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CCNP Wireless Security

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Answer 50 questions in 15 minutes.
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1. What is the radius server override interface option under WLAN-->AAA?
1. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself
Sends RADIUS packets from a dynamic interface instead of the WLC Mgmt interface address
300ms
Clients send info re: previously associated aps to current ap - so it can use this information to inform current clients about neighboring aps. Requires CCXv2

2. What does IBN allow you to assign
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)
Clients send info re: previously associated aps to current ap - so it can use this information to inform current clients about neighboring aps. Requires CCXv2
Inter Access Point Protocol uses UDP between aps to exchange information about new aps (announce) in the area and handoffs that have occurred when client roams
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes

3. Whats added in CCXv5?
1. Interfac Configuration --> RADIUS (IETF) --> check 64 (Tunnel Type) - 65 (Tunnel Medium Type) - 81 (Tunnel Private-group-id) 2. Navigate to Group Setup and enable the checkboxes for the previous attributes - where 64=VLAN - 65=802 - 81=<Vlan_tag>
MFP-1 protects infrastructure from management frame attacks (ie aps only). MFP-2 Protects both infrastructure & clients
mfp-v2
1. User performs .1x with RADIUS 2. WLC forwards radius accounting start to NAM (along with clients IP) 3. clients NAA detects network con. & tries to connect to NAM. 4. NAS Intercepts step 3 & contacts NAM itself to see if client is in the online li

4. What must be configured for SSO authentication to work
checking allow aaa over-ride in the wlan-->advanced.
1. Wireless-->AP Global Config-->enable dot1x w/ user/pass 2. Config the switch port to enable auth. to ACS/RADIUS
Asymetric (public & Private key-pair)
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC

5. When submitting a CSR from ACS
what must you ensure -1.Exportable 2.Server Auth Cert 3.Store cert in local cert store
what occurs as a client roams to new ap -WLC forwards cached PMK to AP. Client then forms a Pairwise Transient Key (PTK) via 4-way handshake w/ ap.
Proactive Key Caching (PKC) or CCKM
1. Interfac Configuration --> RADIUS (IETF) --> check 64 (Tunnel Type) - 65 (Tunnel Medium Type) - 81 (Tunnel Private-group-id) 2. Navigate to Group Setup and enable the checkboxes for the previous attributes - where 64=VLAN - 65=802 - 81=<Vlan_tag>

6. 2 different types of wIPS deployment
1. Integrated -- wIPS monitor mode aps are part of client-serving infrastructure 2. Overlay -- wIPS aps - WCS & WLCs are totally seperate
1. CBC-DES 2. CFB-AES-128
PKI
Only when all the RADIUS servers defined globally are unreachable. (ie. even if not called out under WLAN-->AAA - the global RADIUS servers will be used instead of local profile)

7. Briefly describe eap-mschapv2
PKI
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
specifies fast bss transitions by allowing negotiations and requests for wireless resources to occur simultaneously. Does this by allowing for part of the key to be cached (server key) among the network - so full 802.1x auth. isnt required
used with PEAP for user/password authentication

8. How is OEAP encrypted
DTLS (Datagram Transport Layer Security)
x509 cert to establish DTLS capwap control tunnel. It can be either 1. LSC 2. MIC (Mafctr installed cert) or 3. SSC
1. Interfac Configuration --> RADIUS (IETF) --> check 64 (Tunnel Type) - 65 (Tunnel Medium Type) - 81 (Tunnel Private-group-id) 2. Navigate to Group Setup and enable the checkboxes for the previous attributes - where 64=VLAN - 65=802 - 81=<Vlan_tag>
US: 1. HIPAA 2. GLBA 3. FFIEC 4. SOX 5. FIPS 6. NIAP Canada: 1. PIPEDA Japan: 1. JPIPA

9. How is IBN implemented on a WLAN
checking allow aaa over-ride in the wlan-->advanced.
Security --> Advanced --> CIDS --> Sensors
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network
x509v3 certificate

10. WLC Tacacs+ roles
Corrospond to top-menu GUI items (wireless - security - monitor etc)
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
1812 - Authentication 1813 - Authorization
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc

11. Enhanced Neighbor list - E2E
Inter Access Point Protocol uses UDP between aps to exchange information about new aps (announce) in the area and handoffs that have occurred when client roams
Allows intel clients to request a neighbor list at will.
1. PMK is only valid for 1 hour -- CCKM creates a main key & derives secondary keys. These secondary keys are sent to all wlc/aps.
PKI

