On Thu, Oct 30, 2008 at 09:19:48AM +, 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 Chadwickjdc 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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