Ping Works but No Internet II
 

Hi,

I'm hoping that this forum can lend a hand to my lack of skills in networking.:newbie:

My diagnosis so far is that "ping" works for external sites like google.com but when I open up a browser, and I've tried several, no internet sites can be reached.

Up until now all network issues I've resolved were completely fixed once "ping external_site" was working but its not the case this time. So I'm puzzled.

I found a thread from a month ago with a very similar problem but it doesn't seem to have the same solution:
showthread.php?t=406629

The machine is
Red Hat Enterprise Linux AS release 3 (Taroon Update 1)
linux 2.4.21-9

It is one of serveral almost identical machines that are working, so I think the network settings (resolve.conf) are configured correctly.

Any help would be a lifesaver. How can ping work but browser http not work???

Thanks
Brian

ok do one thing....run
#ifconfig ppp0

then

#route add default gw x.56.215.133 (its actually your ISP's IP)

now try opeining the websites...

ping is to test whether a machine is up or not (unless its being filtered)
so its not only to check external sites...but you can use it to check your local machines also. e.g
#ping 192.168.0.2

regards

There is any chance you have set up a proxy server for this machine or for the browser you are using ?
At a shell type "printenv | grep -i proxy".
At the browser look in the configuration panel, if it has a proxy enabled.

At the command line, try to access a web site using a command line tool, like wget or lynx.

"wget http://www.google.com" or "lynx http://www.google.com".
If they work, them you have internet access.

Hey :) Thanks for the help.

ppp0: error fetching interface information: Device not found

I don't have such a device installed. Other similar machines on our network also don't have this installed and are working fine. None the less I'll look into this Point-to-Point protocol to see if that is what is missing.



I think the I have the gateway configured correctly. The results of "route -n" are the same on the working machines and the not-working machine.



Thanks for getting me started on some leads. I'll let you know how it goes.

Thanks for the reply. :)

it looks like printenv doesn't have any mention of a proxy.
>printenv | grep -i proxy
>

thanks for the new tools. Can't believe I forgot about them. I have wget on the busted machine and it seems to hang after resolving the website.

>wget www.google.com
--12:33:12-- http://www.google.com/
=> `index.html'
Resolving www.google.com... done.
Connecting to www.google.com[216.239.37.104]:80... failed: Connection timed out.Connecting to www.google.com[216.239.37.99]:80... failed: Connection timed out.
Retrying.

--12:39:31-- http://www.google.com/
(try: 2) => `index.html'
Connecting to www.google.com[216.239.37.104]:80...
*then I killed it.


Thanks for the help. I'm still not sure what needs to be done, if you have anymore suggestions, or I did something wrong.

Try to disable the firewall ("redhat-config-securitylevel") and try again...I am running out of ideas...

thanks for the help. I'm thinking it must be a problem with the hardware firewall downstairs. Sorry for the trouble. I'll let you know if I find out that is the case.