Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Firewalls Community

Cisco Employee

Re: Zone based Firewall --DMZ

will it be possible for you to attach the config, so that we can look at the whole config

to isolate the issue further you can disable firewall on wan and dmz for a min by removing the zone security command and try to get to internet from dmz hosts, but be careful as you will end up disturbing traffic from lan to wan

so wht u can do is for a min you can remove zone security commands from all interfaces and test dmz-wan connectivity

i understand tihs might not be possible, so if its ok with you could you please attach the config so that we can take a look at everything


Re: Zone based Firewall --DMZ


Config is attached to my orignal post, in a zip file.

I can not pull the firewall off, its a PROD enviroment. Anything else I can try?

Cisco Employee

Re: Zone based Firewall --DMZ

you do not have ip nat inside on vlan 90

and also include this network in 101 acl

View solution in original post


Re: Zone based Firewall --DMZ

As soon as I added the ip nat inside and updated ACL 101 it worked!

Its always the simple things, its a learning experience after all.

Thanks everyone.

Rising star

Re: Zone based Firewall --DMZ


Glad its solved, Just a quick answer to your previous example:

You wrote:

Thanks Mohamed,

I think this is right?

zone-pair security WAN-DMZ source WAN destination DMZ
service-policy type inspect WAN-to-DMZ-policy
zone-pair security DMZ-WAN source DMZ destination WAN
service-policy type inspect WAN-to-DMZ-policy
policy-map type inspect WAN-to-DMZ-policy
class type inspect DMZ-class
class class-default
class-map type inspect match-any DMZ-class
match access-group 130
access-list 130 remark DMZ access all
access-list 130 permit ip any any

If thats right... Then i must have something else wrong as my machine in the DMZ still cna't access any services on the internet.
Quick question, the default gateway on machines on the Vlan90 should be (fe/6) or should it be (fe/1)?

If you set the pass action on the policy map , then you have to create another pair and policy that permits the return traffic from DMZ to WAN. otherwise, my example should solve your problem if you need WAN Access to DMZ which will inspect the traffic and will permit the return traffic as its stateful.




Re: Zone based Firewall --DMZ


I did change it to inspect. So I should only need WAN-to-DMZ policy and not a DMZ-to-WAN ?

I am still getting my head around inspect and pass ect..
For now I will leave this as is, I'll do some more reading.

Thanks for all your help!

CreatePlease to create content
Content for Community-Ad
FusionCharts will render here