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e86edb583e
So I wasted 1,5 hours trying to make bridged networking work just to get internet access in MacOS. I thought I didn't have internet in the VM because I tried to `ping 1.1.1.1`. Hopefully this note can help future users not to waste their time, too.
60 lines
2 KiB
Markdown
60 lines
2 KiB
Markdown
Guide to Bridged Networking
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===========================
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*Note*: you don't need to set up bridged networking just to get internet access. With `basic.sh` you should be able to access the internet from MacOS automatically. *However*, the ICMP protocol (used for `ping`) is not supported with the default networking solution.
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To set up bridged networking for the macOS VM, use one of the following methods:
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## Using /etc/network/interfaces
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It is possible to create the bridge and tun/tap interfaces by adding the following lines to `/etc/network/interfaces`. Replace `DEVICENAME` with your ethernet card's device name, and `MYUSERNAME` with the user that is starting the VM.
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```
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auto br0
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iface br0 inet dhcp
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bridge_ports DEVICENAME tap0
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auto tap0
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iface tap0 inet dhcp
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pre-up tunctl -u MYUSERNAME -t tap0
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```
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## Using NetworkManager
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You can use NetworkManager to control the bridge and tun/tap interfaces, by creating them with the following commands. Replace `DEVICENAME` with your ethernet card's device name.
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### Make the Bridge
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```
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nmcli connection add type bridge \
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ifname br1 con-name mybridge
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```
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### Attach Bridge to Ethernet
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```
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nmcli connection add type bridge-slave \
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ifname DEVICENAME con-name mynetwork master br1
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```
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### Make the Tun/Tap
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```
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nmcli connection add type tun \
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ifname tap0 con-name mytap \
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mode tap owner `id -u`
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```
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### Attach Tun/Tap to Bridge
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```
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nmcli connection mod mytap connection.slave-type bridge \
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connection.master br1
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```
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## Attach Bridge to QEMU
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Once you have set up the bridge and tun/tap on the host, you'll have to add the following line to `basic.sh`, replacing `-netdev user,id=net0`. Change `tap0` to your corresponding device name.
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```
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-netdev tap,id=net0,ifname=tap0,script=no,downscript=no \
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```
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You can optionally use the `vmxnet3` driver for higher performance compared to the default e1000. Note that replacing it requires macOS El Capitan or higher.
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```
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-device vmxnet3,netdev=net0,id=net0,mac=52:54:00:c9:18:27 \
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```
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