2 inet connections

[Devon H. O'Dell]

Claudiu Dragalina-Paraipan wrote:
> Hi,
> 
> I have this situation: 2 inet connection at 2 different ISP, one with 
> 2Mbps and one with 128kbps; and a big NATed network behind it, and a 
> small group of real addresses.
> I want to do this: use the first connection as "primary" connection, and 
> if this fails, go to the second connection, as a backup.
> The problem is that none of the ISP will help me in any way, so I have 
> to find a solution by my own.
> 
> I am trying to avoid the making of a software that watches the 
> connections and "declare" a line dead when no TCP connection can be 
> made, thus switching to the secondary/backup line.
> I realize that there is no way of using the group of real addresses on 
> the backup line, since they are not routed, but this is not of such 
> importance. I need only to provide Internet connection for the NATed 
> network.
> 
> So... can someone provide me with some good practical advice for this 
> situation ?
> 
> NOTE:
> I want to use FreeBSD for this, so FreeBSD specific advices are welcome. 
> In fact I don't even think of other solution.
> 
> I realize that this is not a very common situation, and I hope I have 
> explained it sufficiently clear.
> 
> Thank you very much.
> 
> Best regards,

You might want to look at various patches for FreeBSD multipath routing 
that are available via the mailing lists. They're pretty easy to find 
with a search for FreeBSD Multimath routing via google.

--Devon