• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 369
  • Last Modified:

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
0
essexboy80
Asked:
essexboy80
2 Solutions
 
zwart072Commented:
configure nat for your dmz

nat (dmz) 1 0 0
global (outside) 1 interface
0
 
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
0
 
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
0
 
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
0
 
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
0

Featured Post

Turn Raw Data into a Real Career

There’s a growing demand for qualified analysts who can make sense of Big Data. With an MS in Data Analytics, you can become the data mining, management, mapping, and munging expert that today’s leading corporations desperately need.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now