DMZ network cannot access Internet

[MarcosP]

Hello!

I'm having troubles configuring a Cisco 515 PIX.

My problem is that DMZ network cannot access Internet. In DMZ side there is only one server.

Here is the config:

PIX Version 6.1(3)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 dmz security50
enable password XXXXXXXXXXXX encrypted
passwd XXXXXXXXXXXXXXX encrypted
hostname pix
domain-name domain.com
fixup protocol ftp 21
fixup protocol http 80
fixup protocol h323 1720
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol sip 5060
fixup protocol skinny 2000
names
access-list outside_in permit icmp any any
access-list outside_in permit tcp any host 80.xxx.xxx.254 eq www
access-list outside_in permit tcp any host 80.xxx.xxx.254 eq 3389
access-list outside_in permit tcp any host 80.xxx.xxx.254 eq 444
access-list outside_in permit tcp any host 80.xxx.xxx.254 eq 443
access-list outside_in permit tcp any host 80.xxx.xxx.254 eq 1723
access-list outside_in permit tcp any host 80.xxx.xxx.254 eq 8100
access-list outside_in permit gre any host 80.xxx.xxx.254
access-list dmz_a_inside permit ip host 192.168.200.254 host 192.168.100.254
access-list pix1apix2_ipsec permit ip 192.168.100.0 255.255.255.0 192.168.50.0 255.255.255.0
access-list pix1apix2_nonat permit ip 192.168.100.0 255.255.255.0 192.168.50.0 255.255.255.0
access-list dmzapix2_ipsec permit ip 192.168.200.0 255.255.255.0 192.168.50.0 255.255.255.0
access-list dmzapix2_nonat permit ip 192.168.200.0 255.255.255.0 192.168.50.0 255.255.255.0
pager lines 24
interface ethernet0 auto
interface ethernet1 auto
interface ethernet2 auto
mtu outside 1500
mtu inside 1500
mtu dmz 1500
ip address outside 80.xxx.xxx.254 255.255.255.192
ip address inside 192.168.100.253 255.255.255.0
ip address dmz 192.168.200.253 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm location 192.168.100.254 255.255.255.255 inside
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list dmzapix2_nonat
nat (inside) 1 192.168.100.0 255.255.255.0 0 0
nat (dmz) 1 192.168.200.0 255.255.255.0 0 0
static (inside,outside) 80.xxx.xxx.254 192.168.100.254 netmask 255.255.255.255 0 0
static (inside,dmz) 192.168.100.0 192.168.100.0 netmask 255.255.255.0 0 0
access-group outside_in in interface outside
access-group dmz_a_inside in interface dmz
route outside 0.0.0.0 0.0.0.0 80.xxx.xxx.1 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
http server enable
http 192.168.100.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
no floodguard enable
sysopt connection permit-ipsec
no sysopt route dnat
crypto ipsec transform-set transmap esp-des esp-md5-hmac
crypto map pix1map 1 ipsec-isakmp
crypto map pix1map 1 match address dmzapix2_ipsec
crypto map pix1map 1 set peer 80.xxx.xxx.191
crypto map pix1map 1 set transform-set transmap
crypto map pix1map interface outside
isakmp enable outside
isakmp key XXXXXXXXXXXX address 80.xxx.xxx.191 netmask 255.255.255.255
isakmp identity address
isakmp policy 1 authentication pre-share
isakmp policy 1 encryption des
isakmp policy 1 hash md5
isakmp policy 1 group 2
isakmp policy 1 lifetime 1800
telnet timeout 5
ssh 80.xxx.xxx.xxx 255.255.255.255 outside
ssh 192.168.100.0 255.255.255.0 inside
ssh timeout 5
terminal width 80

Can someone tell me what's wrong with it?

Thanks in advance!

 

[SynAckAck]

Looks like you need a static for your dmz interface to the outside.

try this
static (dmz,outside) 192.168.200.0 netmask 255.255.255.0 0 0

 

[SynAckAck]

Sorry the static should be

static (dmz,outside) 192.168.200.0 80.x.x.x netmask 255.255.255.0 0 0

Or, you could just static the one host you have in the dmz, depends what your range is on the outside.

 

[Supergrrover]

The ACL that you have applied to the dmz interface is blocking all traffic except what you have specified.
access-list dmz_a_inside permit ip host 192.168.200.254 host 192.168.100.254
There is an implicit "deny ip any any" at the end.

Add these two lines to that access list
access-list dmz_a_inside deny ip 192.168.200.0 255.255.255.0 192.168.100.0 255.255.255.0
access-list dmz_a_inside permit ip any any

The first line blocks all other traffic from the dmz to the internal network and the second line allows all other traffic outbound. The ACL is processed from the top down.

I would also change the dmz static to
static (inside,dmz) 192.168.100.254 192.168.100.254 netmask 255.255.255.255 0 0
This only translates traffic between the .254 addresses and not the whole block.





Brent
Systems Engineer / Consultant
CCNP, CCSP