Configure Prisma Access for Networks—Allocating Bandwidth by Location

Select
Panorama
Cloud Services
Configuration
Remote Networks
and edit the settings by clicking the gear icon in the
Settings
area.
In the Templates section,

Add

any templates that contain configuration you want to push to Prisma Access for networks. For example, if you have existing templates that contain your zone configurations, or IPSec tunnel, IKE Gateway, or crypto profile settings, you can add them to the predefined Remote_Network_Template_Stack to simplify the onboarding process.

You can

Add

more than one template to the stack and then order them appropriately using

Move Up

and

Move Down

. This is important because Panorama evaluates in the stack from top to bottom, with settings in templates higher in the stack taking priority over the same settings specified in templates lower in the stack. Note that you cannot move the default template from the top of the stack.

Although you can add existing templates to the stack from the plugin, you cannot create a new template from the plugin. Instead, use the workflow to add a new template.

Select the

Parent Device Group

for Prisma Access for remote networks. You can select an existing device group or use

Shared

.

You will push all of the configuration—including the security policy, security profiles, and other policy objects (such as application groups and objects, and address groups), HIP objects and profiles and authentication policy—that Prisma Access for networks needs to enforce consistent policy to your remote network users using the device group hierarchy you specify here.

You don’t need to define all of the policy that you will push to the remote network yet. Instead, configure the settings to onboard the remote site. You can then go back and add the templates and device groups with the complete configurations to push consistent policy out to your remote networks.

(

Optional

) If you have configured an on-premises next-generation firewall as a master device, select the

Master Device

you configured.

When you select the

Master Device

, Prisma Access auto-populates user and group information in the security policy rules in Panorama for mobile user and remote network device groups.

If you will be configuring remote networks that have overlapping subnets, select the

Overlapped Subnets

check box to enable outbound internet access for those locations.

While configuring Remote Network Locations with Overlapping Subnets introduces some limitations, it is acceptable in some cases (for example, if you want to add a guest network at a retail store location).


(
Optional
) Configure
DNS Proxy
settings for your remote network.
Prisma Access allows you to specify DNS servers to resolve both domains that are internal to your organization and external domains. If you do not specify any settings, Prisma Access does not proxy DNS requests for remote networks.
In the

Remote_Network_Device_Group

device group, select

Policies

Security

and

Add

a security policy rule with an

Application

of

DNS

and an

Action

of

Allow

to allow DNS traffic.

Without a security policy rule to allow DNS traffic, DNS resolution does not occur.



If you configure Prisma Access to proxy the DNS requests from your remote networks, update the DNS settings on all the endpoints in that network to use the Prisma Access

Remote Network DNS Proxy IP Address

as the primary DNS server and use your DNS server as secondary DNS server. You can get this DNS proxy IP from

Panorama

Cloud Services

Status

Network Details

Service Infrastructure

.



Add

one or more DNS proxy settings, entering the following values:

For
Internal Domains
:
Select a
Region
(
North America & South America
,
Africa, Europe & Middle East
, or
Asia, Australia & Japan
), or specify
Worldwide
to apply the DNS settings globally.
You can add multiple region-specific DNS proxy settings, or specify a DNS proxy for one or more regions and specify another worldwide DNS proxy for the rest of the world. If you specify only a regional setting and onboard remote networks in that region only, Prisma Access does not proxy the DNS requests, and the source IP address of the DNS request is the remote network’s
EBGP Router
IP address. If you specify multiple proxy settings with a mix of regional and worldwide regions, Prisma Access uses the regional settings for the Locations in the region you specify; otherwise, Prisma Access uses the worldwide settings.
Specify the IP addresses of the
Primary DNS
and
Secondary DNS
servers that your remote network should use to resolve internal domains.
(
Optional
) If you want your internal DNS server to only resolve the domains you specify, enter the domains to resolve in the
Domain List
.
You can use a wildcard (*) in front of the domains in the domain list, for example *.acme.local or .acme.com. You can specify a maximum of 1,024 domain entries.
For
External Domains
:
Enter a
Primary DNS
choice.
To use the default Prisma Access DNS server, select
Use Cloud Default
. To use the same server that you use to resolve internal domains, select
Same as Internal Domains
. To use third-party or public DNS server, select
Custom DNS Server
, then specify the IP address of the DNS server.
Enter a
Secondary DNS
choice, choosing from the same options you chose for the
Prisma DNS
.


