Passive routes with OSPF on the PIX

Hello

Having just upgraded my PIX to software v8 finally hoping to participate in OSPF on the network.

The PIX have all many DMZ I want to advertise on OSPF to remove a * much * of fragile static routes but of course I would * not * advertise or get OSPF of these demilitarized. I thought I could do these interfaces passive - or better still, question:

router ospf 1
passive-interface default

And then exempt only the internal interface.

However, (unlike IOS) it seems to be without notion of passive in the implementation of OSPF from the PIX - a place where I thought it would be very useful...

How to distribute the these DMZ on OSPF without advertising OSPF in them?

I had planned to use:

redistributed connected subnets

However, which redistributes things like the public interface of the Internet, I don't want to. In addition, even if there is a way to stop there including the public interface, it seems more prone to the error of the user than passive by default with one exception.

Any ideas? If this is not the case, can I restrict the interfaces in connected subnets redrawn?

Thanks for all the ideas!

Hi Peter,.

Thank you, Yes... I was suggesting to remove network dmz under the OSPF process commands.  As you said, it used to really do what you want to do with the removal of the static since its disabling ospf for this network.

Start-up eigrp would seem to be a lot of extra work just to eliminate the static if that's what it will be used for, but it would allow you to make the passive interface that would not accomplish snd/RRs eigrp on the specific interface.

I just re-read your first message and I think I understand now what you're after - which goes back to your first survey of redistribution... you can redistribute static electricity and use a road map to control what roads you want to redistribute.  You can then remove the networks for the demilitarized zone under router ospf process.

example:

access-list ospfredist standard permit 10.10.10.0 255.255.255.0
access-list ospfredist standard permit 192.168.10.0 255.255.255.0

route-map static-ospf
  match ip address ospfredist

router ospf 10
  redistribute static subnets route-map static-ospf

this should redistribute only the statics that you listed above.

hope this helps a bit.

-scott

Tags: Cisco Security

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