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Have 2 VLAN's. Need devices on 1 VLAN to access 1 device on other VLAN

Posted on 2012-04-03
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Last Modified: 2012-04-23
I have VLAN11 and VLAN12.  VLAN11 is my production VLAN and VLAN12 is setup just for public wifi access and it cannot see VLAN11.  Now, I would like VLAN12 to be able to talk to just one of my printers on VLAN11.  How can I do this?

I have Cisco 3750 switches and an ASA 5510 firewall.  The ASA is providing DHCP to VLAN12 (the public wifi vlan).  There is  a sub-interface on the ASA that is on VLAN12.

Any help is appreciated!

Thanks.

Mark
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Question by:cansib
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4 Comments
 
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neilpage99 earned 2000 total points
ID: 37802725
Assuming both VLAN11 and VLAN12 are connected to the ASA, you need to create and access-list or add to an existing access-list an 'exception' that allows all of VLAN12 to access a single 'host' (i.e. printer) on VLAN11. Without seeing your ASA config, here is an example:

access-list my_access_list extended permit ip VLAN12 255.255.255.0 host printer1 255.255.255.255

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Or if you need tighter restrictions, you'll have to look up necessary printer tcp port numbers an restrict to those.
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Author Comment

by:cansib
ID: 37802798
So, would that ACL be on the ASA or the Switch?  And if on the ASA, would I do that on the Inside interface (VLAN11) or that sub-interface for the public wifi?

Thanks!

Mark
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Author Comment

by:cansib
ID: 37802824
I use ASDM....
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LVL 9

Expert Comment

by:neilpage99
ID: 37825235
I never use ASDM; I rather prefer CLI as I gain much tighter control.

The access-list that allows access to your printer would be added to the sub-interface of your ASA - the interface that is connected to your WiFi VLAN.
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