Route filtering

[karmesh]

Hi Guys,

Is there a way to prevent the unwanted routing related to Provider's managed CE WAN router from being propagated to the Fortigate?Can we do some kind of filter or access list on the fortigate?

The protocol between the provider and FG is OSPF and we are redistributing OSPF into BGP on the provider managed CE router.

Hope you guys can give me some idea over here.

Thank you.

Rgds,

Mesh

[Benoit_Rech_FTNT]

Hello,

you can control route redistricution from OSPF to BGP using route-map. 

#config router bgp

#...

#config redistribute ospf

#set status enable

#set routemap OSPF2BGP

#end

#end

...

You have an example for OSPF in this KB: http://kb.fortinet.com/kb/microsites/search.do?cmd=displayKC&docType=kc&externalId=FD32884, but it's similar for BGP...

Benoit

[emnoc]

You should define a prefix-list with route-map, but the LSA will still be in the ospf database. Alternatively you could ask the provider to filter  or install blackhole routes for the destinations that you don't want, &  with uRPF checks that should squash any traffic for those destinations.