Question

ASA Connectivity Issues

Asked by: bbresslin

Here is the scenario.  I have an ASA 5505 with Security Plus license.  I currently have

Inside (100) 192.168.10.0/24
DMZ1 (75) 192.168.12.0/24
DMZ2 (50) 192.168.11.0/24

From my machine on the 192.168.10.0/24 subnet, I can reach the internet, and devices on the DMZ1 network.  However I cannot reach any devices on the DMZ2 network? I have the access-list in place, as well as the nat statements (they match exaclty to the statments for the DMZ1 connectivity, which I can reach)

I have ran a packet capture between inside and DMZ2, (for ping) I see the echo request go through my interface and out the dmz interface, however I do not see any echo reply?  Could this be a potential licensing issue?  I thought I was ok with security plus?

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Asked On
2009-11-06 at 12:46:54ID24879261
Topic

Networking Hardware Firewalls

Participating Experts
2
Points
500
Comments
8

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Answers

 

by: jodylemoinePosted on 2009-11-06 at 13:28:25ID: 25763220

That configuration looks reasonable.  Do you have any inbound access lists on your DMZ2 interface?

 

by: bbresslinPosted on 2009-11-06 at 13:38:31ID: 25763297

There are inbound access list, however I ran a packet trace as well, and it stated the packet was allowed?

 

by: jodylemoinePosted on 2009-11-06 at 13:39:48ID: 25763307

Was the return packet allowed?

 

by: bbresslinPosted on 2009-11-06 at 13:42:23ID: 25763326

Yes, The strange thing is when I initiate a ping from a device on DMZ2 back to my machine on the inside network, I get a reply, its I can't initiate any traffic from inside (100) to DMZ2 (50)

 

by: jodylemoinePosted on 2009-11-06 at 13:44:11ID: 25763340

Do you get the same problem if you remove the access lists from the DMZ2 interface?

 

by: bbresslinPosted on 2009-11-06 at 13:54:11ID: 25763411

Yes.  I want to say its an issue with the PC on the other subnet, but I am able to ping it from the firewall (which makes sense since it is directy connected) It's really bizare I can reach the DMZ1, but DMZ2 is not reachable?

 

by: rochey2009Posted on 2009-11-06 at 14:38:48ID: 25763702

Hi,

Do you have statics defined to bypass NAT?

 

by: jodylemoinePosted on 2009-11-06 at 19:46:46ID: 25764892

Okay, let's strip it back completely.  If you remove your inbound access lists from both your inside and DMZ2 interfaces, does the problem persist?  Also, rochey2009 has a point in that your "nat 0" statements should cover traffic between the three interfaces.

20120131-EE-VQP-002

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