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1

I've created a Windows XP image and I'm booting it with qemu. When using "user mode networking" via -net user, my guest os (windows xp) gets the 10.0.2.15 IP assigned and I can ping 10.0.2.2 so Windows drivers are installed correctly.

Unfortunately I'm unable to access anything else. I read tutorials and I found that "user mode networking" doesn't forward connections to internet, and I've to use either TAP device, or Bridge device.

I'm unfamiliar with these devices and the tutorials are very confusing and complicated.

One of tutorials suggested that I use qemu-bridge-helper. I configured /etc/qemu/bridge.conf to allow br0 bridge device and created the br0 device via brctl addbr br0.

I followed the tutorials and booted my winxp this way:

qemu-system-x86_64 --enable-kvm -m 2048 

  -drive file=winxp.img,if=virtio 

  -net nic,model=virtio 

  -net bridge,br=br0

The image boots nicely but I don't get an IP address. The reason is that Windows is configured to use DHCP but "br0" is not providing a DHCP address as it's just a bridge interface (somehow tied with tap0 but I'm not sure what that means).

My question is - how do I configure "br0" to give addresses to winxp over DHCP? Do I've to run a dhcp server on tap0 interface? How is br0, tap0 and eth0 related? (eth0 is my static IP interface, the only internet interface.)

My second question is - is there an easier way to configure all of this to allow simple internet access to guest os?

networking kvm dhcp qemu bridge

share|improve this question

edited Oct 26 '16 at 0:36

bodacydo

asked Oct 26 '16 at 0:30

bodacydobodacydo

16229

bumped to the homepage by Community♦ 1 hour ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

add a comment | 

1

I've created a Windows XP image and I'm booting it with qemu. When using "user mode networking" via -net user, my guest os (windows xp) gets the 10.0.2.15 IP assigned and I can ping 10.0.2.2 so Windows drivers are installed correctly.

Unfortunately I'm unable to access anything else. I read tutorials and I found that "user mode networking" doesn't forward connections to internet, and I've to use either TAP device, or Bridge device.

I'm unfamiliar with these devices and the tutorials are very confusing and complicated.

One of tutorials suggested that I use qemu-bridge-helper. I configured /etc/qemu/bridge.conf to allow br0 bridge device and created the br0 device via brctl addbr br0.

I followed the tutorials and booted my winxp this way:

qemu-system-x86_64 --enable-kvm -m 2048 

  -drive file=winxp.img,if=virtio 

  -net nic,model=virtio 

  -net bridge,br=br0

The image boots nicely but I don't get an IP address. The reason is that Windows is configured to use DHCP but "br0" is not providing a DHCP address as it's just a bridge interface (somehow tied with tap0 but I'm not sure what that means).

My question is - how do I configure "br0" to give addresses to winxp over DHCP? Do I've to run a dhcp server on tap0 interface? How is br0, tap0 and eth0 related? (eth0 is my static IP interface, the only internet interface.)

My second question is - is there an easier way to configure all of this to allow simple internet access to guest os?

networking kvm dhcp qemu bridge

share|improve this question

edited Oct 26 '16 at 0:36

bodacydo

asked Oct 26 '16 at 0:30

bodacydobodacydo

16229

bumped to the homepage by Community♦ 1 hour ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

add a comment | 

I've created a Windows XP image and I'm booting it with qemu. When using "user mode networking" via -net user, my guest os (windows xp) gets the 10.0.2.15 IP assigned and I can ping 10.0.2.2 so Windows drivers are installed correctly.

Unfortunately I'm unable to access anything else. I read tutorials and I found that "user mode networking" doesn't forward connections to internet, and I've to use either TAP device, or Bridge device.

I'm unfamiliar with these devices and the tutorials are very confusing and complicated.

One of tutorials suggested that I use qemu-bridge-helper. I configured /etc/qemu/bridge.conf to allow br0 bridge device and created the br0 device via brctl addbr br0.

I followed the tutorials and booted my winxp this way:

qemu-system-x86_64 --enable-kvm -m 2048 

  -drive file=winxp.img,if=virtio 

  -net nic,model=virtio 

  -net bridge,br=br0

The image boots nicely but I don't get an IP address. The reason is that Windows is configured to use DHCP but "br0" is not providing a DHCP address as it's just a bridge interface (somehow tied with tap0 but I'm not sure what that means).

My question is - how do I configure "br0" to give addresses to winxp over DHCP? Do I've to run a dhcp server on tap0 interface? How is br0, tap0 and eth0 related? (eth0 is my static IP interface, the only internet interface.)

