Cisco - DMZ Question

Hi All,

Having a mental blank here.

I have created a DMZ on my Cisco ASA 5510 and I want it to be able to access the internet.

So my server in the DMZ is only allowed to talk to the LAN for SMTP and HTTPS, which I have setup on the firewall.

But I also want the DMZ Server to have internet access. Should I allow it access to the LAN DNS Servers, if so how do I do this, or should it use a public DNS server, if so how should I do this?

Thanks very much.

Paul
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essexboy80Asked:
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zwart072Commented:
configure nat for your dmz

nat (dmz) 1 0 0
global (outside) 1 interface
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tahussleCommented:
So I take it you can ping external servers via IP from the DMZ?

e.g ping 4.2.2.1



use a public dns server as you want to keep your DMZ network seperate from internal

You can use the Open DNS servers

http://www.opendns.com/start/

208.67.222.222
208.67.220.220
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Hilal1924Commented:
Actually If you have configured DNS on your ASA and can assign it, that should do it. What is the current DNS setting on the DMZ Server ?

Cheers,
Hilal
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essexboy80Author Commented:
Hi All,

At present I cannot ping external sources from the DMZ Server.

How do I add the NAT setting via the ASDM?

Thanks
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tahussleCommented:
if you have a different public IP you want to assign to the DMZ you can use

global (DMZ) 102 publicIP netmask 255.255.0.0

where 102 would be your access-list

nat (dmz) 101 0.0.0.0 0.0.0.0

or use the e.g by zwart072 above
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