wait for it to establish a connection again... my modem has the two rightmost lights come on solid green when it's "ready".  Connect the computer to modem cable again and try to log in to your ISP (or connect however you normally would).

Maybe that seems silly, but many a time did I have to do that to make my computer connect to my ISP before I got a router.  Once I finally got it configured properly, my connection "seems" more stable and available than ever with the router.

Anyway, I agree with Fermion to get your physical equipment checked out/exchanged if you continue to have the problem.  Especially if you have *never* been able to connect using the current setup.  Have you tried getting any tech support?  How did that go?  (I know, I know... horror stories abound with tech support, but I've actually had some helpful people on the other end.  It can happen!)

And also with Dushan, to check out any software that might be impeding your connectivity.  For example, turn the firewall off and try to connect... only going to "safe" sites, of course, just long enough to see if there is a difference.

Keep us up to date!  All the best!
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FermionCommented:
Oh yeah, I almost forgot... usually there is a recessed "reset" button on a cable/dsl modem. I have had to reset my own cable modem probably 20 times in the last 5-years. With mine, I have to keep it pressed in for 15 seconds, then release it.
Olivepeoples suggestion is good, and should accomplish the same thing(I think, not entirely sure though)
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jamietonerCommented:
see if you can ping your default gateway address if you can that means there is good communication between your computer and the broadband modem, (more than likel if your getting an ip adrees you will be able to ping the default gateway), Try resetting the modem as mentioned above either press the reset button or if you dont have one unplug the power to the modem and leave it unpluged for 30-60 seconds. If your still unmable to get an external connection your going to need to contact or ISP, either there having a problem with thier service or your modem has gone bad. If your unable to ping your ip address it could either be a bad cable, modem or nic.
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olivepeopleCommented:
I forgot about the reset button! :)  On my modem it's called "defaults"... I've never used on it on my modem, but I've also never (knowingly) adjusted the settings on my modem either.  (Compare that with my router which I had to reset to default values numerous times before getting it "just right".)  Anyway, you'll need to unravel a paperclip or use the tip of a straight pin to press the button in.

Fermion's latest suggestion got me thinking about something else... let us know what kind of modem you have because there are likely various files and logs you can access which might shed more light about what's happening (or not happening).  If you're like me and don't have a modem manual, or you manual doesn't tell you how to access such things, usually a good internet search (or a person who knows what to try) will help out.
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NLPCCommented:
You mentioned you could not ping yahoo.com. Are you able to ping or connect to ip address as oppose to name.  You also mentioned ip , gateway and subnet but made no mention to DNS.  Maybe your DNS cache is out of date - Try flushing your DNS  by using cmd

ipconfig /flushdns

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Dushan De SilvaTechnology ArchitectCommented:
can you telnet for specified ports?

BR Dushan
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Tech_10Author Commented:
Rehmanc had the closest answer. We ended up connecting the PC to a different port on the switch in the closet. Thanks!
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