Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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first of all, i have searched for all "can ping, can't browse" threads in the internet, but couldn't solve my problem.
ok, i have a ubuntu 7.04 "server" with firestarter in it. it acts as a gateway between the internet and the local lan.
all was ok, but suddenly (perhaps after i did update ubuntu) all lan clients can't connect to the internet. windows machines work just fine, only linux machines. but, they all can ping to the internet.
beside that, i have webserver on that "server". all linux clients can't browse to it.
Execute this script. It executes a lot of network configuration tests and includes also a MTU test. If problems are detected you'll get a link to a wiki page which contains instructions how to fix your problem. If you don't get the problem fixed the log output file should be posted here for further problem determination.
the mtus between the broken linux machines and one linux machines that is still working, are the same.
thanks for the script, it's wonderful. But it doesn't solve the problem,
because the results between the broken linux machines and one working linux machine are similar.
using ip address instead of name doesn't work, the firefox status bar keep stating Waiting for www.google.com...
i've changed the ipv6 to true on firefox, still unable to browse
guys, there is something here,
if i type localhost:631 at one broken machine, it shows the cups server
but if i type 192.168.1.251:631 (it's ip address), it doesn't browse
and it happens on all broken machines! so, what's wrong with this?
my problem is solved,
apparently, it's not dns issue, or anything to do with computer logic.
there is a switch that perhaps broken, that switch causes the local port on
the server to behave strangely (because it only accepts windows connection, not linux).
thank you for everyone's help! especially rupertwh for giving me the idea.