ISE¶

Identity Services Engine (ISE)

Adding RADIUS Clients¶

Creating Locations¶

Go to Administration > Network Device Groups

ise radius

Add a group, for example:

ise radius

Adding Devices to ISE¶

Go to Administration > Network Devices

ise radius

Fill in all the details

ise radius

Authenticator Configuration¶

See https://docs.calebsargeant.com/en/latest/networking/cisco/switching/aaa.html#RADIUS

ISE and AD¶

Joining ISE to AD¶

Go to Administration > External Identity Sources

ise ad

Click on Active Directory and click on Add

ise ad

Input the details and click Submit

ise ad

Click Yes

ise ad

Authenticate

ise ad

You will see the Computer object in AD

ise ad

Identity Sources¶

Go to Administration > Identity Source Sequences

ise ad

Click Add

ise ad

Modify the Identity Source Sequence accordingly

ise ad

Wired Dot1x Switch Config¶

Global Config¶

# use the radius server for dot1x authentication
aaa authentication dot1x default group radius
# use the radius server for authorization
aaa authorization network default group radius

# use the radius server for accounting
aaa accounting dot1x default start-stop group radius

# include IP Address of supplicant request in accounting
radius-server attribute 8 include-in-access-req

# enable dot1x
dot1x system-auth-control

Switchport Config¶

int g0/xx
switchport host
#set the mode
authentication host-mode multi-auth

#set authentication type
authentication open

#set recurring authentication
authentication periodic

#let server decide how often to reauthenticate
authentication timer reauthenticate server

# set Port Access Entity to act as authenticator
dot1x pae authenticator

# supplicant retry timeout (sec)
dot1x timeout tx-period 10

# enable 802.1x control of port
authentication port-control auto

Verification¶

CT-SW-99#sh dot1x all
Sysauthcontrol             Disabled
Dot1x Protocol Version            3
Dot1x Info for GigabitEthernet0/30
-----------------------------------
PAE                       = AUTHENTICATOR
PortControl               = AUTO
ControlDirection          = Both
HostMode                  = MULTI_AUTH
QuietPeriod               = 60
ServerTimeout             = 0
SuppTimeout               = 30
ReAuthMax                 = 2
MaxReq                    = 2
TxPeriod                  = 10

# show authentication status
sh authen int g0/30

# show authentication sessions
sh authen session int g/30

# debug
debug radius authentication

ISE CA Certificates¶

Due to installing a PKI integrated into AD, ISE will automatically receive a certificate from AD, upon joining the domain. If this does not happen, add the ROOT CA Certificate by going to Administration > System > Certificates > Trusted Certificates and click on Import

ise cert

Choose the Certificate File downloaded from the Root CA, give it a Friendly Name, smash the Trust checkboxes and click on Submit.

ise cert

To generate a CSR, go to Certificate Signing Requests and click on Add, fill in the details and click on Generate.

ise cert

802.1x MAB (Mac Address Bypass)¶

Switch Config¶

CT-SW-99#conf t
# send over the MAC Address of the device being authenticated by switch (authenticator) to ISE (authentication server) - required for MAB
CT-SW-99(config)#radius-server attribute 6 on-for-login-auth
CT-SW-99(config)#radius-server attribute 25 access-request include

# enable mab for the interface and config the order of authentication
CT-SW-99(config)#int g0/30
CT-SW-99(config-if)#mab
CT-SW-99(config-if)#authentication order mab dot1x