On Thu, Oct 30, 2008 at 09:19:48AM +0000, Chris Hastie wrote:
> Is it possible to set a default source address on a machine?
> I have an ADSL connection with a fixed IP and a further /29 routed to
> it. Until recently I used an ADSL router which acquired the connection
> IP, and then the first of the /29 on the internal interface.
> In an effort to conserve both IPs and the number of machines I have
> running I have recently changed to using an ADSL modem (Vigor Draytek
> 110) which essentially does no more than change the PPPoA to PPPoE. A
> FreeBSD machine then handles the connection using ppp.
> The machine in question has always used one of the /29 addresses, and
> continues to do so (this is assigned to its DMZ facing NIC, vr0). Now,
> of course, outgoing packets are using the connection address, which is
> assigned to tun0.
> Whilst I can override this on an application by application basis for
> many things (eg postfix smtp_bind_address parameter, ping -S switch) is
> there any way to override it system wide, so that the address from the
> /29 is used by default?
> I think I succeeded in doing something similar for an IPv6 tunnel by not
> assigning an IP address to gif0 and configuring the routing as follows
> in rc.conf:
> ipv6_defaultrouter="-interface gif0"
> But I'm not clear whether this would work with ppp, and if so, how to do it.

Try freebsd-net?

| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |

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