My second question is - is there an easier way to configure all of this to allow simple internet access to guest os?

networking kvm dhcp qemu bridge

share|improve this question

edited Oct 26 '16 at 0:36

bodacydo

asked Oct 26 '16 at 0:30

bodacydobodacydo

16229

qemu-system-x86_64 --enable-kvm -m 2048 

  -drive file=winxp.img,if=virtio 

  -net nic,model=virtio 

  -net bridge,br=br0

share|improve this question

edited Oct 26 '16 at 0:36

bodacydo

asked Oct 26 '16 at 0:30

bodacydobodacydo

16229

share|improve this question

edited Oct 26 '16 at 0:36

bodacydo

asked Oct 26 '16 at 0:30

bodacydobodacydo

16229

asked Oct 26 '16 at 0:30

bodacydobodacydo

16229

asked Oct 26 '16 at 0:30

bodacydobodacydo

16229

2 Answers
2

active

oldest

votes

0

After your command brctl addbr br0 you need to connect new bridge to real network interface, by example eth0, witch is connected to the Internet. Use for it next command brctl addif br0 eth0.

share|improve this answer

answered Oct 26 '16 at 5:12

Khirgiy MikhailKhirgiy Mikhail

27415

add a comment | 

0

My second question is - is there an easier way to configure all of this to allow simple internet access to guest os?

You don't (or, at least, shouldn't) need to manually configure anything for simple internet access; QEMU automatically handles it. It has some limitations, such as not supporting the ICMP protocol (used by ping), not being visible to the external network, nor being able to talk to other virtual machines run the same way, but it works well for simple usage. See the Arch Wiki for more information.

share|improve this answer

answered Dec 10 '18 at 13:15

CrestwaveCrestwave

685

add a comment | 

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0

After your command brctl addbr br0 you need to connect new bridge to real network interface, by example eth0, witch is connected to the Internet. Use for it next command brctl addif br0 eth0.

share|improve this answer

answered Oct 26 '16 at 5:12

Khirgiy MikhailKhirgiy Mikhail

27415

add a comment | 

0

After your command brctl addbr br0 you need to connect new bridge to real network interface, by example eth0, witch is connected to the Internet. Use for it next command brctl addif br0 eth0.

share|improve this answer

answered Oct 26 '16 at 5:12

Khirgiy MikhailKhirgiy Mikhail

27415

add a comment | 

After your command brctl addbr br0 you need to connect new bridge to real network interface, by example eth0, witch is connected to the Internet. Use for it next command brctl addif br0 eth0.

share|improve this answer

answered Oct 26 '16 at 5:12

Khirgiy MikhailKhirgiy Mikhail

27415

share|improve this answer

answered Oct 26 '16 at 5:12

Khirgiy MikhailKhirgiy Mikhail

27415

answered Oct 26 '16 at 5:12

Khirgiy MikhailKhirgiy Mikhail

27415

answered Oct 26 '16 at 5:12

Khirgiy MikhailKhirgiy Mikhail

27415

0

My second question is - is there an easier way to configure all of this to allow simple internet access to guest os?

You don't (or, at least, shouldn't) need to manually configure anything for simple internet access; QEMU automatically handles it. It has some limitations, such as not supporting the ICMP protocol (used by ping), not being visible to the external network, nor being able to talk to other virtual machines run the same way, but it works well for simple usage. See the Arch Wiki for more information.

share|improve this answer

answered Dec 10 '18 at 13:15

CrestwaveCrestwave

685

add a comment | 

0

My second question is - is there an easier way to configure all of this to allow simple internet access to guest os?

You don't (or, at least, shouldn't) need to manually configure anything for simple internet access; QEMU automatically handles it. It has some limitations, such as not supporting the ICMP protocol (used by ping), not being visible to the external network, nor being able to talk to other virtual machines run the same way, but it works well for simple usage. See the Arch Wiki for more information.

share|improve this answer

answered Dec 10 '18 at 13:15

CrestwaveCrestwave

685

add a comment | 

My second question is - is there an easier way to configure all of this to allow simple internet access to guest os?

You don't (or, at least, shouldn't) need to manually configure anything for simple internet access; QEMU automatically handles it. It has some limitations, such as not supporting the ICMP protocol (used by ping), not being visible to the external network, nor being able to talk to other virtual machines run the same way, but it works well for simple usage. See the Arch Wiki for more information.

share|improve this answer

answered Dec 10 '18 at 13:15

CrestwaveCrestwave

685

share|improve this answer

answered Dec 10 '18 at 13:15

CrestwaveCrestwave

685

answered Dec 10 '18 at 13:15

CrestwaveCrestwave

685

answered Dec 10 '18 at 13:15

CrestwaveCrestwave

685