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Replies

Issues adding a DMZ

Simon.peters1
Level 1
Level 1

Hi all,

I am having an issue when adding a DMZ to my asa. As soon as I add the below command it stops the internet working on the pc's connected to the asa.

Can anyone shed some light as to why?

As soon as I add the below it kicks the internet out.

interface Ethernet0/1
switchport access vlan 3
Interface vlan3
nameif dmz


Script is below.

ASA Version 8.4(4)1
!
hostname ASA-TEST
enable password TEST
passwd TEST
names
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
interface Vlan1
nameif inside
security-level 100
ip address 10.0.0.5 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
pppoe client vpdn group BTI
ip address pppoe setroute
!
interface Vlan3
no nameif
security-level 10
ip address 172.16.1.168 255.255.0.0
!
ftp mode passive
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network Inside-NAT
subnet 10.0.0.0 255.255.255.0
object network ServerIP
host 10.0.0.140
object network WebServices
host 10.0.0.140
access-list incoming-outside extended permit icmp any any echo
access-list incoming-outside extended permit icmp any any echo-reply
access-list incoming-outside extended permit tcp host 1.1.1.1 object ServerIP eq 3389
access-list incoming-outside extended permit tcp host 1.1.1.1 object ServerIP eq 3389
access-list incoming-outside extended permit tcp any object WebServices eq 8081
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
icmp permit any inside
icmp permit any outside
no asdm history enable
arp timeout 14400
!
object network obj_any
nat (inside,outside) dynamic interface
object network Inside-NAT
nat (inside,outside) dynamic interface
object network ServerIP
nat (inside,outside) static interface service tcp 3389 3389
object network WebServices
nat (inside,outside) static interface service tcp 8081 8081
access-group incoming-outside in interface outside
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 0:00:00 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
user-identity default-domain LOCAL
aaa authentication enable console LOCAL
aaa authentication ssh console LOCAL
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
telnet timeout 5
ssh key-exchange group dh-group1-sha1
console timeout 0
vpdn group BTI request dialout pppoe
vpdn group BTI localname intertnet@internet.com.com
vpdn group BTI ppp authentication chap
vpdn username intertnet@internet.com password ***** store-local

dhcpd auto_config outside
!
dhcpd address 10.0.0.50-10.0.0.80 inside
dhcpd enable inside
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
username Logon password TEST privilege 15
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:7fc0aed81a1b5ff013d9aa0599560c7c
: end
[OK]

7 Replies 7

Richard Burts
Hall of Fame
Hall of Fame

Simon

The config suggests that this ASA is a 5505. Is that correct? If so does this ASA have the Base license or the Plus license? My guess is that it is a 5505 with the Base license and a 5505 with the Base license has limitations on configuration of vlans. The 5505 with Base license supports only two full function vlans and can support a third vlan with limited functionality (it can communicate with only one other vlan).

HTH

Rick

HTH

Rick

Hello Rick,

Thanks for replying, I should have said the base license has been upgraded so i has unlimited vlans.

Many thanks,

Simon

Simon

I see that your outside interface is learning its IP address via DHCP. Is there any chance that it is being assigned an IP address that is in 172.16 which would conflict with the subnet that you are using for vlan 3?

Can you post the output of show version? I am not sure whether the 5505 supports the command show switchport, but if it does would you post the output of that command?

HTH

Rick

HTH

Rick

Hi Rick,

The WAN address starts with 82. 

I can't get a show ver right now but I will post tomorrow. I have this config running on many 5505's without any issues.

Many thanks!

Hello,

A show ver as discussed.

Any thoughts anyone?

Thanks!

Simon

This is very odd. Can you identify which command you enter that stops the Internet working? Is it the nameif or one of the earlier commands?

My next suggestion would be to enable logging on this ASA (perhaps logging buffered debug or perhaps logging console if you are using a console connection to this ASA) and then enter the commands again as shown in your original post. Then look in the logs for any message generated when you made your config change. Perhaps there will be a log message that helps explain what is happening.

HTH

Rick

HTH

Rick
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