Solved

PIX 501 Firewall Configuration

Posted on 2006-06-15
11
396 Views
Last Modified: 2013-11-16
Currently I have a 501 protecting out corporate LAN from the outside.  I also have another 501 that segments our corporate LAN from another subnet that is not connected to the Internet.

I would like to be able to gain access to that second PIX from the outside so that I can access the computers on that network.

Currently that 2nd PIX is setup with a VPN group that allows PC's from our corporate LAN to securely access data on the other LAN.  That PIX has an IP address assigned to it that is part of the subnet of our corporate LAN.  This works great.

Would it be possible for assign a public IP address to the internal IP address of the 2nd PIX on the first PIX?  I was thinking that if there was a public address pointing to the IP address of the 2nd PIX, I could then authenticate to the VPN group in the 2nd PIX.

First, is this at all possible?  I am getting told by the vendor that set up this 2nd firewall and network that it is, but they are not willing to assist.  Just wondering if there is an easier way or if I am just wasting my time.

Thanks,
Matthew
0
Comment
Question by:spectraflame
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
  • 2
  • +1
11 Comments
 
LVL 9

Expert Comment

by:stressedout2004
ID: 16914316
Is your setup something like this? (IP addressing is just for illustration.)

 ----------corporate LAN----------(192.168.1.1)-corporate PIX 501-(1.1.1.1)----------------internet---
                                           |
                                           | (192.168.1.2)
                                        2nd PIX
                                           |
                                           | (192.168.2.0/24)
                                        2nd PIX LAN


If you have the above setup, then yes it is possible. All you have to do is create a static NAT on the corporate PIX and add an access-rule and apply it on the outside interface of the Corporate PIX.

e.g.

static (inside, outside) 1.1.1.2 192.168.1.2 netmask 255.255.255.255
access-list acl_out permit esp any host 1.1.1.2
access-list acl_out permit udp any host 1.1.1.2 eq 500
access-list acl_out permit udp any host 1.1.1.2 eq 4500
access-group acl_out in interface outside





0
 
LVL 5

Expert Comment

by:renill
ID: 16919285


-------------------  Pix1 ----------------------- Internet
                             |
                             |
                             |
                         Pix2
                            |
                            |
-----Corp Lan------------Internal LAN


  is this the conf iguration you are having??
0
 

Author Comment

by:spectraflame
ID: 16922896
Our configuration is like this:

Internet ---------------------------------- Pix 1 (9.9.9.9 - Outside (Public) Address)) - 172.16.11.XXX (Internal Address)
                                                                     |
                                                                     |
                                                                     |
                                                        Corporate LAN (172.16.11.XXX)
                                                                     |
                                                                     |
                                                                     |
                                                         Pix 2 (Corporate address of 172.16.11.XXX) External
                                                                 (Internal address for the LAN of 172.16.12.XXX)
                                                                     |
                                                                     |
                                                                     |
                                                         Internal LAN (172.16.12.XXX)

I hope this is easy to understand.  Routing and firewalls are still new to me.

What I have so far I have been able to do using the PDM.  This is what I have so far.

static (inside,outside) EXTERNAL_PUBLIC_IP INTERNAL_ADDRESS_OF_2ND_PIX netmask 255.255.255.255 0 0

The way I read the statements from stressedout2004 is that I need to create a new access group to allow this to function properly.  My question is how can I do this with the PDM?  I am not very comfortable with the command line programming.

Thanks for your help thus far,
Matthew
0
How our DevOps Teams Maximize Uptime

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us. Read the use case whitepaper.

 
LVL 11

Accepted Solution

by:
prueconsulting earned 63 total points
ID: 16929781
No new access group required. Add the acl to allow access from the outside to the inside to yuor existing outside access-list entries.. Be sure to make sure that it doesnt get put in place after the deny statement
0
 

Author Comment

by:spectraflame
ID: 16934667
Should I add a 2nd access list if I currently have one already configured?  Should I just use its name in place of the acl_out?

Matthew
0
 
LVL 9

Expert Comment

by:stressedout2004
ID: 16934704
Yes.
0
 
LVL 11

Expert Comment

by:prueconsulting
ID: 16934733
Yes simply use its name in place of acl_out because you can not have 2 access lists applied to a single interface
0
 

Author Comment

by:spectraflame
ID: 16935673
So once these statements are applied, would I have to configure anything on the 2nd PIX?  I currently have a VPN group on that PIX but it is setup specifically that the outside interface is coming from out internal LAN.

Also if there is no other changes necessary, would I be passing through the first PIX and authenicating to the 2nd with the VPN client?

0
 
LVL 9

Assisted Solution

by:stressedout2004
stressedout2004 earned 62 total points
ID: 16947126
There's no changes that needs to be done on the 2nd PIX. You can use the same vpngroup you have. The first PIX is just pretty much a pass through , the clients will be connecting and authenticating with the 2nd PIX, not the first.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

To setup a SonicWALL for policy based routing to be used with the Websense Content Gateway there are several steps that need to be completed. Below is a rough guide for accomplishing this. One thing of note is this guide is intended to assist in the…
Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
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…

752 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