(
Optional
) Configure Prisma Access to use the Directory Sync component of the Cloud Identity Engine to retrieve user and group information using Group Mapping Settings.
You must configure the Cloud Identity Engine to retrieve user and group information from your Active Directory (AD) before you enable group mapping in Prisma Access using
Group Mapping Settings
.
Create new zones in the one of the templates in the stack (
Network > Zones> Add
) or map the zones referenced in existing templates you added to the stack as trusted or untrusted. On Panorama, policy rules are defined in device groups, and zones are defined in templates. Therefore, you need to make sure that you add the templates that reference the zones included in your policy rules to the template stack.
On a Palo Alto Networks® next-generation firewall, security policy is enforced between zones, which map to physical or virtual interfaces on the firewall. But as Prisma Access for networks has only two zones, trust and untrust, you need to map any zone with traffic bound to the Internet (including your sanctioned SaaS applications) as untrust and all internal zones as trust.
(Optional) Edit the zone mapping settings.
By default, all of the zones in Prisma Access for networks template stack a are classified as Untrusted Zones. If you have not yet defined zones or if the templates in the Remote_Network_Template_Stack do not have zone configurations, you can come back and add them when you push policy to Prisma Access for networks.
For each zone you want to designate as trusted, select it and click
Add
to move it to the list of
Trusted Zones
.
Click
OK
to save the mappings.
Click
Add
in the Onboarding settings, and specify a
Name
to identify the infrastructure that will secure the remote network location you are onboarding.
You cannot change the name of the remote network location after you enter it. Make sure you know your naming scheme for your remote networks before you begin onboarding.
(
BGP deployments only
) Create a configuration so that your remote network connection can use up to four IPSec tunnels for its traffic (
ECMP Load Balancing
).
QoS is not supported with ECMP load balancing, and static routes are not supported (BGP is required). If your deployment uses one IPSec tunnel for its remote network connection or uses static routes, select
None
for
ECMP Load Balancing
and continue to Step 9.
Specify a minimum
Bandwidth
of
50 Mbps
.
Prisma Access divides the bandwidth you select by the number of tunnels; for example, if you specify 300 Mbps and add four tunnels, each tunnel carries 75 Mbps. If one of the tunnels goes down, your network connection will now carry 225 Mbps instead of 300 Mbps.
Select one of the choices to enable or disable ECMP load balancing.

None
—Do not use ECMP load balancing (use a single remote network tunnel for this remote network connection). This is the only choice you can make for static routes; BGP is required for ECMP load balancing.
Enabled with Symmetric Return
—Specify up to four IPSec tunnels for this remote network connection and force Prisma Access to use the same link for the return traffic as it used to send the traffic.
Select this option if you use one or more tunnels as a backup tunnel to be used only if one of the primary tunnels go down. If a link fails, Prisma Access uses one of the other tunnels to send and receive traffic symmetrically.



Add

an IPSec tunnel for the remote network connection and specify the following values:

Enable
—Enables BGP for the IPSec tunnel.
This selection is not configurable; you must enable BGP to configure ECMP.
Summarize Mobile User Routes before advertising
—Reduces the number of mobile user IP subnet advertisements over BGP to your customer premises equipment (CPE) by summarizing them.
By default, Prisma Access advertises the mobile users IP address pools in blocks of /24 subnets; if you summarize them, Prisma Access advertises the pool based on the subnet you specified. For example, Prisma Access advertises a public user mobile IP pool of 10.8.0.0/20 using the /20 subnet, rather than dividing the pool into subnets of 10.8.1.0/24, 10.8.2.0/24, 10.8.3.0/24, and so on before advertising them. Summarizing these advertisements can reduce the number of routes stored in CPE routing tables. For example, you can use IP pool summarization with cloud VPN gateways (Virtual Private Gateways (VGWs) or Transit Gateways (TGWs)) that can accept a limited number of routes.
If you enable route summarization for a location that uses ECMP, you must enable route summarization on all links to that location, or you will receive an error during commit.
Prisma Access sets the community string for aggregated mobile user routes to
0xFFFE:0xFFF0
.
Advertise Default Route
—Allows Prisma Access to advertise a default route for the remote network using eBGP.
You must publish your default routes before you make this selection to advertise them. In addition, be sure that your network does not have another default route being advertised by BGP, or you could introduce routing issues in your network.
Don’t Advertise Prisma Access Routes
—Prevents the Prisma Access BGP peer from forwarding routes into your organization’s network.
By default, Prisma Access advertises all BGP routing information, including local routes and all prefixes it receives from other service connections, remote networks, and mobile user subnets. Select this check box to prevent Prisma Access from sending any BGP advertisements, but still use the BGP information it receives to learn routes from other BGP neighbors.
Since Prisma Access does not send BGP advertisements if you select this option, you must configure static routes on the on-premises equipment to establish routes back to Prisma Access.

