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I have an Ubuntu 12.10 workstation with the following interfaces:

eth0 :
lo:1 :
lo:2 :
tap0 :

As you can see, all IPs fit in subnet.

Also I have Quagga on it that announces my link states to the other routers via OSPF. Here is my /etc/quagga/ospfd.conf:

router ospf
   passive-interface eth0


   redistribute kernel route-map MYMAP
   redistribute connected route-map MYMAP
   redistribute static route-map MYMAP

   network area

   ip prefix-list MYLIST seq 5 deny le 32
   ip prefix-list MYLIST seq 10 permit le 32
   ip prefix-list MYLIST seq 20 deny any

   route-map MYMAP permit 10
   match ip address prefix-list MYLIST

I'm failing in attempts to prevent Quagga from advertising route which is my local subnet.

Neither ip prefix-list MYLIST seq 5 deny le 32 nor ip prefix-list MYLIST seq 5 deny has no influence on the route advertising. The strangest thing is that Quagga keeps advertising routes even in case I change all prefix-list actions from permit to deny. Do you have any ideas what am I doing wrong?

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1 Answer 1

It looks like you should be using something like

distribute-list noeth0 out kernel
access-list noeth0 deny
access-list noeth0 permit any

The Quaggga OSPF daemon documentation is a bit vague there, though - you probably would have to tweak this a bit.

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Is that a good idea to allow everything in the end? –  Fmy Oen Jan 16 '13 at 9:19
@FmyOen this is not an "access list" in terms of security, it is just a list specifying a rule set to match against - in this case for a distribute-list directive which is doing route filtering based on the rule set. So what it should do is allow distribution of all kernel routes but the ones to –  the-wabbit Jan 16 '13 at 10:50

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