Configure Prisma Access for Networks
For each remote network that you want to secure using Prisma Access for networks, you must use the following workflow to push the required policy configuration to the cloud service and onboard each remote network so that you can start sending traffic from the remote site through the IPSec tunnel to Prisma Access.
Before you begin onboarding your remote networks, be sure you go through the steps to Plan to Deploy Prisma Access for Networks.
If you need to onboard many remote network locations, onboard a remote network using this workflow and then import the remote network configuration.
- Selectand edit the settings by clicking the gear icon in thePanoramaCloud ServicesConfigurationRemote NetworksSettingsarea.
- In the Templates section,Addany 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 canAddmore than one template to the stack and then order them appropriately usingMove UpandMove 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.
- Select theParent Device Groupfor Prisma Access for remote networks. You can select an existing device group or useShared.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.
- If you will be configuring remote networks that have overlapping subnets, select theOverlapped Subnetscheck 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) ConfigureDNS Proxysettings 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 theRemote_Network_Device_Groupdevice group, selectandPoliciesSecurityAdda security policy rule with anApplicationofDNSand anActionofAllowto 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 AccessRemote Network DNS Proxy IP Addressas the primary DNS server and use your DNS server as secondary DNS server. You can get this DNS proxy IP from.PanoramaCloud ServicesStatusNetwork DetailsService Infrastructure
- Addone or more DNS proxy settings, entering the following values:
- ForInternal Domains:
- Select aRegion(North America & South America,Africa, Europe & Middle East, orAsia, Australia & Japan), or specifyWorldwideto 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’sEBGP RouterIP 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 thePrimary DNSandSecondary DNSservers 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 theDomain 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.
- ForExternal Domains:
- Enter aPrimary DNSchoice.To use the default Prisma Access DNS server, selectUse Cloud Default. To use the same server that you use to resolve internal domains, selectSame as Internal Domains. To use third-party or public DNS server, selectCustom DNS Server, then specify the IP address of the DNS server.
- Enter aSecondary DNSchoice, choosing from the same options you chose for thePrisma DNS.
- (Optional) Configure Prisma Access to use the Directory Sync service to retrieve user and group information.You must configure Directory Sync to retrieve user and group information from your Active Directory (AD) before you enable and configure Directory Sync integration in Prisma Access using the settings in theGroup Mapping Settingstab. See Get User and Group Information Using Directory Sync for details.
- 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 clickAddto move it to the list ofTrusted Zones.
- ClickOKto save the mappings.
- ClickAddin the Onboarding settings, and specify aNameto 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).Note that 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, selectNoneforECMP Load Balancingand continue to Step 9.Specify a minimumBandwidthof50 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.
- Addan 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 to0xFFFE: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-premise 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 aLocal Addressis 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.
- SecretandConfirm 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 theLocationin 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.See this table for a list of Prisma Access locations.
- Select theBandwidthyou 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. See How to Calculate Remote Network Bandwidth for more details and suggestions. If you enableECMP 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 the500 Mbps (w/o SSL Decryption)or1000 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 theService IP addressand 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 newIPSec Tunnelconfiguration 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 thatIPSec Tunnelfrom 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.User 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, clickNew IPSec Tunnel, give it aNameand 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 theProxy IDstab,Adda 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.
- LeaveEnable Replay Protectionselected to detect and neutralize against replay attacks.
- SelectCopy TOS Headerto 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, selectTunnel Monitor.
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, click thePanoramaCloud ServicesStatusNetwork DetailsService Infrastructureradio button, and find theTunnel Monitor IP Address.
- Enter aDestination IPaddress.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 aProxy IDor add aNew Proxy IDthat 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 theLocalIP subnet and the branch location’s subnet (10.1.1.0/24 in this example) as theRemotesubnet.The following figure shows the Proxy ID you created being applied to the tunnel monitor configuration by specifying it in theProxy IDfield.
- If you have a secondary WAN link at this location, selectEnable 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.
- 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 configureStatic Routes,BGP, or a combination of both.
- To configureStatic Routes:
- On theStatic Routestab, clickAddand enter the subnetwork address (for example, 220.127.116.11/24) 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 configureBGP:
- Select theBGPtab.
- If you selectNoneforECMP Load Balancing, enter the BGP choices.
- To enable BGP for the remote network connection, selectEnable.When you enable BGP, Prisma Access sets the time to life (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, selectSummarize Mobile User Routes before advertising.Prisma Access sets the community string for aggregated mobile user routes to0xFFFE:0xFFF0.
- To allow Prisma Access to advertise a default route for the remote network using eBGP, selectAdvertise Default Route.If you selectAdvertise 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.
- To prevent the BGP peer on the Prisma Access firewall from forwarding routes into your organization’s network, selectDon’t Advertise Prisma Access Routes.
- Enter thePeer 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 thePeer Address.
- (Optional) Enter an address that Prisma Access uses as its Local IP address for BGP.Local Addressis 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 BGPLocal Address.
- (Optional) Enter and confirm a passphrase to authenticate BGP peer communications.
- (Optional) If you configured aSecondary WANand you need to change thePeer AddressorLocal Addressfor the secondary (backup) BGP peer, deselectSame as Primary WANand 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 anUPstate, 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, enableQuality of Servicefor the remote network connection and specify a QoS profile or add aNew 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-premise device, or both PAN-OS-marked and on-premise-marked traffic. See Configure Quality of Service in Prisma Access for details.
