On Friday 3 June, 2011 16:14:03 you wrote:
> On 6/3/11 2:50 PM, cac...@quantum-sci.com wrote:
> > 
> > Hello Tom,
> > 
> > Can't make masquerading work for some reason.
> > 
> > I have a VirtualBox VM running Debian with network in Host-Only mode.  I 
> > want to use this rather than Bridging to reduce the possibility of layer 2 
> > attacks on my LAN in case Debian gets compromised.  For this same reason I 
> > want to aim the dnat right at the router.
> > 
> > So the VM interface on the host is vboxnet0 with IP 192.168.12.1.  The 
> > hosts outward-looking interface is wlan0 with IP 192.168.11.1, and the 
> > router is 192.168.11.5.
> > 
> > interfaces:
> > net         wlan0           detect          blacklist,nosmurfs,tcpflags
> > local       vboxnet0        detect          detectnets
> > 
> > zones:
> > fw          firewall
> > net         ipv4
> > local               ipv4
> > 
> > masq:
> > wlan0:192.168.11.5          192.168.12.0/30
> > 
> > rules:
> > DNAT                local   net:192.168.11.5        tcp     ftp,http
> > ACCEPT              local   net             tcp             ftp,http,https  
> > -
> > ACCEPT              local   net             udp             domain  -
> > 
> > ... but it tain't working.  with dmesg I get lots of these:
> > [178641.995837] martian source 192.168.11.5 from 192.168.12.1, on dev 
> > vboxnet0
> > [178641.995842] ll header: ff:ff:ff:ff:ff:ff:08:00:27:ca:f8:5c:08:06
> > [178644.651678] martian source 192.168.12.255 from 192.168.12.1, on dev 
> > vboxnet0
> > [178644.651688] ll header: ff:ff:ff:ff:ff:ff:08:00:27:ca:f8:5c:08:00
> > [178650.947681] martian source 192.168.11.5 from 192.168.12.1, on dev 
> > vboxnet0
> > [178650.947686] ll header: ff:ff:ff:ff:ff:ff:08:00:27:ca:f8:5c:08:06
> > 
> > Can't figure out what's wrong.
> > 
> > I'm recommending that people run a Tor relay in a VirtualBox VM with Debian 
> > SELinux guest, with guest and host running Shorewall, masqueraded through 
> > the host and aimed straight at the router so no monitoring can take place 
> > if compromised.
> 
> martians are a routing problem, not a Shorewall configuration problem.
> The routing table doesn't route 192.168.12.1 out of vboxnet0.

Oh dear, in that case I have no idea what to do about it.






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