Quick question: Can a router be told not to route from specific subnets to other subnets, or is that a firewall only thing? EG:
In article , snipped-for-privacy@gmail.com wrote: :Quick question: :Can a router be told not to route from specific subnets to other :subnets, or is that a firewall only thing? :EG: :192.168.30.x -> 192.168.100.x allowed :192.168.30.x -> 192.168.101.x not allowed
It depends on the router. Cisco's term for this would be Policy Based Routing (PBR). It would look something like (approximately)
access-list 101 permit 192.168.30.0 0.0.0.255 192.168.101.0 0.0.0.255
route-map RestrictMap 10 match address 101 route-map RestrictMap 10 set interface Null0
That is, you would take the flows you do not want, and send them to the bit bucket.
If there is no corresponding entry in the routing table, then a router will not route into a network.
If you want routes like "from A to B, from A to C, but not from B to C" then sometimes you need filtering.
Yours, VB.
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