Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

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

Posted on 2011-09-30
9
Medium Priority
?
1,080 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
Choose an Exciting Career in Cybersecurity

Help prevent cyber-threats and provide solutions to safeguard our global digital economy. Earn your MS in Cybersecurity. WGU’s MSCSIA degree program was designed in collaboration with national intelligence organizations and IT industry leaders.

 

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 2000 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

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

For months I had no idea how to 'discover' the IP address of the other end of a link (without asking someone who knows), and it drove me batty. Think about it. You can't use Cisco Discovery Protocol (CDP) because it's not implemented on the ASAs.…
There’s a movement in Information Technology (IT), and while it’s hard to define, it is gaining momentum. Some call it “stream-lined IT;” others call it “thin-model IT.”
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 …
Both in life and business – not all partnerships are created equal. Spend 30 short minutes with us to learn:   • Key questions to ask when considering a partnership to accelerate your business into the cloud • Pitfalls and mistakes other partners…

926 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