Solved

How to configure asa 5505 to support multiple internal network segments?

Posted on 2011-09-30
9
1,061 Views
Last Modified: 2012-05-12
This is a newly bought Cisco ASA 5505 firewall. This is using ASA Version 8.4(2). Due to licensing, I found that it only allow to create 2 nameif - inside and outside, and Ip addresses not able to assigned to the physical ethernet interfaces. My network has 2 internal network segments - 10.0.1.x/24 and 10.0.2.0/24, and of course 1 external port to connect to router.

So, I configured vlan 2 interface with nameif outside, and assigned ethernet 0/0 to it. I configured vlan 1 interface with nameif inside, and assigned ethernet 0/1 and 0/2 to it. but, then how can I support both internal network segments on INSIDE?

thanks in advance.
0
Comment
Question by:MezzutOzil
  • 4
  • 4
9 Comments
 
LVL 35

Expert Comment

by:Ernie Beek
ID: 36890641
Well, using a base license you can have a third interface/vlan. This is limited though, it can only communicate with one other vlan. But if you don't need the two networks to communicate with each other you could still use the third vlan for internet access.
0
 

Author Comment

by:MezzutOzil
ID: 36890680
Hi einiebeek,

Can you show me the configurations?
0
 
LVL 20

Expert Comment

by:RPPreacher
ID: 36890695
Or super net 10.0.1.0/24 and 10.0.2.0/24 on the ASA and use 10.0.0.0/22 on the inside interface of the ASA
0
Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

 

Author Comment

by:MezzutOzil
ID: 36890709
Hi RPPreacher,

How about the default gateway for segment 1.0/24 and 2.0/24?
0
 
LVL 35

Expert Comment

by:Ernie Beek
ID: 36890710
@RPPreacher: thought of that, but what are you going to use as default gateway(s) on both the networks?

@MezzutOzil: see if this works:
interface Vlan 1
nameif inside
security-level 100
ip address 10.0.1.254 255.255.255.0
interface Vlan 2
nameif inside2
security-level 100
ip address 10.0.2.254 255.255.255.0
interface Vlan 3
nameif outside
security-level 0
ip address x.x.x.x 255.255.255.x
object network obj_any
subnet 0.0.0.0 0.0.0.0
nat (inside,outside) dynamic interface
0
 

Author Comment

by:MezzutOzil
ID: 36890732
Hi erniebeek,

I think the licensing only allow up to 2 nameif. When I wanted to create the 3rd nameif on new vlan, the following error prompted:

  This license does not allow configuratng more than 2 interfaces with nameif and without a "no forward" command on this interface or on 1 interface with nameif already configured.
 
0
 
LVL 35

Accepted Solution

by:
Ernie Beek earned 500 total points
ID: 36890914
Ok, minor adjustement:

interface Vlan 1
nameif inside
security-level 100
ip address 10.0.1.254 255.255.255.0
interface Vlan 2
no forward interface vlan 1
nameif inside2
security-level 100
ip address 10.0.2.254 255.255.255.0
interface Vlan 3
nameif outside
security-level 0
ip address x.x.x.x 255.255.255.x
object network obj_any
subnet 0.0.0.0 0.0.0.0
nat (inside,outside) dynamic interface
0
 

Author Closing Comment

by:MezzutOzil
ID: 36904579
Excellence, it works
0
 
LVL 35

Expert Comment

by:Ernie Beek
ID: 36904912
Good!
Glad I could help and Thx for the points :)
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There are many useful and sometimes not well documented or forgotten IOS or ASA/PIX commands. See IPE article here , there was also one on PacketU and on Cisco Tips & Tricks. Below are my favorites. I give also a few most often used for Cisco IPS an…
Concerto Cloud Services, a provider of fully managed private, public and hybrid cloud solutions, announced today it was named to the 20 Coolest Cloud Infrastructure Vendors Of The 2017 Cloud  (http://www.concertocloud.com/about/in-the-news/2017/02/0…
Both in life and business – not all partnerships are created equal. As the demand for cloud services increases, so do the number of self-proclaimed cloud partners. Asking the right questions up front in the partnership, will enable both parties …
As a trusted technology advisor to your customers you are likely getting the daily question of, ‘should I put this in the cloud?’ As customer demands for cloud services increases, companies will see a shift from traditional buying patterns to new…

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question