Re: vpnc and determining correct routes



Hello.

On Mon, 2006-10-23 at 09:43, Dan Williams wrote:
> On Mon, 2006-10-23 at 15:01 +0200, Stefan Schmidt wrote:
> 
> Right; there's a proliferation of options here.  We have a few
> situations:
> 
> - Admins route all traffic through VPN, user wishes to override (vpnc
> plugin already handles this case)

Perhaps a problem with network policy, but the user can override this
at the commandline anyway. Should be fine.

> - Admins push split networks, but user wishes to override one or more

Just to don't get you wrong. The split-net routing is not working
without manually setting routes yet, right? As this it was Thomas was
talking about.

> What's needed here is an extension of the current routing preferences.
> We likely need two lists, one for "route only these netblock over the
> VPN explicitly" and a second for "never route these netblocks over the
> VPN".
> 
> The next problem is split DNS; do people care about that?  Ideally we
> only query the VPN nameservers for names in a certain domain (passed
> vpnc as CISCO_DEF_DOMAIN).  Sometimes though, admins don't push the
> default domain and you have to manually fill it in for a split network
> setup.  But that requires using named as a local caching nameserver,
> which people, for some inconceivable reason, are very vocally against.
> So right now all DNS queries go over the VPN.
> 
> So basically, we have to modify the user interface to:
> 
> - Add a "Never route these over VPN" entry
> - Add an "Override default domain name" entry
> - Modify the vpnc service daemon to push split networks to NM

Same as above. vpnc-plugin don't know the pushed routes yet, right?

Sorry for bother about this again and again, but I like to make sure I
understand it right.

> - Make NM do split DNS if requested
> 
> This stuff won't get into 0.6.4, but I'd certainly accept patches for
> 0.7/HEAD.  If I could find time to work on it in between dbus-ifying
> wpa_supplicant, the new config framework, and multiple active devices,
> I'd take a look at it :)

That sounds like a lot work.

Is the original author of the vpnc-plugin still working on it? Sorry,
did not check the cvs for a long time.

regards
Stefan Schmidt

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