I need some suggestions for implementing failover between two ISP's.
Currently I use OpenBSD 2.9 with IPF, but would like to upgrade to ver. 3.4
with PF.
This is my current topography:
DMZ
^
|
|++++++++++| My OpenBSD box is bridging between the ISP,
|--ISP A --> | OpenBSD | DMZ and my LAN. Works very well.
|++++++++++|
|
+-- LAN
This is what I would like to accomplish:
DMZ
^
|
|++++++++++|
|--ISP A --> | OpenBSD | <-- ISP B --|
|++++++++++|
|
+-- LAN
I'm not concerned with incoming traffic. Only goal here is to send all out
going traffic via ISP B if ISP A is not available. I would like to keep it
transparent, but not absolutely required.
Any suggestions, pointers, links to articles, manuals etc. will be greatly
appreciated.
Thanks,
Boyko
