Access control between VLANs - Cisco ADSL 877 Router

Unanswered Question
May 7th, 2007

Hi,

I need to setup 2 VLANs on the 877 Router and there is a need to ACL the 2 VLANs I create on the router.

How would I go about doing that?

I have this problem too.
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Paolo Bevilacqua Mon, 05/07/2007 - 02:26

1st: Verify you have "advanced services" software to supports VLANs

2nd. Configure ACL for permity/deny. Apply ACL to interface with "ip access-group XX input"

Hope this helps, please rate post if it does!

bradlesliect Mon, 05/07/2007 - 05:08

Thanks this info did help.

Lets take this a bit further.

I have 2 VLAN's

VLAN 1 = 192.168.10.x (Fast Ethernet0 is on VLAN 1)

VLAN 2 = 192.168.100.x (Fast Ethernet0 is on VLAN 2)

Both Vlans have domain controllers and the 100.x vlan has a Terminal server configured that both need access to. I want to allow access to these resources ONLY.

Basically no other traffic should pass through these 2 vlans except this.

Would the access list look something like this:access-list 111 permit ip 192.168.10.0 0.0.0.255 192.168.100.0 0.0.0.255

access list 111 permit ip 192.168.10.0 0.0.0.255 host 192.168.100.x 255.255.255.255

Which interface(s) would I apply this to?

Thanks

Paolo Bevilacqua Mon, 05/07/2007 - 06:52

Hi,

the first line allow unlimited communication between the two vlan's

The second one allows 192.168.100.0 to access one host only on the other vlan, note the 255.255.255.255 is not necessary because you have specified host.

In any case the the ACL goes on the VLAN that you are limiting, one only is enough.

Hope this helps, please rate post if it does!

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