Re: default route problem

["Vitja Makarov" <vitja makarov gmail com>]

DHCP provides default route, but when you bring pptp up, you may want
to use ppp device as default route, e.g internet.
Then if you'll replace default one with ppp, then you will loose route
to pptp server.

2008/10/6 Stuart Ward <stuart ward bcs org>:
> Am I missing something obvious, but shouldn't the DHCP server provide
> the default route to the client.
>
> eg my dhcpd.conf
>
> subnet 192.168.0.0 netmask 255.255.255.0 {
>        option routers 192.168.0.4;
>        range 192.168.0.10 192.168.0.50;
>        option netbios-name-servers 192.168.0.2;        #wins server
> }
>
> Where 192.168.0.4 is the default router
>
> -- Stuart Ward M +44 7782325143
>
>
>
> On Mon, Oct 6, 2008 at 12:51 PM, Vitja Makarov <vitja makarov gmail com> wrote:
>> Hi, all!
>>
>> Home ISP often use the following network configuration scheme:
>>
>> - Lan IP address is assigned using DHCP
>> - PPTP is used for internet connection
>>
>> If pptp server is in your network, that should be ok to replace
>> default route with ppp one,
>> but when pptp server is routed via DHCP provided default route, you
>> can't simply do it,
>> you have first provide manually route for pptp server, then remove default.
>>
>> Can we solve a problem this way:
>> - user should choose which networks he want to route using DHCP default route
>> - then add pptp server to this list
>> - build rules and change routing table
>> - then remove default route, or increase metrics
>> - launch pppd
>> - if failed restore previous settings
>>
>>
>> That should make pptp configuration less painful on linux desktop.
>> That should be useful for all other kinds of PPP as well.
>>
>> I can provide some sample code in few days, using libnl.
>>
>> Thanks,
>> vitja.
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>

vitja.