Peer AS
—Specify the autonomous system (AS) to which the firewall, virtual router, or BGP router at your remote network belongs.
Peer IP Address
—Enter the IP address assigned as the Router ID of the eBGP router on the remote network for which you are configuring this connection.
Local IP Address
(
Optional
)—Enter an address that Prisma Access uses as its Local IP address for BGP.Specify the IP address to use on the Prisma Access side of the tunnel.
Specifying a
Local Address
is useful where the device on the other side of the connection (such as an Amazon Web Service (AWS) Virtual Private Gateway) requires a specific local IP address for BGP peering to be successful. Make sure that the address you specify does not conflict or overlap with IP addresses in the Infrastructure Subnet or subnets in the remote network.
Secret
and
Confirm Secret
(
Optional
)—Enter and confirm a passphrase to authenticate BGP peer communications.

Repeat the previous step to add up to four tunnels to use with the remote network connection.


Select the
Location
in which Prisma Access will deploy the infrastructure required to secure your remote network location. This region should be geographically located close to your remote network location.
Select the
Bandwidth
you want to allocate to this remote network location. The bandwidth you select cannot exceed the total amount of bandwidth you have licensed. Use this setting to define the amount of the total licensed bandwidth you want to allocate to this location.
To help you determine how much bandwidth a specific site needs, consider the bandwidth available from your ISP at each location. If you enable
ECMP Load Balancing
, you must specify a minimum of 50 Mbps.
You can change the bandwidth of a remote network connection after you onboard it, with the exception of the
500 Mbps (w/o SSL Decryption)
or
1000 Mbps (Preview)
bandwidth choices. If you select either of these preview choices and then need to change the bandwidth, you must first add an identical network with the only change being the lower, non-Preview bandwidth choice, commit your changes, make a note of the
Service IP address
and reconfigure your IPSec tunnel to use that address, then delete the existing remote network with the preview bandwidth choice.
(
Static routing or single-tunnel deployments only
) Select or add a new
IPSec Tunnel
configuration to access the firewall, router, or SD-WAN device at the corporate location:
If you have added a template to the Remote_Network_Template_Stack (or modified the predefined Remote_Network_Template) that includes an IPSec Tunnel configuration, select that
IPSec Tunnel
from the drop-down. Note that the tunnel you are creating for each remote network connection connects Prisma Access to the IPSec-capable device at each branch location.
Use the following guidelines when configuring an IPSec tunnel:
The peer addresses in the IKE Gateway configuration must be unique for each tunnel. You can, however, re-use some of the other common configuration elements, such as crypto profiles.
The IPSec Tunnel you select from a template must use Auto Key exchange and IPv4 only.
If you onboard multiple remote networks to the same location with dynamic IKE peers, you must use the same IKE crypto profile for all remote network configurations.
To create a new IPSec Tunnel configuration, click
New IPSec Tunnel
, give it a
Name
and configure the IKE gateway, IPSec crypto profile, and tunnel monitoring settings.
If the IPSec-capable device at your branch location uses policy-based VPN, on the
Proxy IDs
tab,
Add
a proxy ID that matches the settings configured on your local IPSec device to ensure that Prisma Access can successfully establish an IPSec tunnel with your local device.
Leave
Enable Replay Protection
selected to detect and neutralize against replay attacks.
Select
Copy TOS Header
to copy the Type of Service (TOS) header from the inner IP header to the outer IP header of the encapsulated packets in order to preserve the original TOS information.
To enable tunnel monitoring for the service connection, select
Tunnel Monitor
.
Enter a
Destination IP
address.
Specify an IP address at your branch location to which Prisma Access can send ICMP ping requests for IPSec tunnel monitoring. Make sure that this address is reachable by ICMP from the entire Prisma Access infrastructure subnet.  
If you use tunnel monitoring with a peer device that uses multiple proxy IDs, specify a
Proxy ID
or add a
New Proxy ID
that allows access from the infrastructure subnet to your branch location.
The following figure shows a proxy ID with the service infrastructure subnet (172.16.55.0/24 in this example) as the
Local
IP subnet and the branch location’s subnet (10.1.1.0/24 in this example) as the
Remote
subnet.

The following figure shows the Proxy ID you created being applied to the tunnel monitor configuration by specifying it in the
Proxy ID
field.

