Hetzner VMWare Setup
How CT composed their VMware setup at Hetzner.de
Link : http://www.compa.nl/hetznervmware
In our setup (EQ4) we have a different IP for the dedicated rootserver (the EQ4) than our subnet.
As Hetzner routes subnets and doesn't provide them 'just' available you can't use bridged networking in a normal way.
The network at Hetzner is setup that ONLY the MAC-address (physical network adapter so to speak) of the EQ4 machine is allowed on the network.
Their solution, provided through their wiki, is to use NAT.
Our professionals in networking don't like NAT, certainly not on dedicated hardware and there is an easy way around this.
We got our details from;
- The Hetzner wiki - wiki.hetzner.de
- This excellent blog-entry - blog.damn1337.de
- Our experience with ADSL routing stuff :)
Assumptions
- You are on a different subnet with your EQ4 than your host is
- or, same as above but you have multiple subnets (implicitly making your host differing from one of them)
- You run Linux (any, really) as your host operating system
- You use VMware Server to virtualize your environment
Helpfull
- We made this using debian as the host
- We have FreeBSD guests
- Installed VMware Server version 2
Syntax
- We will use EQ4 host address 1.2.3.4
- We get subnet 5.6.7.32/28 routed to our box from Hetzner (14 usable ip)
Setup of the Host
- By defailt your /etc/network/interfaces (or similar) will look like
# device: eth0 auto eth0 iface eth0 inet static address 1.2.3.4 broadcast 1.2.3.31 netmask 255.255.255.224 gateway 1.2.3.1 # default route to access subnet up route add -net 1.2.3.192 netmask 255.255.255.224 gw 1.2.3.1 eth0
- We added the following (basically one route add per usable IP)
# Virtual subnet hosts routing up ip addr add 5.6.7.32/255.255.255.240 dev eth0 # Virtual hosts dedicated routing up route add -host 5.6.7.33 gw 5.6.7.33 up route add -host 5.6.7.34 gw 5.6.7.34 up route add -host 5.6.7.35 gw 5.6.7.35 up route add -host 5.6.7.36 gw 5.6.7.36 up route add -host 5.6.7.37 gw 5.6.7.37 up route add -host 5.6.7.38 gw 5.6.7.38 up route add -host 5.6.7.39 gw 5.6.7.39 up route add -host 5.6.7.40 gw 5.6.7.40 up route add -host 5.6.7.41 gw 5.6.7.41 up route add -host 5.6.7.42 gw 5.6.7.42 up route add -host 5.6.7.43 gw 5.6.7.43 up route add -host 5.6.7.44 gw 5.6.7.44 up route add -host 5.6.7.45 gw 5.6.7.45 up route add -host 5.6.7.46 gw 5.6.7.46
Setup of the Guest
- Install the VMware tools if you like (remember to install /usr/ports/misc/compat6x for FreeBSD 7 and up with VMware 2.0.2 or lower)
- For FreeBSD your almost there, just add these lines to your /etc/rc.conf
ifconfig_em0="5.6.7.33" # Static routes static_routes="direct default" route_direct="1.2.3.4 -iface em0" route_default="default 1.2.3.4"
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