Guest not communicating with host with VMWare installation on Hetzner server

milon2009 · 10-07-2009, 04:45 PM

Hi,

I have just leased a server with Hetzner in Germany and wish to run VMware on a CentOS host. The problem is that Hetzner assign their ip addresses to the specific MAC address of the host and so bridging the guest's network connection does not work.

How can I get the guest to communicate with the host and internet?

HOST DETAILS (CentOS 5.3 with VMware server 2.0.1):

ifconfig:

Code:

eth0      Link encap:Ethernet  HWaddr 00:24:21:EF:30:6C
          inet addr:188.40.x.18  Bcast:188.40.x.63  Mask:255.255.255.255
          inet6 addr: fe80::224:21ff:feef:306c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:114048 errors:0 dropped:0 overruns:0 frame:0
          TX packets:70799 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16410218 (15.6 MiB)  TX bytes:13850165 (13.2 MiB)
          Interrupt:82 Base address:0xe000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:38510 errors:0 dropped:0 overruns:0 frame:0
          TX packets:38510 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:29094263 (27.7 MiB)  TX bytes:29094263 (27.7 MiB)

vmnet1    Link encap:Ethernet  HWaddr 00:50:56:C0:00:01
          inet addr:172.16.98.1  Bcast:172.16.98.255  Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:fec0:1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:49 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vmnet8    Link encap:Ethernet  HWaddr 00:50:56:C0:00:08
          inet addr:192.168.150.1  Bcast:192.168.150.255  Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:fec0:8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:30 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

nano /etc/sysctl.conf:

Code:

### Hetzner Online AG installimage
# sysctl config
net.ipv4.ip_forward=1
net.ipv4.conf.all.rp_filter=1
net.ipv4.icmp_echo_ignore_broadcasts=1

nano /etc/sysconfig/network-scripts/ifcfg-eth0

Code:

### Hetzner Online AG - installimage
# device: eth0

DEVICE=eth0
BOOTPROTO=static
BROADCAST=188.40.x.63
HWADDR=00:24:21:ef:30:6c
IPADDR=188.40.x.18
NETMASK=255.255.255.255
SCOPE="peer 188.40.120.1"

GUEST (CentOS 5.3)

ifconfig

Code:

eth0      Link encap:Ethernet  HWaddr 00:0C:29:20:d7:5e
          inet addr:188.40.x.57  Bcast:188.40.x.63  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe20:d75e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3 errors:0 dropped:0 overruns:0 frame:0
          TX packets:78 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:180 (180b)  TX bytes:4880 (4.7 KiB)
          Base address:0x2000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:38510 errors:0 dropped:0 overruns:0 frame:0
          TX packets:38510 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1896 (1.8 KiB)  TX bytes:1896 (1.8 KiB)

nano /etc/sysconfig/network-scripts/ifcfg-eth0

Code:

DEVICE=eth0
BOOTPROTO=static
BROADCAST=188.40.x.63
HWADDR=00:0C:29:20:d7:5e
IPADDR=188.40.x.57
NETMASK=255.255.255.0
GATEWAY=188.40.x.18

Many thanks in advance!

unSpawn · 10-18-2009, 03:17 AM

Depends on the purpose of the guest. If it for instance only needs to provide one port, say TCP/80, you could make the guest use DHCP on vmnet1 or vmnet8 and forward traffic between guest and host nets. If your guest provides services (uses ports) your host doesn't you could make the guest use the same address as the host but that has the potential to expose more than you would want to so be careful.