Cisco ISE and Firepower can exchange attributes such as TrustSec SGT (Security Group Tag), endpoint profile information and IP address via pxGrid. These attributes can then be used in Firepower Access Control Policies to permit/deny access as required. In addition, this integration can also be used to quarantine users/hosts in the event the user performs a malicious activity. When Firepower detects the malicious activity this will match a correlation rule on the FMC, which instructs ISE to perform a remediation action such as sending a CoA (Change of Authorization) and quarantining the user by apply a DACL and/or applying a new SGT.
This post will describe how to configure the pxGrid integration between the FMC and ISE, it is assume that you already have a working ISE environment with users/computers authenticating using dot1x and a working Firepower FMC/FTD environment.
Refer to these previous ISE posts on how to configure ISE, dot1x authentication and more information about configuring TrustSec.
The following software versions were used:-
- Firepower Management Centre 220.127.116.11
- Firepower Threat Defence Virtual 18.104.22.168
- Identity Services Engine 2.4
- Windows Server 2008 R2 (Domain Controller and PKI)
- Windows 7 Enterprise
Continue reading “Cisco ISE pxGrid integration with Firepower”
Cisco TrustSec can be used to segment a network, it classifies traffic and assigns Security Group Tags (SGTs), these tags can be used to enforce (permit/deny traffic at any point in the network.
Classification of traffic can be performed dynamically by ISE depending on the users’ group membership, device type or health (posture) of the computer at time of authentication to the network. The SGTs are propagated throughout the network using 2 methods, inline tagging or SXP. Enforcement can be performed anywhere in the network on Cisco switches, routers, firewalls using a TrustSec Policy which can permit/deny traffic based on source/destination SGT.
In this blog post we will setup a simple lab, with an Access Layer Switch (Cisco Catalyst 3560) and an Enforcement Point (CSR1000v Router). Users will authenticate to the network using 802.1x with Cisco ISE (v2.4) as the RADIUS server, this will authorise the user and assign an SGT depending on AD group membership. This SGT will be downloaded to the Access Layer Switch, in turn using SXP, the switch will send the SGT binding to the Enforcement Point router. These SGTs will be used in a TrustSec Policy as the source.
The Servers will be manually classified using IP SGT Mappings on ISE and sent to the Enforcement Point using SXP, this SGT will be used in a TrustSec Policy as the destination.
A TrustSec Policy will be defined on ISE and downloaded to the Enforcement Point, and permit/deny traffic to the servers from Users’ SGT.
Continue reading “Cisco TrustSec Enforcement using Cisco ISE”