You must configure a static route on your CPE to the Tunnel Monitor IP Address for tunnel monitoring to function. To find the destination IP address to use for tunnel monitoring from your branch location to Prisma Access, select
Panorama
Cloud Services
Status
Network Details
, click the
Service Infrastructure
radio button, and find the
Tunnel Monitor IP Address
.
If you have a secondary WAN link at this location, select
Enable Secondary WAN
.
Be sure to create a unique IPSec tunnel for each remote network’s secondary WAN; Prisma Access does not support reusing the same IPSec tunnel for secondary WANs in multiple remote networks.
If you use static routes, tunnel failover time is less than 15 seconds from the time of detection, depending on your WAN provider.
If you configure BGP routing and have enabled tunnel monitoring, the shortest default hold time to determine that a security parameter index (SPI) is failing is the tunnel monitor, which removes all routes to a peer when it detects a tunnel failure for 15 consecutive seconds. In this way, the tunnel monitor determines the behavior of the BGP routes. If you do not configure tunnel monitoring, the hold timer determines the amount of time that the tunnel is down before removing the route. Prisma Access uses the default BGP HoldTime value of 90 seconds as defined by RFC 4271, which is the maximum wait time before Prisma Access removes a route for an inactive SPI. If the peer BGP device has a shorter configured hold time, the BGP hold timer uses the lower value.
When the secondary tunnel is successfully installed, the secondary route takes precedence until the primary tunnel comes back up. If the primary and secondary are both up, the primary route takes priority.
If you use a different BGP peer for the secondary (backup) connection, Prisma Access does not honor the Multi-Exit Discriminator (MED) attributes advertised by the CPE. This caveat applies if you use multiple BGP peers on either remote network connections or service connections.
Enable routing to the subnetworks or individual IP addresses at the remote network site that your users will need access to.
Prisma Access uses this information to route requests to the appropriate site. The networks at each site cannot overlap with each other or with IP address pools that you designated for the service infrastructure or for the Prisma Access for users IP pools. You can configure
Static Routes
,
BGP
, or a combination of both.
To configure

Static Routes

:

On the
Static Routes
tab, click
Add
and enter the subnetwork address (for example, 172.168.10.0/24) or individual IP address of a resource, such as a DNS server (for example, 10.32.5.1/32) that your remote users will need access to.
Repeat for all subnets or IP addresses that Prisma Access will need access to at this location.



To configure

BGP

:

Select the

BGP

tab.

Select the

ECMP Load Balancing

choices. See Step 6.

If you select

None

for

ECMP Load Balancing

, enter the BGP choices.



To enable BGP for the remote network connection, select

Enable

.

When you enable BGP, Prisma Access sets the time to live (TTL) value for external BGP (eBGP) to 8 to accommodate any extra hops that might occur between the Prisma Access infrastructure and your customer premises equipment (CPE) that terminates the eBGP connection.

To reduce the number of mobile user IP subnet advertisements over BGP to your customer premises equipment (CPE) by summarizing them, select

Summarize Mobile User Routes before advertising

.

By default, Prisma Access advertises the mobile users IP address pools in blocks of /24 subnets; if you summarize them, Prisma Access advertises the pool based on the subnet you specified. For example, Prisma Access advertises a public user mobile IP pool of 10.8.0.0/20 using the /20 subnet, rather than dividing the pool into subnets of 10.8.1.0/24, 10.8.2.0/24, 10.8.3.0/24, and so on before advertising them. Summarizing these advertisements can reduce the number of routes stored in CPE routing tables. For example, you can use IP pool summarization with cloud VPN gateways (Virtual Private Gateways (VGWs) or Transit Gateways (TGWs)) that can accept a limited number of routes.

Prisma Access sets the community string for aggregated mobile user routes to

0xFFFE:0xFFF0

.

To allow Prisma Access to advertise a default route for the remote network using eBGP, select

Advertise Default Route

.

If you select

Advertise Default Route

, be sure that your network does not have another default route being advertised by BGP, or you could introduce routing issues in your network.

You must publish your default routes before you make this selection to advertise them. In addition, be sure that your network does not have another default route being advertised by BGP, or you could introduce routing issues in your network.

To prevent the BGP peer on the Prisma Access firewall from forwarding routes into your organization’s network, select

Don’t Advertise Prisma Access Routes

.

By default, Prisma Access advertises all BGP routing information, including local routes and all prefixes it receives from other service connections, remote networks, and mobile user subnets. Select this check box to prevent Prisma Access from sending any BGP advertisements, but still use the BGP information it receives to learn routes from other BGP neighbors.

Since Prisma Access does not send BGP advertisements if you select this option, you must configure static routes on the on-premises equipment to establish routes back to Prisma Access.

Enter the

Peer AS

, which is the autonomous system (AS) to which the firewall, virtual router, or BGP router at your remote network belongs.

Enter the IP address assigned as the Router ID of the eBGP router on the remote network for which you are configuring this connection as the

Peer Address

.

