ping problem ...
in [Linux Networking]
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From: onkar on 25 Sep 2006 15:42 I am configuring ADSL connection on my Linux box every thing goes fine - network activated but ... $ ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. -----no response ---- here are the files which might be helpful in debugging ... $cat /etc/resolv.conf # MADE-BY-RP-PPPOE nameserver 203.94.227.70 nameserver 203.94.243.70 nameserver 192.168.1.1 $cat /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain my_computer localhost
From: HardHattek on 25 Sep 2006 15:50 you may need to include ip address and host name in the /etc/hosts onkar wrote: > I am configuring ADSL connection on my Linux box > every thing goes fine - network activated but ... > > $ ping 192.168.1.1 > PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. > -----no response ---- > > > > here are the files which might be helpful in debugging ... > > $cat /etc/resolv.conf > # MADE-BY-RP-PPPOE > nameserver 203.94.227.70 > nameserver 203.94.243.70 > nameserver 192.168.1.1 > > $cat /etc/hosts > # Do not remove the following line, or various programs > # that require network functionality will fail. > 127.0.0.1 localhost.localdomain my_computer localhost
From: onkar on 25 Sep 2006 15:55 can u please show me that ..i am relatively new to this .. thanks for the reply .. HardHattek wrote: > you may need to include ip address and host name in the /etc/hosts > > onkar wrote: > > I am configuring ADSL connection on my Linux box > > every thing goes fine - network activated but ... > > > > $ ping 192.168.1.1 > > PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. > > -----no response ---- > > > > > > > > here are the files which might be helpful in debugging ... > > > > $cat /etc/resolv.conf > > # MADE-BY-RP-PPPOE > > nameserver 203.94.227.70 > > nameserver 203.94.243.70 > > nameserver 192.168.1.1 > > > > $cat /etc/hosts > > # Do not remove the following line, or various programs > > # that require network functionality will fail. > > 127.0.0.1 localhost.localdomain my_computer localhost
From: Lew Pitcher on 25 Sep 2006 21:45 onkar wrote: > I am configuring ADSL connection on my Linux box > every thing goes fine - network activated but ... > > $ ping 192.168.1.1 > PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. > -----no response ---- [snip] OK, so you send pings out, but you don't get a ping response. It's not your /etc/hosts nor your /etc/resolv.conf. Both of those files work with hostname-to-ip address mappings, and since you are pinging by IP address, neither of those files is involved with the ping. It sounds like a routing problem of some sort. Let's see the results of /sbin/ifconfig and /sbin/route -n Give us both, from before and after the ping problem shows up. That is to say, give us the ifconfig and route output when ping works and the ifconfig and route output when ping fails. Also, tell us a bit about your network. Where, for instance, is 192.168.1.1 in relation to the system you issue the ping on? Is it the same system, or a different system. If it is on a different system, does ping to it work when your DSL is disabled? If not, let's see the routing tables for the 192.168.1.1 system as well. -- Lew Pitcher
From: Lew Pitcher on 25 Sep 2006 21:48 Lew Pitcher wrote: > onkar wrote: > > I am configuring ADSL connection on my Linux box > > every thing goes fine - network activated but ... > > > > $ ping 192.168.1.1 > > PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. > > -----no response ---- > [snip] > > OK, so you send pings out, but you don't get a ping response. > > It's not your /etc/hosts nor your /etc/resolv.conf. Both of those files > work with hostname-to-ip address mappings, and since you are pinging by > IP address, neither of those files is involved with the ping. > > It sounds like a routing problem of some sort. One further thought. It could also be the results of a firewall blocking pings. Do you run a firewall? Does rp-pppoe run the firewall for you? What do your firewall rules look like? Show us the output of /usr/sbin/iptables -L -v -n -t filter both with ping working and with ping failing -- Lew Pitcher
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