Hi Arne,

Arne Schwabe wrote:
Am 11.07.14 10:51, schrieb Jan Just Keijser:
On 11/07/14 10:00, Philipp Hagemeister wrote:
On modern systems, topology subnet should always be set, but it's
missing in the configuration file.
Add it with a short explanation.
NACK
There are a few annoying issues with
  topology subnet
esp when using server side things like
  route <remote subnet> <mask>

that will *fail* with 'topology subnet' ; until this is fixed this should NOT be considered the default.

I am confused here, route <remote subnet> <mask> would expand to

route <remote subnet> <mask> remote_gw in p2p, net30 and subnet toplogy. And that should work in all topology modes. What am I missing here?


this is a long standing bug, check out the recent thread on the openvpn-users mailing list Re: [Openvpn-users] ping tests mostly work. all OK, except Server->Client private IP. *almost* there!

On Mon, Jul 07, 2014 at 11:41:31AM -0700, pg0...@fastmail.fm wrote:

> Switching back to `verb 3`, @Server log on server START
> > (not SUPPOSED to be wrapping, at least it doesn't in the web editor --
> just in case: http://pastebin.com/KmChijWX )

"Wrapped like hell".  Is there no way to do attachments in the web thingie?

Anyway:


> there's a suspect problem
> > Mon Jul 7 10:52:42 2014 OpenVPN ROUTE: OpenVPN needs a gateway
>    parameter for a --route option and no default was specified by
>    either --route-gateway or --ifconfig options
>    Mon Jul  7 10:52:42 2014 OpenVPN ROUTE: failed to parse/resolve
>    route for host/network: 192.168.1.0
> > which looks like a possible culprit.

... indeed.  This is, uh, stupid code, and I think we already have a trac
ticket for it...


> If yes, what's missing in OpenVPN config, and where?

--route 192.168.1.0 255.255.255.0 10.0.0.8

("just any IP address that's inside your tun subnet, and not the first").

This is really not *necessary*, but the way the code does tun & tap and
net30 & subnet, it gets confused about things.  Needs fixing, sorry for
that.



so in some cases a server-side statement
 route 192.168.1.0 255.255.255.0
works fine with 'topology net30' but NOT with 'topology subnet'.

This is a long standing bug that needs to be fixed before we can forcefeed 
everybody 'topology subnet'.

JJK




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