tetrahedra via qubes-users: > On Thu, Dec 26, 2019 at 11:47:37AM +0000, 'awokd' via qubes-users wrote: >> There's a brief discussion at https://www.qubes-os.org/doc/networking/, >> but there may be more detailed notes in the source code for Qubes' VM >> networking components. Qubes uses Xen's networking, so that might be the >> best place to begin research. > > What responsibilties does sys-net have in terms of forwarding DNS? The > documentation specifies how things work for AppVMs, and it says there is > no DNS server in the "network driver domain" (sys-net), but it does not > say what sys-net actually has to do. > > Also, the docs don't appear to be entirely accurate. The documentation > specifies a fairly complex set of routing tabels for the "network driver > domain" (sys-net, I assume), but the actual routing table on my sys-net > is fairly simple > > The table from the documentation: > Destination Gateway Genmask Flags Metric Ref > Use Iface > 10.137.0.16 0.0.0.0 255.255.255.255 UH 0 0 0 > vif4.0 > 10.137.0.7 0.0.0.0 255.255.255.255 UH 0 0 0 > vif10.0 > 10.137.0.9 0.0.0.0 255.255.255.255 UH 0 > [... many lines removed ...] > 192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0 > 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 > > The table from my sys-net: > [user@sys-net ~]$ sudo ip route > [user@sys-net ~]$ sudo route > Kernel IP routing table > Destination Gateway Genmask Flags Metric Ref Use > Iface > default _gateway 0.0.0.0 UG 600 0 0 > wls7 > 10.137.0.5 0.0.0.0 255.255.255.255 UH 32747 0 0 > vif5.0 > 192.168.0.0 0.0.0.0 255.255.255.0 U 600 0 0 > wls7 > > > It looks like the documentation is assuming sys-net has many more > virtual NICs than it actually does? > Did you check the Qubes source code responsible for setting these up? The qubes-devel mailing list might also be appropriate here...
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