- Commit the configuration changes to Panorama and push the configuration out to Prisma Access for networks.
- Click.CommitCommit to Panorama
- Click. ClickCommitCommit and Push, and select both Prisma Access for networks and Prisma Access for service setup to push the configuration out to the service.Edit SelectionsPrisma Access
- Configure the IPSec-capable device at the remote network location to set up an IPSec connection with Prisma Access for networks.
- Find theService IP Addressfor this remote network connection by selecting, clicking thePanoramaCloud ServicesStatusNetwork DetailsRemote Networksradio button, and viewing theService IP Addressfield. 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 theLocal IP addressfor the device at the remote network location on thepage. If you are performing NAT at the remote network location, thePanoramaCloud ServicesStatusNetwork DetailsRemote NetworksLocal IP addressdisplays the IP address of the device after NAT.
- To secure traffic at the remote network location you must create security policy rules.
- Select theDevice Groupin 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.
- 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.
- SelectObjects > Log Forwarding.
- Select theDevice Groupin which you added the policy rules, for example, Remote_Network_Device_Group.
- Adda Log Forwarding profile. In the log forwarding profile match list,AddeachLog Typethat you want to forward.
- SelectPanorama/Logging Serviceas 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.
- SelectPolicies > Securityand edit the policy rule. InActions, select the Log Forwarding profile you created.
- Commit all your changes to Panorama and push the configuration changes to Prisma Access.
- Click.CommitCommit to Panorama
- Clickand clickCommitPush to DevicesEdit Selections.
- On thePrisma Accesstab, make surePrisma Access for networksis selected and then clickOK.
Verify Remote Network Connection Status
to verify that the remote network connections have been successfully deployed.
Deployment Statusarea allows you to view the progress of onboarding and deployment jobs before they complete, as well as see more information about the status of completed jobs. See Deployment Progress and Status for details.
To display a map that shows the locations of the remote networks in the regions you have selected, select
and click the
Select a region to get more detail about that region.
Click the tabs below the map to see additional remote network statistics.
- Location—The location where your remote network is deployed.
- Remote Peer—The peer to which the remote network has an IPSec tunnel connection.
- Allocated Bandwidth (Mbps)—The amount of bandwidth you allocated for the remote network location.To enable traffic peaks, the service allows you to go 10% over the allocated bandwidth for each site; traffic overages above this peak limit is dropped.
- ECMP—Whether you have enabledECMP Load Balancingon this remote network connection.
- Config Status—The status of your last configuration push to the service. If you have made a change locally, and not yet pushed the configuration to the cloud, the status showsOut of sync. Hover over the status indicator for more detailed information. After committing and pushing the configuration to Prisma Access, the Config Status changes toIn sync.
- BGP Status—Displays information about the BGP state between the firewall or router at the remote network location and Prisma Access. Although you might temporarily see the status pass through the various BGP states (idle,active,open send,open pend,open confirm, most commonly, the BGP status shows:
- Connect—The router at the remote network location is trying to establish the BGP peer relationship with Prisma Access.
- Established—The BGP peer relationship has been established.This field will also show if the BGP connection is in an error state:
- Warning—There has not been a BGP status update in more than eight minutes. This may indicate an outage on the firewall.
- Error—The BGP status is unknown.
- Tunnel Status—The operational status of the connection between Prisma Access and the remote network.
- Location—The location where your remote network is deployed.
- Remote Peer—The corporate location to which this remote network is setting up an IPSec tunnel.
- Allocated Bandwidth (Mbps)—The amount of bandwidth you allocated for the remote network location.
- Ingress Bandwidth (Mbps)—The bandwidth from the remote network location to Prisma Access.For the Ingress Bandwidth, Ingress Peak Bandwidth, Egress Bandwidth, and Egress Peak Bandwidth fields, when the bandwidth consumption on a remote network goes beyond 80% of the allocated bandwidth, the numbers display in a red color.
- Ingress Peak Bandwidth (Mbps)—The peak load from the remote network location into the cloud service.
- Egress Bandwidth (Mbps)—The bandwidth from Prisma Access into the remote network location.
- Egress Peak Bandwidth (Mbps)—The peak load from Prisma Access into the remote network location.
- QoS—Select this button to display a graphic chart that shows a real-time and historical QoS statistics, including the number of dropped packets per class. This chart displays only for service connections or remote network connections that have QoS enabled.
Verify Remote Connection BGP Status
If you configured BGP, you can check its status by selecting
Show BGP Status
The BGP Status dialog displays. This table provides you with the following information:
- Peer—Routing information for the BGP peer, including status, total number of routes, configuration, and runtime statistics and counters. The total number of routes display in thebgpAfiIpv4-unicast Countersarea, in theIncoming TotalandOutgoing Totalfields.
- RIB In—Routing information that has been received from different peers and is stored in the Routing Information Base (RIB).
- RIB Out—Routing information that Prisma Access advertises to its peers through BGP update messages. See How BGP Advertises Mobile User IP Address Pools for Service Connections and Remote Network Connections for an example of this table and for information about how BGP utilizes the IP address pool you create for mobile users.
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