Two ISP connections - one primary / one guest network

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Highlighted
L3 Networker

Two ISP connections - one primary / one guest network

Hello,

Today we have one interface designated as a WAN interface that manages our IPsec tunnels, GP Portal/Gateway, NAT for Websites, and business web browsing and needs.  We have a second internet connection that we use for a guest network that goes through a really old Sonicwall (Different IP range/provider from our main WAN (untrust) link).  I'm wanting to move the guest network to our PAN and setup a network zone, DHCP and hand off all the traffic to our wireless controller.

I'm seeing a lot of documentation on setting up dual ISPs for redundency, etc. This isn't quite what I am looking for.  I just want to setup another untrust to trust configuration with it's own VR to pass client traffic to and from the internet.  Is that as simple as my configuration needs to be or am I missing something?  Thanks.


Accepted Solutions
Highlighted
L1 Bithead

Hello, you are essentially correct.  There are several ways to do this, but in keeping as close to your proposed solution here is what I would suggest-

Create two new zones, untrust-b and trust-b, create an L3 interface for each zone with an IP address (I would use the Sonicwall's LAN and Sonicwall WAN IP).  Create new virtual router, put both interfaces in that VR, config default gateway in that VR pointing to same Default gateway as sonicwall had) Create security policy to allow inbound and outbound traffic, create NAT rules, configure DHCP on new trust L3 interface.

Move cables from Sonicwall LAN and WAN interfaces to your newly configured PA trust and untrust interfaces, Commit.

two-ISP.bmp

View solution in original post


All Replies
L5 Sessionator

Hi,

If i understand your question correctly. You are trying to move your guest network traffic to PAN.

In order to do that you can create a policy based forwarding and make sure you put in the source address range in the policy.

So only traffic that goes through this link is the guest network.

Here is a document that explains how to configure policy based forwarding

https://live.paloaltonetworks.com/docs/DOC-3220

Hopefully this helps.

Thank you

Numan

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L3 Networker

Not exactly. 

We have our Main WAN link as described above.  This is a service link provided a major internet provider and is a /26 network.The Guest network is a local ISP that is providing a /28.  Currently we have the PAN handling our main WAN link, the /26.  We have a really old Sonicwall that is handling the local ISP of /28. The /28 (guest network) is vlanned and separated from our corporate network and there is no access from either network into the other.

What I am trying to accomplish is to keep these both networks separated but managed on the same firewall.  Traffic from either the corporate LAN or guest network will never merge.

I'm thinking that all I should have to is setup another virtual router, a untrust interface, trust interface, and network zone.

Is this correct?  How can I clarify more?

Highlighted
L1 Bithead

Hello, you are essentially correct.  There are several ways to do this, but in keeping as close to your proposed solution here is what I would suggest-

Create two new zones, untrust-b and trust-b, create an L3 interface for each zone with an IP address (I would use the Sonicwall's LAN and Sonicwall WAN IP).  Create new virtual router, put both interfaces in that VR, config default gateway in that VR pointing to same Default gateway as sonicwall had) Create security policy to allow inbound and outbound traffic, create NAT rules, configure DHCP on new trust L3 interface.

Move cables from Sonicwall LAN and WAN interfaces to your newly configured PA trust and untrust interfaces, Commit.

two-ISP.bmp

View solution in original post

Highlighted
L3 Networker

Wow!  Thank you!  Yes this is exactly what I am trying to accomplish!  Thank you for confirming this.  This is what I had in mind, and thought it was as simple as this but in wanting to confirm, I could not find much information. Thanks!  I'll give it a shot.

Highlighted
L3 Networker

Just out of curious - what are the other ways?

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L1 Bithead

You are welcome.

You have VLANs so you can use sub interfaces rather than using a physical interface, you can do PBF to direct traffic from the guest LAN to their ISP, now with version 5.0.1 you can direct traffic recieved on one interface (ISP) to return traffic to that same ISP, before you could not do that.

If you have the physical interfaces the dual VR route is fine.

Good luck.

Highlighted
L3 Networker

Ah - very cool.  That may be what I need in the next year (network switch upgrade and move to vlans) and for another project here soon at another location.  This is good to know for 5.0.x as I am still working with 4.1.  Thanks again.

Highlighted
L0 Member

Can I do this without virtual system?

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