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Juniper SSG5 multiple public static IP Addresses

Posted on 2012-03-21
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Last Modified: 2012-03-31
I have two sets of IP addresses assigned by my ISP.  For the sake of this question, let's say that they are as follows:

x.x.210.84/30
x.x.41.128/29

I currently have my Juniper SSG5 assigned a static IP address of x.x.210.86/32.

From what I understand, I should have full use of these static IP addresses, if I can figure out how to program the SSG5 to use them:

x.x.210.85
x.x.210.86
x.x.41.129
x.x.41.130
x.x.41.131
x.x.41.132
x.x.41.133
x.x.41.134
x.x.41.135

When I change my SSG5 to an address of x.x.210.84/30 or x.x.210.85/32, I lose my outbound connection.

I've found some off-hand references to using MIP or DIP.  I am using VIP on the one x.x.210.86 address; do I use this, also, once MIP and/or DIP are configured?

Thank you.
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Question by:Lee Tumbleson
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Expert Comment

by:Sanga Collins
ID: 37749992
You will need to create a loop back interface for the new block of ip addresses. Configure the first ip in the new block as the loop back ip. And create an untrust to untrust intra zone policy to permit traffic. You can then use your additional ips as normal.
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Author Comment

by:Lee Tumbleson
ID: 37750105
Thanks for the response.  But, I'm afraid that I need a little more 'hand holding'.

I created the loopback with x.x.41.128/29.  I put this in the same untrust zone that ethernet0/0 is on, which has the x.x.210.86 address.

Now what?  Do I define something in the MIP? DIP? I tried to add x.x.41.129 to the VIP on x.x.210.86, but it generated an error stating that the IP must be in the same subnet as the interface IP.

I'm ultimately trying to direct the IP addresses directly to internal IP addresses.
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Author Comment

by:Lee Tumbleson
ID: 37750120
I see that the loopback also has MIP, DIP and VIP settings.  I tried to redirect port 80, for x.x.41.129 directly to an internal server, but it isn't connecting.
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LVL 18

Expert Comment

by:Sanga Collins
ID: 37750252
after creating a the loopback, did you also create a new policy from untrust to untrust action = permit?

This will allow traffic to reach the loopback interface and vice-versa.
Once that is configured, you should be able to create a MIP to an internal IP. I usually setup my MIP to allow all traffic just for testing, and once i know its working i lock it down to the specific traffic i need
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Accepted Solution

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Lee Tumbleson earned 0 total points
ID: 37754853
I already had an untrust to untrust policy to allow ANY source, ANY destination, ANY service.

"create a MIP to an internal IP"  Is this on the x.x.210.86 (ethernet0/0) or on the loopback?

I set up x.x.41.130 to forward to 192.168.1.4, which has IIS.  I can explore this page, internally at http://192.168.1.4.  I can't get to it at http://x.x.41.130.

What do I select for the 'Host Virtual Router Name' in the MIP?
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Expert Comment

by:Sanga Collins
ID: 37755273
In the the host virtual router is the vr that contains your internal ips. In this case it would be the trust virtual router
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Author Closing Comment

by:Lee Tumbleson
ID: 37790417
Evidently I asked this in the wrong forum.  I'll try going directly to Juniper.
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