Using TUN/TAP networking with QEMU grant guest machines access to some or all networks reachable by the host machine. This also allows accessing services offered by guests machines from any other host.
To be able to use TUN/TAP network, instead of directly configuring the physical Ethernet network device — my Realtek 8169 Gigabit Ethernet, which in [...]

When running QEMU 0.8.1 under Novell’s Xgl Xserver, the QEMU window black background turns transparent, which makes extremely difficult to read anything on it.
Searching on the Internet, I found a workaround which consists on launching QEMU with the XLIB_SKIP_ARGB_VISUALS variable set to 1. For example:
XLIB_SKIP_ARGB_VISUALS=1 qemu -hda …
I hope this will be fixed in a [...]