(OT): networking problem (using Sarge as router)
From: H. S. (greatexcalibur_at_yahoo.com)
Date: 04/29/04
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To: debian-user@lists.debian.org Date: Thu, 29 Apr 2004 12:20:10 -0400
Hi,
This is a bit off topic, but since it involves Knoppix and Sarge network
interfaces files, I thought maybe I could get some help here.
I am trying to add another computer to my internal home network. My main
computer, say HomeR (running Debian Sarge 2.4.24-1-686), working as a
router has two NICs. It's eth0 connects to the high speed modem and eth1
connects to a switch and has the configuration:
#-------------------------------------------------------------------
#> cat /etc/network/interfaces
# Used by ifup(8) and ifdown(8). See the interfaces(5) manpage or
# /usr/share/doc/ifupdown/examples for more information.
# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)
# The loopback interface
auto lo
iface lo inet loopback
# The first network card - this entry was created during the Debian
installation
# (network, broadcast and gateway are optional)
auto eth0
iface eth0 inet static
address 192.168.1.0
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
# gateway 192.168.10.1
pre-up /etc/iptables/iptables.sh panic
pre-up /etc/iptables/iptables.sh preup_start
auto eth1
iface eth1 inet static
address 192.168.0.2
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
# gateway 192.168.1.0
#-------------------------------------------------------------------
The route command on HomeR gives:
#> route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
a.b.c.d 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
0.0.0.0 a.b.c.d 0.0.0.0 UG 0 0 0 ppp0
where a.b.c.d is the IP that my ISP provides each time I connect to it.
My two internal computer are connected to the swith from their NICs.
One of my internal home computers, say Home1, is 192.168.0.10 and is
working fine (ping, internet, ssh, etc. towards HomeR and outside). The
other, say Home2, is the one I am trying to add. I put in Knoppix and
set Home2 up as 192.168.0.11, with netmask 255.255.255.0, gateway
192.168.0.2 and with the nameserves which are listed in
/etc/resolve.conf of HomeR (the router machine).
I cannot ping to or from 192.168.0.11 any other computer. Domain names
do not get resolved. If I try pinging it from HomeR, I get:
# ping -c4 192.168.0.11
PING 192.168.0.11 (192.168.0.11) 56(84) bytes of data.
From 192.168.0.2 icmp_seq=1 Destination Host Unreachable
From 192.168.0.2 icmp_seq=2 Destination Host Unreachable
From 192.168.0.2 icmp_seq=3 Destination Host Unreachable
From 192.168.0.2 icmp_seq=4 Destination Host Unreachable
--- 192.168.0.11 ping statistics ---
4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 3000ms
, pipe 3
But if I disconnect Home1 from the internal LAN, and do 'tcpdump -i
eth1' on HomeR, and ping HomeR from Home2, I get:
# tcpdump -i eth1
tcpdump: listening on eth1
03:19:03.838878 arp who-has 192.168.0.2 tell 192.168.0.11
03:19:03.838928 arp reply 192.168.0.2 is-at 0:50:ba:50:3:87
03:19:04.833008 arp who-has 192.168.0.2 tell 192.168.0.11
03:19:04.833039 arp reply 192.168.0.2 is-at 0:50:ba:50:3:87
03:19:05.833046 arp who-has 192.168.0.2 tell 192.168.0.11
03:19:05.833091 arp reply 192.168.0.2 is-at 0:50:ba:50:3:87
But if I do 'tcpdump -i eth0' on Home2 and ping Home2 from HomeR, I get
no activity. So it seems that Home2 is able to send packets to the
192.168.0.0 network, but no other machine is able to send any to
192.168.0.11(Home2).
Any ideas what could be going wrong or how do I go about solving this?
Thanks a ton,
->HS
-- (Remove all underscores,_if any_, from my email address to get the correct one. Apologies for the inconvenience, but this is to reduce spam.) -- To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
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