On Fri, 11 Jul 2008, Arun Khan wrote: > On Wednesday 09 Jul 2008, Dr. Sharukh K. R. Pavri. wrote: > > > I now want to connect my laptop to the net thru the broadband modem > > via the wifi. > > Your wording is confusing. If the broadband modem is connected to the > PC then the PC is acting as the gateway. The laptop the PC is router,
sorry -- let me clarify: the pc has eth0 that connects to a cable modem. The pc _also_ has a wlan0. > > > I managed to get the laptop talking to the kubuntu machine and I can > > even browse the net on the laptop. > > Hmm. implies packet from 192.168.0.x are being forwarded and NAT'd. > > > The problem is that I have lost internet connectivity on the kubuntu > > machine :( . No ping, no web access, zilch. > > Strange. What is the exact error message? > Are you pinging by hostname or IP address? What are the entries > in /etc/resolv.conf? I am pinging by hostname. After running the commands, the error is ping: unknown host www.yahoo.com if I ping by IP address [EMAIL PROTECTED]:~$ ping -c5 87.248.113.14 PING 87.248.113.14 (87.248.113.14) 56(84) bytes of data. ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted ping: sendmsg: Operation not permitted --- 87.248.113.14 ping statistics --- 5 packets transmitted, 0 received, 100% packet loss, time 3999ms -------------------------------------------------------- /etc/resolv.conf shows the hathway dns servers (three of them) > On the PC what is the output of: > > $host -t ns yahoo.com > before runing the iptables command -------------------------------------- [EMAIL PROTECTED]:~$ host -t ns yahoo.com yahoo.com name server ns3.yahoo.com. yahoo.com name server ns4.yahoo.com. yahoo.com name server ns5.yahoo.com. yahoo.com name server ns6.yahoo.com. yahoo.com name server ns8.yahoo.com. yahoo.com name server ns1.yahoo.com. yahoo.com name server ns2.yahoo.com. -------------------------------------- after iptables command [EMAIL PROTECTED]:~$ host -t ns yahoo.com ;; connection timed out; no servers could be reached ---------------------------------------- so yes, a dns problem. but how do I fix this ? As I said, a network restart solves this probelm but then the laptop loses connectivity. :( > > I have the follwoing setup: > > > > modem <-> (pub.lic.I.P) PC <-> wifi (192.168.1.202) <-> > > (192.168.1.204) laptop > > Looks like you have the modem in "Bridge" mode. Your PC is visible on > the 'Net. I suggest you put it in router mode and use the router as > the gateway. This will protect your PC via the NAT'd firewall and you > will not have to put in any iptables rules for eth0. It's a cable modem. I tried to open http://10.40.0.1/ but no luck. That address is the first hop on traceroute. > > > I've changed it to > > > > route add -net 0.0.0.0 netmask 0.0.0.0 gw 192.168.1.202 > > You can simplify the above with the following: > > # route add default gw 192.168.1.202 > > on your laptop and other systems. ok, will do that. > > Me suspect you have a DNS problem on your PC 'cuz your laptop is able to > connect (thru the PC) to websites and get responses back. > > > -- > Arun Khan > -- > http://mm.glug-bom.org/mailman/listinfo/linuxers -- Dr. Sharukh K. R. Pavri. Homoeopath, Linuxer. There is a very fine line between "hobby" and "mental illness." -- http://mm.glug-bom.org/mailman/listinfo/linuxers
