On 31/03/2015 03:40, Adam Thompson wrote:
> Sadly, I know several xDSL providers who offer a default gateway not in
> the client's subnet. (LOL: my phone auto-corrected "subnet" to
> "fuckety". No kidding.)
> Linux and Windows and MacOS can deal with this level of brain-deadness,
> *BSD cannot.
Not quite true, for a point to point interface FreeBSD will accept the
-interface option for a route (route out of the interface, rather than
to an IP) not uncommon as a way to economise on IPs among ISPs.
[root@vm ~]# route add 192.160.34.0/24 -interface gif0
add net 192.160.34.0: gateway gif0
[root@vm ~]# route get 192.160.34.0
route to: 192.160.34.0
destination: 192.160.34.0
mask: 255.255.255.0
fib: 0
interface: gif0
flags: <UP,DONE,STATIC>
recvpipe sendpipe ssthresh rtt,msec mtu weight expire
0 0 0 0 1280 1 0
[root@vm ~]#
Not suggesting its particularly sensible just thats its doable.
Vince
> However, the good news is that if your network is so broken that you're
> trying to route out an interface with a /32, changing that to a /31 is
> unlikely to break anything more than it's already broken.
> -Adam
>
> On March 30, 2015 1:17:55 PM CDT, Walter Parker <[email protected]> wrote:
>
> A /32 net mask is not used for used for regular routing interfaces.
> It has a specialized use, usually used for virtual interfaces. On a
> Cisco router, it would be used for a loopback interface. It is
> sometimes used as the subnet mask for an IP alias address on host
> systems (where all routing is done using the primary IP address).
>
> If the WAN interface exists on a network block with another IP
> address, what is the subnet of that interface? If it doesn't what
> does it matter what the subnet is, as a subnet mask is really only
> relevant on an actual network.
>
>
> Walter
>
> On Sat, Mar 28, 2015 at 8:42 AM, day knight <[email protected]
> <mailto:[email protected]>> wrote:
>
> Hello All:
>
> I see the configuration script doesn't allow you to pick /32
> address when configuring an interface as my default gateway is
> not in the same subnet. I have limited IPs and run pfsense from
> vmware. How can i override and assign /32 ip address to wan
> interface.
>
> I have done this in other linux and windows distros but since
> pfsense is customised kernel and i don't want to break any
> functionality, how would I be able to do this. Can I manually
> assign/configure em0 instead of suing the utility without
> causing any issues?
>
> thanks
>
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> men of zeal, well-meaning but without understanding. -- Justice
> Louis D. Brandeis
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