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How to run QEMU Windows guest without internet?
For this to work, samba must be installed on the host system; it doesn’t need to be configured or running, just the smbd binary is needed, which will be run with an ad-hoc configuration and no privileges. In windows 7, you can connect to the shared folder from Computer -> Add Network Location -> Choose a custom network location -> \\\\10.0.2.4\\qemu.
How to set the default gateway in KVM?
Guest-side: Set the default gateway to the IP address of the host (make sure the host and guest IP addresses are in the same subnet): Note: If the host is not on the same subnet as the guest, then you must manually add the route to the host before you create the default route: Another option is using VDE (Virtual Distributed Ethernet).
What is the user.0 identifier for KVM?
The user.0 identifier above is just to connect the two halves into one. You may use any identifier you wish, such as “n” or “net0”. Use rtl8139 instead of e1000 to get an rtl8139-based network interface. You can still access one specific port on the guest using the “hostfwd” option.
How is routing done in a KVM server?
Routing is done simply by setting the default route on the client to the IP address of the host, allowing IP forwarding, and setting a route to the tap device of the client on the host. Host-side: Allow IPv4 forwarding and add a route to the guest (could be put in a script, but the route has to be added after the guest has started):
Do you need Samba server to run QEMU?
Note that a SAMBA server must be installed on the host OS. QEMU was tested successfully with smbd versions from Red Hat 9, Fedora Core 3 and OpenSUSE 11.x.
How to isolate a guest from the host?
Valid options are: restrict=on|off If this option is enabled, the guest will be isolated, i.e. it will not be able to contact the host and no guest IP packets will be routed over the host to the outside.
Is there an alternative folder sharing method for QEMU?
Other problems with Samba is that it is not limited to folder sharing, it also does printer sharing, user mapping and whatsnot. All I need is to share one (or more?) folders with the Windows guest. Does there exist an alternative folder sharing method for QEMU that works with a Windows guest?
How to start a Samba server in QEMU?
The documentation suggests to expose a Samba server running somewhere in the network, or use the -net user,smb=/path/to/folder to start a samba server. I had no luck with the -net user,smb option of QEMU.
It requires to enable “Services fro NFS” in Windows guest and using regedit to set matching DWORD values AnonymousUid and AnonymousGid in Computer\\HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\ClientForNFS\\CurrentVersion\\Default.
Is it possible to dump network traffic on QEMU?
Please note that network traffic dumping can only work if QEMU has a chance to see the network packets, i.e. this does not work if you use virtio-net with vhost acceleration in the kernel. A simplest way is to forward a specific host port to guest port 22. It can be done via:
What kind of network backend does QEMU use?
By default QEMU will create a SLiRP user network backend and an appropriate virtual network device for the guest (eg an E1000 PCI card for most x86 PC guests), as if you had typed -net nic -net user on your command line.
How to change guest DHCP allocation in QEMU?
Adding the following to the qemu command line will change the network configuration to use 192.168.76.0/24 instead of the default (10.0.2.0/24) and will start guest DHCP allocation from 9 (instead of 15): You can isolate the guest from the host (and broader network) using the restrict option.