Subscriber ID Security in a 5G Network
Secure your 5G traffic with Security policy rules that specify source subscriber identifiers.
Detection of threats in 5G mobile networks requires identification of compromised subscribers and users. Prevention requires the ability to apply network security based on subscriber ID, which is Subscriber Permanent Identifier (SUPI) including International Mobile Subscriber Identity (IMSI).
You can now apply network security based on the subscriber identity of subscribers and users trying to access your 5G network. Security policy rules and correlation based on 5G SUPI including IMSI are supported on:
- PA-7000 Series firewalls that use the PA-7000-100G-NPC, and the PA-7050-SMC-B card or PA-7080-SMC-B card, and the PA-7000-LFC card (the firewall must use all three cards)
- PA-5200 Series firewalls
- VM-700, VM-500, VM-300, and VM-100 firewalls
When deciding which firewall model to purchase, consider the total number of 3G, 4G, and 5G network identifiers (Subscriber IDs and Equipment IDs) you need to include as external dynamic list (EDL) entries or static entries. Each firewall model supports a number of EDL entries and static entries.
- Enable GTP Security, commit, and reboot the firewall.
- Enable inspection of 5G HTTP/2 control packets and content inspection of GTP-U packets; create a Mobile Network Protection profile.
- Create address objects for the IP addresses assigned to the network elements in your topology, such as the AMF on the N11 interface, the gNB on the N3 interface, the SMF on the N11 interface, and the UPF on the N3 interface.
- (Optional) Create an External Dynamic List (EDL) of TypeSubscriber Identity List; theSourceof the list provides access to a server that provides identifiers of subscribers connected to the 5G network, for which you want to allow (or deny) traffic.
- Create a Security policy rule that applies your Mobile Network Protection profile to application traffic.
- SelectandPoliciesSecurityAdda Security policy rule byName.
- ForSource Address,Addthe address objects for the 5G element endpoints on the N3 and N11 interfaces that you want to allow.
- ForDestination,AddtheDestination Addressaddress objects for the 5G element endpoints on the N3 and N11 interfaces that you want to allow.
- AddtheApplicationsto allow, such asgtp-ufor the user plane andweb-browsing, which has HTTP/2.
- On theActionstab, select theAction, such asAllow, and select theMobile Network Protectionprofile you created.
- Create another Security policy rule based on Subscriber ID.
- SelectandPoliciesSecurityAdda Security policy rule byName, for example, 5G Subscriber ID Security.
- SelectSourcetab andAddaSource Zoneor selectAny.
- Addone or moreSource SubscriberIDs (if you configured an EDL, specify that EDL.
- 5G Subscriber Permanent Identifier (SUPI) including IMSI
- IMSI (14 or 15 digits)
- Range of IMSI values separated by a hyphen
- IMSI prefix of six digits with an asterisk (*) as the wildcard after the prefix; for example, 926789*.
- EDL that specifies IMSIs
- SpecifyDestination Zone,Destination Address, andDestination DeviceasAny.
- AddtheApplicationsto allow, for example,youtube,
- On theActionstab, select theAction, such asAllow.
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