On Mo, 2016-09-26 at 22:15 -0500, Lonnie Abelbeck wrote:
> On Sep 26, 2016, at 8:42 PM, Armin Tüting <armin.tueting@tueting-onli
> ne.com> wrote:
> 
> > 
> > On Mo, 2016-09-26 at 14:31 -0500, Lonnie Abelbeck wrote:
> > > 
> > > On Sep 26, 2016, at 1:16 PM, Armin Tüting <armin.tueting@tueting-
> > > onli
> > > ne.com> wrote:
> > > 
> > > > 
> > > > 
> > > > > 
> > > > > 
> > > > > > 
> > > > > > 
> > > > > > ip route
> > > > > > default via 192.168.60.1 dev eth0  metric 2 
> > > > > > 192.168.10.0/24 via 192.168.40.1 dev eth1  metric 1 
> > > > > > 192.168.40.0/24 dev eth1  proto kernel  scope link  src
> > > > > > 192.168.40.6 
> > > > > > 192.168.50.0/24 via 192.168.40.1 dev eth1  metric 1 
> > > > > > 192.168.60.0/24 dev eth0  proto kernel  scope link  src
> > > > > > 192.168.60.6
> > > > > > 
> > > > > > Armin.
> > > > > 
> > > > > Your network CIDR's look fine.
> > > > > 
> > > > > Where are the "metric 1" routes coming from ?:
> > > > > --
> > > > > 192.168.10.0/24 via 192.168.40.1 dev eth1  metric 1 
> > > > > 192.168.50.0/24 via 192.168.40.1 dev eth1  metric 1 
> > > > > --
> > > > > are you adding those manually ?
> > > > Yes!  I've added them through /mnt/kd/rc.elocal!  They're
> > > > static
> > > > routes
> > > > off eth1!
> > > > 
> > > > > 
> > > > > 
> > > > > Where are the 192.168.10.0/24 and 192.168.50.0/24 networks in
> > > > > your
> > > > > configuration ?
> > > > I've added them through /mnt/kd/rc.elocal
> > > 
> > > OK, we are at the point where we need to draw a picture, I'll
> > > start,
> > > edit anything I got wrong:
> > > 
> > > 192.168.60.6/24 - eth0 External - APU1 - LAN eth1 -
> > > 192.168.40.6/24
> > > 
> > > How do the 192.168.10.0/24 and 192.168.50.0/24 networks fit in ?
> > 192.168.40.1/24 - switch - 192.168.10.0/24
> > 192.168.40.1/24 - switch - 192.168.50.0/24
> > Clearly the subnets are "behind" AstLinux on a different device...
> 
> Ahhh, so I presume that is a fancy layer-3 switch which is routing
> the 192.168.10.0/24 and 192.168.50.0/24 networks via 192.168.40.1 ?
Right :)

> We recently added (AstLinux 1.2.7) a user.conf variable
> NAT_FOREIGN_NETWORK to allow these downstream networks to reach eth0
> and beyond.
> -- user.conf snippet ---
> NAT_FOREIGN_NETWORK="192.168.10.0/24 192.168.50.0/24"
> --
> More Info: http://doc.astlinux.org/userdoc:tt-internal-downstream-rou
> ter
> 
> Of course your 192.168.10.0/24 and 192.168.50.0/24 networks can SSH
> 192.168.40.6 and get to the AstLinux box without NAT_FOREIGN_NETWORK
> defined, but if these networks want to reach outside eth0 and get to
> the internet, then NAT_FOREIGN_NETWORK must be defined to NAT with
> eth0.
OK - I'll add the above setting and confirm back!

BTW - Does 'IP_FORWARDING=0' disable the whole FORWARD chain?

> Clear ?
Got it :)

Thanks for help and passion!

Regards,
Armin.

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