Public bug reported:
While set up a tun/tap network with Ubuntu as host and lfslivecd as
guest in Qemu, I got some problem. Here is the commands I used,
Ubuntu(host):
$ sudo qemu -cdrom lfslivecd -boot d -kernel-kqemu -m 512 -net nic -net tap &
$ sudo ifconfig tap0 192.168.10.1
$ sudo sysctl -w net.ipv4.ip_forward=1
$ sudo iptables -t nat -A POSTROUTING -j MASQUERADE
lfslivecd(guest):
$ ifconfig eth0 192.168.10.2
$ route add default gw 192.168.10.1
Both host and guest pinging each other properly.. but problem occurs
when I tried to ping opendns's default servers from lfslivecd.
lfslivecd(guest):
$ ping -c 3 208.67.222.222
3 packets transmitted, 0 packets received, 100% packet loss
After disabling 'gufw', everything worked. And I added opendns's
nameservers in resolv.conf
lfslivecd(guest):
$ cat > resolv.conf
nameserver 208.67.222.222
nameserver 208.67.220.220
It will be helpful if someone can write a rule to accept packets to go
to Guest Instances in the default Gufw rules setup. Is accepting packets
for Guest's, a security concern?
** Affects: gui-ufw
Importance: Undecided
Status: New
** Tags: iptables masquerade qemu
--
Gufw not allowing Qemu Guest's packets (tun/tap)
https://bugs.launchpad.net/bugs/424631
You received this bug notification because you are a member of Gufw
Developers, which is the registrant for Gufw.
Status in GUI for ufw: New
Bug description:
While set up a tun/tap network with Ubuntu as host and lfslivecd as guest in
Qemu, I got some problem. Here is the commands I used,
Ubuntu(host):
$ sudo qemu -cdrom lfslivecd -boot d -kernel-kqemu -m 512 -net nic -net tap &
$ sudo ifconfig tap0 192.168.10.1
$ sudo sysctl -w net.ipv4.ip_forward=1
$ sudo iptables -t nat -A POSTROUTING -j MASQUERADE
lfslivecd(guest):
$ ifconfig eth0 192.168.10.2
$ route add default gw 192.168.10.1
Both host and guest pinging each other properly.. but problem occurs when I
tried to ping opendns's default servers from lfslivecd.
lfslivecd(guest):
$ ping -c 3 208.67.222.222
3 packets transmitted, 0 packets received, 100% packet loss
After disabling 'gufw', everything worked. And I added opendns's nameservers in
resolv.conf
lfslivecd(guest):
$ cat > resolv.conf
nameserver 208.67.222.222
nameserver 208.67.220.220
It will be helpful if someone can write a rule to accept packets to go to Guest
Instances in the default Gufw rules setup. Is accepting packets for Guest's, a
security concern?
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