Radius Capture
This scenario shows how to capture and filter RADIUS messages after 802.1x authentication.
Test 802.1x RADIUS Station-ID
Description
DUT0 is configured with an 802.1x authenticated interface and DUT1 acts as an 802.1x supplicant. RADIUS messages are captured in DUT0 to check if Station-Id attributes are included.
Scenario
Step 1: Set the following configuration in DUT0
:
set interfaces ethernet eth0 address 10.215.168.64/24 set interfaces ethernet eth1 802.1x authenticator aaa accounting list1 set interfaces ethernet eth1 802.1x authenticator aaa authentication list1 set interfaces ethernet eth1 802.1x authenticator reauth-period 0 set interfaces ethernet eth1 address 192.168.100.1/24 set system aaa group radius radgroup1 server serv1 set system aaa list list1 method 1 group radius radgroup1 set system aaa server radius serv1 address 10.215.168.1 set system aaa server radius serv1 encrypted-key U2FsdGVkX1/2BXH8loEgPy9CMIPf+WXR5cLO6l1UmYp/WPkO47g/dUKiGAtTArVYpknZUblF2aqaD0Px9Qt4vA== set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 2: Ping IP address 10.215.168.1
from DUT0
:
admin@DUT0$ ping 10.215.168.1 count 1 size 56 timeout 1Show output
PING 10.215.168.1 (10.215.168.1) 56(84) bytes of data. 64 bytes from 10.215.168.1: icmp_seq=1 ttl=64 time=0.164 ms --- 10.215.168.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.164/0.164/0.164/0.000 ms
Note
Start packet capture in DUT0 to filter RADIUS messages
Step 3: Set the following configuration in DUT1
:
set interfaces ethernet eth1 802.1x supplicant encrypted-password U2FsdGVkX1/Vp9ce61EpItXjckQJsiP/R7cuLR63QLU= set interfaces ethernet eth1 802.1x supplicant username testing set interfaces ethernet eth1 address 192.168.100.2/24 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 4: Run command interfaces ethernet eth1 802.1x supplicant show status
at DUT1
and check if output contains the following tokens:
Authorized
Show output
--------------------------------------------------- Field Value --------------------------------------------------- EAP State SUCCESS EAP TLS Cipher ECDHE-RSA-AES256-GCM-SHA384 EAP TLS Version TLSv1.2 PAE State AUTHENTICATED Supplicant Port Status Authorized WPA State COMPLETED
Step 5: Ping IP address 192.168.100.1
from DUT1
:
admin@DUT1$ ping 192.168.100.1 count 1 size 56 timeout 1Show output
PING 192.168.100.1 (192.168.100.1) 56(84) bytes of data. 64 bytes from 192.168.100.1: icmp_seq=1 ttl=64 time=0.316 ms --- 192.168.100.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.316/0.316/0.316/0.000 ms
Note
Stop packet capture in DUT0
and expect
the following RADIUS messages:
Show output
tcpdump: listening on eth0, link-type EN10MB (Ethernet), snapshot length 262144 bytes 10:58:57.168178 de:ad:be:ef:6c:00 > fe:30:25:85:be:19, ethertype IPv4 (0x0800), length 187: (tos 0x0, ttl 64, id 6363, offset 0, flags [none], proto UDP (17), length 173) 10.215.168.64.41093 > 10.215.168.1.1813: [bad udp cksum 0x669a -> 0x674e!] RADIUS, length: 145 Accounting-Request (4), id: 0x0b, Authenticator: d505476a0aceb9002a08ba41fa758a0b Acct-Status-Type Attribute (40), length: 6, Value: Start 0x0000: 0000 0001 Acct-Authentic Attribute (45), length: 6, Value: RADIUS 0x0000: 0000 0001 User-Name Attribute (1), length: 9, Value: testing 0x0000: 7465 7374 696e 67 Called-Station-Id Attribute (30), length: 20, Value: DE-AD-BE-EF-6C-01: 0x0000: 4445 2d41 442d 4245 2d45 462d 3643 2d30 0x0010: 313a NAS-Port-Type Attribute (61), length: 6, Value: Wireless - IEEE 802.11 0x0000: 0000 0013 Service-Type Attribute (6), length: 6, Value: Framed 0x0000: 0000 0002 Calling-Station-Id Attribute (31), length: 19, Value: DE-AD-BE-EF-6C-11 0x0000: 4445 2d41 442d 4245 2d45 462d 3643 2d31 0x0010: 31 Connect-Info Attribute (77), length: 23, Value: CONNECT 0Mbps 802.11b 0x0000: 434f 4e4e 4543 5420 304d 6270 7320 3830 0x0010: 322e 3131 62 Acct-Session-Id Attribute (44), length: 18, Value: 2F21A3B2965068EC 0x0000: 3246 3231 4133 4232 3936 3530 3638 4543 Event-Timestamp Attribute (55), length: 6, Value: Wed Oct 30 10:58:57 2024 0x0000: 6722 1171 Acct-Delay-Time Attribute (41), length: 6, Value: 00 secs 0x0000: 0000 0000 1 packet captured 2 packets received by filter 0 packets dropped by kernel admin@osdx$