Hi, I've searched this forum extensively but didn't find an answer to my question(s): My setup: router/adsl modem is on ip 10.0.0.11/8 (has dns server) My main linux box (ubuntu 5.10 with 2.6.16-suspend2 kernel) is on ip 10.0.0.4 called lexo My vmware vm (under main box): debian etch on ip 192.168.0.2 I've added a virtual ip for 10.0.0.4 of 192.168.0.1 by doing the follwing: Code: ifconfig eth0:0 192.168.0.1 netmask 255.255.255.0 up Output of: Code: etch:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:0C:29:6F:B6:A3 inet addr:192.168.0.2 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe6f:b6a3/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:37996 errors:0 dropped:0 overruns:0 frame:0 TX packets:295 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7476327 (7.1 MiB) TX bytes:24318 (23.7 KiB) Interrupt:177 Base address:0x1400 ... etch:~# route -nee Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface MSS Window irtt 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 0 0 0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 0 0 0 root@lexo:~# cat /etc/sysctl.conf # # /etc/sysctl.conf - Configuration file for setting system variables # See sysctl.conf (5) for information. # # Be warned that /etc/init.d/procps is executed to set the following # variables. However, after that, /etc/init.d/networking sets some # network options with builtin values. These values may be overridden # using /etc/network/options. #kernel.domainname = example.com #net/ipv4/icmp_echo_ignore_broadcasts=1 dev.cdrom.lock=0 # Enables packet forwarding net.ipv4.ip_forward=1 root@lexo:~# sysctl -p root@lexo:~# ifconfig eth0 Link encap:Ethernet HWaddr 00:05:1C:01:7C:85 inet addr:10.0.0.4 Bcast:10.255.255.255 Mask:255.0.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:8624 errors:0 dropped:0 overruns:0 frame:0 TX packets:7796 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3390769 (3.2 MiB) TX bytes:1260345 (1.2 MiB) Interrupt:11 Base address:0xb800 eth0:0 Link encap:Ethernet HWaddr 00:05:1C:01:7C:85 inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:11 Base address:0xb800 ... root@lexo:~# route -nee Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface MSS Window irtt 172.16.231.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet1 0 0 0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 0 0 0 172.16.120.0 0.0.0.0 255.255.255.0 U 0 0 0 vmnet8 0 0 0 10.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 eth0 0 0 0 0.0.0.0 10.0.0.11 0.0.0.0 UG 0 0 0 eth0 0 0 0 OK. But routing seems to not work properly: Code: etch:~# ping -c 3 10.0.0.11 PING 10.0.0.11 (10.0.0.11) 56(84) bytes of data. From 192.168.0.1: icmp_seq=1 Redirect Host(New nexthop: 10.0.0.11) From 192.168.0.1: icmp_seq=4 Redirect Host(New nexthop: 10.0.0.11) From 192.168.0.1: icmp_seq=10 Redirect Host(New nexthop: 10.0.0.11) --- 10.0.0.11 ping statistics --- 28 packets transmitted, 0 received, 100% packet loss, time 27004ms and when I do: Code: etch:~# ping -c 1 google.com ping: unknown host google.com But dns is working on the (real) router/adsl modem and I can ping google.com from lexo. I just want to understand how routing works in unix. Am I on the right track? Is this problem maybe because I'm using everything virtually (virtual ip vmware vms etc.)? It should still work shouldn't it? What is wrong? I thought this would be the simplest setup, but it turns out to be not working. If you need any more outputs, please tell me so. Thanks in advance . Or is it not working because eth0 on lexo is shared and has the same MAC address?? Does anyone know what the vmnet settings (routing table) are for and why they are in a different subnet? Is that maybe the problem? Can I just delete them or are they important? How is it in Xen?