(

Optional

) Enter an address that Prisma Access uses as its Local IP address for BGP.

Specifying a

Local Address

is useful where the device on the other side of the connection (such as an Amazon Web Service (AWS) Virtual Private Gateway) requires a specific local IP address for BGP peering to be successful. Make sure that the address you specify does not conflict or overlap with IP addresses in the Infrastructure Subnet or subnets in the remote network.

You must configure a static route on your CPE to the BGP

Local Address

.

(

Optional

) Enter and confirm a passphrase to authenticate BGP peer communications.

(

Optional

) If you configured a

Secondary WAN

and you need to change the

Peer Address

or

Local Address

for the secondary (backup) BGP peer, deselect

Same as Primary WAN

and enter a unique Peer and, optionally, Local IP address for the secondary WAN.

In some deployments (for example, when using BGP to peer with an AWS VPN gateway), the BGP peer for the primary and secondary WAN might be different. In those scenarios, you can choose to set a different BGP peer for the secondary WAN.

For BGP deployments with secondary WANs, Prisma Access sets both the primary and secondary tunnels in an

UP

state, but follows normal BGP active-backup behavior for network traffic. Prisma Access sets the primary tunnel as active and sends and receives traffic through that tunnel only; if the primary tunnel fails, Prisma Access detects the failure using BGP rules, sets the secondary tunnel as active, and uses only the secondary tunnel to send and receive traffic.


If required, enable
Quality of Service
for the remote network connection and specify a QoS profile or add a
New QoS Profile
.
You can create QoS profiles to shape QoS traffic for remote network and service connections and apply those profiles to traffic that you marked with PAN-OS security policies, traffic that you marked with an on-premises device, or both PAN-OS-marked and on-premise-marked traffic.

(
Optional
) Configure
Inbound Access
options.
This choice only applies if you want to configure your remote network for remote network inbound access.
Commit the configuration changes to Panorama and push the configuration out to Prisma Access for networks.
Click
Commit
Commit to Panorama
.
Click
Commit
Commit and Push
. Click
Edit Selections
Prisma Access
, and select both Prisma Access for networks and Prisma Access for service setup to push the configuration out to the service.

Click
OK
and
Push
.
Configure the IPSec-capable device at the remote network location to set up an IPSec connection with Prisma Access for networks.
Find the
Service IP Address
for this remote network connection by selecting
Panorama
Cloud Services
Status
Network Details
, clicking the
Remote Networks
radio button, and viewing the
Service IP Address
field. Prisma Access for networks infrastructure has assigned this IP address for the Prisma Access remote network connection, and you must configure this as the peer IP address to set up the IPSec tunnel between the remote network location and Prisma Access for networks.

Check the
Local IP address
for the device at the remote network location on the
Panorama
Cloud Services
Status
Network Details
Remote Networks
page. If you are performing NAT at the remote network location, the
Local IP address
displays the IP address of the device after NAT.
To secure traffic at the remote network location you must create security policy rules.
Select
Policies
.
Select the
Device Group
in which to add policy rules. You can select the Remote_Network_Device_Group or the parent device group that you selected for defining policies to secure the remote network location.
Create security policy rules. Make sure that you do not define security policy rules to allow traffic from any zone to any zone. In the security policy rules, use the zones that you defined in your template.
If a user on your network is denied access to a website, report website access issues before you open a ticket with Palo Alto Networks.
Enable logging to Cortex Data Lake. You must create and attach a log forwarding profile to each policy rule for which you want to forward logs.
Select
Objects > Log Forwarding
.
Select the
Device Group
in which you added the policy rules, for example, Remote_Network_Device_Group.
Add
a Log Forwarding profile. In the log forwarding profile match list,
Add
each
Log Type
that you want to forward.
Select
Panorama/Cortex Data Lake
as the Forward Method to enable Prisma Access to forward the logs to Cortex Data Lake. You will be able to monitor the logs and generate reports from Panorama. Cortex Data Lake provides a seamless integration to store logs without backhauling them to your Panorama at the corporate headquarters, and Panorama can query Cortex Data Lake as needed.
The following example enables forwarding of Traffic, Threat Prevention, WildFire Submission, URL Filtering, Data Filtering, and Authentication logs to Cortex Data Lake.

Select
Policies > Security
and edit the policy rule. In
Actions
, select the Log Forwarding profile you created.
Commit all your changes to Panorama and push the configuration changes to Prisma Access.
Click
Commit
Commit to Panorama
.
Click
Commit
Push to Devices
and click
Edit Selections
.
On the
Prisma Access
tab, make sure
Prisma Access for networks
is selected and then click
OK
.
Click
Push
.
Check the remote network status.