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add separate example for sys-firewall replacement

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awokd 2018-05-04 10:34:02 +00:00 committed by GitHub
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customization/dispvm-customization.md
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@ -61,8 +61,24 @@ It is possible to change the settings for each new Disposable VM (DispVM). This
You can use a static DispVM for `sys-*` as long as it is stateless.
For example, a `sys-net` using DHCP or `sys-usb` will work.
`sys-firewall` will not work unless you have no custom rules set, because per VM rules are stored in a configuration file inside that AppVM.
To create one:
`sys-firewall` will also work unless you have custom rules set, because per VM rules are stored in a configuration file inside the firewall AppVM.
To create one that has no PCI devices attached, such as for `sys-firewall`:
~~~
qvm-create -C DispVM -l red <sys-VMName>
qvm-prefs <sys-VMName> autostart true
qvm-prefs <sys-VMName> netvm <sys-net>
qvm-prefs <sys-VMName> provides_network true
~~~
Next, set the old `sys-firewall` autostart to false, and update any VMs that referenced the old one to instead point to the new.
For example, with `qvm-prefs work netvm sys-firewall2`.
To create one with a PCI device attached such as for `sys-net` or `sys-usb`, use the additional commands as follows.
**Note** You can use `qvm-pci` to [determine](/doc/assigning-devices/#r40) the `<BDF>`.
Also, you will often need to include the `-o no-strict-reset=True` [option](/doc/assigning-devices/#r40-1) with USB controllers.
~~~
qvm-create -C DispVM -l red <sys-VMName>