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Cisco ASA5505 DMZ setup with ASDM

Posted on 2011-10-12
Medium Priority
Last Modified: 2012-05-12
I am trying to setup a new router with a DMZ interface. How to I setup this interface using ASDM and allow users connected to this interface to reach the internet? I don't want the DMZ to be able to communicate with the inside interface.
Question by:adanser83
  • 3
  • 2
LVL 12

Expert Comment

ID: 36957162
Set your interface to be a DMZ:

interface Ethernet0/2
 nameif mirth
 security-level 50
 ip address

You must NAT your DMZ traffic. You probably have a line like this:
global (outside) 10 interface

This nat's all traffic on set '10' to the IP address of the outside interface. Assuming yours is the same, then you need:
nat (DMZ) 10

That should be it.
LVL 12

Expert Comment

ID: 36957182
If you insist on using ASDM, try this link:


It's for the PIX but it's very similar if you are familiar with the concepts. If you post your full config with passwords and public IP address removed, we can post a customized config you too.

Author Comment

ID: 36957263
Here is my current config:

Result of the command: "show run"

: Saved
ASA Version 8.2(5)
hostname ciscoasa
enable password 6ZoFBEConbp3Z7DJ encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
name XO-Gateway
name SEO1-IN
name SEO1-OUT
name SEO2-IN
name SEO2-OUT
name SEO3-IN
name SEO3-OUT
name SEO4-IN
name SEO4-OUT
name SEO5-IN
name SEO5-OUT
name SEO6-IN
name SEO6-OUT
interface Ethernet0/0
 switchport access vlan 2
interface Ethernet0/1
interface Ethernet0/2
 switchport access vlan 3
interface Ethernet0/3
interface Ethernet0/4
interface Ethernet0/5
 switchport access vlan 12
interface Ethernet0/6
interface Ethernet0/7
interface Vlan1
 nameif inside
 security-level 100
 ip address
interface Vlan2
 nameif outside
 security-level 0
 ip address 71.5.x.x
interface Vlan3
 no forward interface Vlan1
 nameif DMZ
 security-level 50
 ip address
ftp mode passive
object-group service DM_INLINE_SERVICE_1
 service-object icmp
 service-object icmp echo-reply
access-list outside_access_in extended permit tcp any any eq ssh
access-list outside_access_in extended permit tcp any any eq telnet
access-list outside_access_in extended permit tcp any any eq www
access-list outside_access_in extended permit tcp any any eq https
access-list outside_access_in extended permit object-group DM_INLINE_SERVICE_1 any any
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
mtu DMZ 1500
ip local pool IP-Remote-VPN mask
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1
nat (DMZ) 0
static (inside,outside) SEO1-OUT SEO1-IN netmask
static (inside,outside) SEO2-OUT SEO2-IN netmask
static (inside,outside) SEO3-OUT SEO3-IN netmask
static (inside,outside) SEO4-OUT SEO4-IN netmask
static (inside,outside) SEO5-OUT SEO5-IN netmask
static (inside,outside) SEO6-OUT SEO6-IN netmask
access-group outside_access_in in interface outside
route outside XO-Gateway 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
aaa-server PTMS-AD protocol ldap
aaa-server PTMS-AD (inside) host
 timeout 5
 server-type auto-detect
http server enable
http inside
http inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd auto_config outside

threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
 enable outside
 svc image disk0:/anyconnect-win-2.5.2014-k9.pkg 1
 svc enable
group-policy PTMS-RemoteVPN internal
group-policy PTMS-RemoteVPN attributes
 vpn-tunnel-protocol svc
tunnel-group SSL-VPN type remote-access
tunnel-group SSL-VPN general-attributes
 address-pool IP-Remote-VPN
 authentication-server-group PTMS-AD
 default-group-policy PTMS-RemoteVPN
prompt hostname context
call-home reporting anonymous prompt 1
: end
LVL 12

Accepted Solution

jjmartineziii earned 2000 total points
ID: 36957315
I believe your problem is this line:

nat (DMZ) 0

You are performing NAT exemption.

Try adding these lines:

no nat (DMZ) 0
nat (DMZ) 1

Author Comment

ID: 36957366
Thank you for your help I will try these changes after hours and let you know tomorrow.

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