IP "routing" issue

[Abelenda Diego]

Hello,

Thank you for pointing route "-iface" however I can't seem to manage what I
want.

When I use:
"route add -host $IP_NOT_IN_SUBNET -iface bce0"

I get "netstat -rn" to say someting like:

Internet:
Destination        Gateway               Flags     Netif Expire
default            $UPSTREAM_GW          UGS        bce0
10.0.0.1           link#7                UHS         lo0
$IP_NO_IN_SUBNET   $MAC_ADDRESS_OF_BCE0  UHS        bce0


Which seem somehow appropriate, so I try to ping $IP_NOT_IN_SUBNET and I get:

root at opnsense2:~ # ping $IP_NOT_IN_SUBNET
PING $IP_NOT_IN_SUBNET ($IP_NOT_IN_SUBNET): 56 data bytes
36 bytes from $UPSTREAM_GW: Redirect Host(New addr: $PUBLIC_IP_OF_BCE0).

Which doesn't seem appropriate at all wrt the routing table...

Did I use "route add" wrong?

Also I want to keep the setup simple, going through private IPs on the public VLAN of the datacenter might get me in trouble with them, and using other VLANs for that will be a pain.

Best regards,
Diego Abelenda


On Wed, 9 Sep 2020 17:35:45 +0200
kaycee gb <kisscoolandthegangbang at hotmail.fr> wrote:

> Le Wed, 9 Sep 2020 16:42:54 +0200,
> Abelenda Diego <diego.abelenda at gmail.com> a écrit :
> 
> > Hello,
> > 
> > I've got a FreeBSD installation in a DataCenter that provided me with a
> > single address IPv4 with an upstream gateway (cidr is fine the upstream
> > gateway works everything is nice and running). I use this machine for
> > Masquerading an private infrastructure.
> > 
> > Now I need other machines with public IPv4 and when I requested the
> > additional IPv4 to the DataCenter, they gave me a bunch of /32 addresses
> > saying that my previous IPv4 MUST be configured as next-hop on their side.
> > From my understanding in FreeBSD the route command is unable to perform this
> > kind of configuration where you tell that the IPv4 /32 is available without
> > next-hop (no via) on a specific link. I know the linux "ip route add $IP dev
> > $LINK" configures this, but I cannot seem to map this knowledge to FreeBSD.
> > 
> > Is it possible to perform this very special setup with any command on
> > FreeBSD? If yes what is that command?
> > 
> > Best regards,
> > Diego Abelenda  
> 
> Hi,
> 
> Do the other machines have a private address ? Is it a problem if they have
> one ? 
> If it is possible, you can route via this private address on your FreeBSD
> installation to the new one and assign a public/32 to the last.
> 
> Alternatively to doing routing like above, if you have a firewall enabled on
> the first machine, you can do address forwarding between the first and the
> new one. 
> 
> And last, maybe with something like -iface from "route" you can achieve what
> you want. 
> 
> K.
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