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Allow email access from seperate VLAN

Posted on 2004-10-26
Medium Priority
Last Modified: 2010-04-10
Have a VLAN that is on set to

Our mail server is a different VLAN network...

Need certain users on the VLAN to be able to get email from the network...I have a core switch 4507R, what sort of access-list needs to be put in?
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Expert Comment

ID: 12414708
This sounds like more of a subnetting problem than access list.

Are you using a router between the networks?  
you need someway to get from the 127.17.x.x. network to the 127.16.x.x network

Just my first thoughts
LVL 79

Accepted Solution

lrmoore earned 1000 total points
ID: 12415546
Do you already have access-lists? Do you have the layer 3 routing configured in your switch?


Author Comment

ID: 12425218
I do have layer 3 routing configured on the switch...I also have a LAN to LAN setup between this network and ours...I HAVE A CORRECTION: Their network is provided by their ISP.  I now have a LAN to LAN configured between their office and mine.  Their outside IP is 209.40.171.x  I want to be able to provide access to our email server for EXCHANGE and POP mail.  Please advise.

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LVL 79

Expert Comment

ID: 12425276
Where is this LAN-LAN setup ? Is it a VPN tunnel? Hard wired? Different VLAN?
Where do you have this access-list applied? It appears to be an outbound access-list....
Where is your exchange/pop server in realation to this?
I'd have to see the complete config of your 4507R to be much more help.. I need the big picture here..

Author Comment

ID: 12425312
LAN to LAN is from PIX 501 to Concentrator 3000...yes, it is a VPN tunnel.  No NOT a different VLAN.  The exchange server is on 172.16.0.x network.  In the concentrator I have defined network lists that associate with only certain ip's on the 172.16.0.x network...these are working fine...except for mail.  
LVL 79

Expert Comment

ID: 12428138
Does your network list on the 3000 include the mail server lan? I assume yes since everything else works.
Any other restrictions on the 3000 access-list?
Is there an acl applied to the VLAN interface facing the 172.16.0.x subnet where the server lives? You posted an acl for the 172.17.0.x VLAN...

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