Re: [Openvpn-users] openvpn netmask query

[Jason Keltz <jas@xxxxxxxxxxx>]

On Sat, 4 Jun 2005, ksp - knetdome wrote:

> okay, i think i misunderstood your initial post but i !think! i
> understand now. so, try this explanation on for size -- tun
> interfaces don't use netmasks on the interfaces themselves.
> well, they do, but it's always and only 255.255.255.255 which
> specifies a host-host netmask and that's the only mask a ptp
> link understands since it is, by definition, point-to-point
> meaning there are no other hosts involved... it's only one end
> or the other.
>
> if you wan't the openvpn interfaces themselves to use normal
> netmasking then you'll need to specify tap devices instead of
> tun,
>
> hth,
> ksp

hmm .. what I was trying to do was to break down 172.16 with a 4 bit 
subnet and 12 bit host so that I could get the number of hosts I 
wanted.. I was going to use each "subnet" for a separate vpn.  Initially I 
would have 2, but I would have plenty of room to grow using this scheme 
numbering scheme..

If I want to stick with a tun interface, and keeping in mind what you have 
said, if I understand correctly.. can I instead do this..

my vpn1 network consists of 172.16.1.1 through 172.16.1.254 AND
172.16.2.1 through 172.16.2.254 AND 172.16.3.1 through 172.16.3.254

and my vpn2 network similarly consists of 172.16.4.1 through 172.16.4.254,
172.16.5.1 through 172.16.5.254 and 172.16.6.1 through 172.16.6.254.

then the netmask of 255.255.255.255 shouldn't pose a problem.. correct?

jas.

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