12. NAC Deployment Types
1. In-band virtual gateway -- is at L2 and intercepts all traffic and re-tags the default/untrusted vlan to the trusted vlan - based on compliance 2. In-Band Real IP Gateway - is the gateway 3. Out-of-band virtual gateway (same is 1 - except traffic
WLC generates a Message Integrity Check Information Element (MIC IE) - which includes a sequence # - and aps add it to each mgmt frame. Clients ignore this IE - as they do not understand it.
Proactive Key Caching (PKC) or CCKM
1. CBC-DES 2. CFB-AES-128

13. Authentication types used by SNMPv3
100 local accounts max
assigning multiple vlans to single wlan - and users are dynamically mapped to one of the vlans in round-robin
1. HMAC-MD5 2. HMAC-SHA
1. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself

14. What does FIPS-2 require for WLC to RADIUS communications
AES-Key Wrap
used with PEAP for user/password authentication
clients are load ballanced between them - this can not be configured otherwise.
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS

15. What is HREAP Local Auth limitation
Asymetric (public & Private key-pair)
US: 1. HIPAA 2. GLBA 3. FFIEC 4. SOX 5. FIPS 6. NIAP Canada: 1. PIPEDA Japan: 1. JPIPA
100 local accounts max
clients are load ballanced between them - this can not be configured otherwise.

16. How does client MFP work
1. RSSI 2. SNR 3. Load-Ballancing
no
WLC RADIUS server only works if passwords are sent in Clear-text from LDAP.
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame

17. What are virtual domains used for in WCS
specifies fast bss transitions by allowing negotiations and requests for wireless resources to occur simultaneously. Does this by allowing for part of the key to be cached (server key) among the network - so full 802.1x auth. isnt required
Controll is (mgmnt) not data. To encrypt data: check data encryption under advanced tab of ap config
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs
uses TLS to secure other eap methods like certs - user/pass - smart cards. Identifies itself to client with certificate. Utilizes: fast reconnect (faster roaming w/ key caching) and server authentication

18. Things to Enable in ACS (Global Authentication Page) for PEAP support
when you want some wlcs to be part of the same mobility group - but not others.
100 local accounts max
DTLS (Datagram Transport Layer Security)
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC

19. Why add an IPS if WLCs already detect attacks.
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
HTTPS
switchport mode access - dot1x pae authenticator - dot1x port-control auto
WLC can detect 802.11 attacks - but not other attacks from valid wireless clients.

20. Steps to adding an IPS
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs
Asymetric (public & Private key-pair)
It handles .1x & NAC auth. with Single Sign on. WLC forwards RADIUS accounting messages (of EAPOL Success) to the NAC upon login - authing the client to nac - & then it goes through posturing
1. Create user acct. in IDS for each WLC in the viewer role 2. add the WLCs IP as an allowed host 3. Obtain the IPS TLS Fingerprint & add it to WLC 4. Enable the client exclusion policy on the WLAN 5. Set msg log level to Alerts to log IPS events

21. Steps to configure wlcs for guest wlan
1. config mobility list to support anchor & foreign wlcs (using different mob. groups on ea. to keep auth. seperate between anchor & foreigns) 2. Map the guest wlan on foreign wlc to either mgmt int. or fake dynamic int. (ie dynamic int tied to a vla
x509v3 certificate
1. PMK is only valid for 1 hour -- CCKM creates a main key & derives secondary keys. These secondary keys are sent to all wlc/aps.
1. Wireless-->AP Global Config-->enable dot1x w/ user/pass 2. Config the switch port to enable auth. to ACS/RADIUS

22. How to add IPS TLS info to WLC
UDP 5246 & 5247
HTTPS
1. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself
Security --> Advanced --> CIDS --> Sensors

23. Steps to roaming in 802.1R
1. Interfac Configuration --> RADIUS (IETF) --> check 64 (Tunnel Type) - 65 (Tunnel Medium Type) - 81 (Tunnel Private-group-id) 2. Navigate to Group Setup and enable the checkboxes for the previous attributes - where 64=VLAN - 65=802 - 81=<Vlan_tag>
same as steps to roaming in non-802.1R except: skips PMK negotiation & piggybacks PTK & QoS with the 802.11 authentication & association messages
Asymetric (public & Private key-pair)
1. CBC-DES 2. CFB-AES-128

24. Client Roaming Reasons
what must you ensure -1.Exportable 2.Server Auth Cert 3.Store cert in local cert store
1. RSSI 2. SNR 3. Load-Ballancing
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
Sends RADIUS packets from a dynamic interface instead of the WLC Mgmt interface address

25. Main elements of a NAC deployment
assigning multiple vlans to single wlan - and users are dynamically mapped to one of the vlans in round-robin
no
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
1. NAC Guest Server (NGS) - Like a RADIUS server when people can create guest accounts 2. Nac Manager (NAM) - Centrilized server for creating policies & profiles that determine network access. 3. Network Access Server (NAS) - The device which control

26. What are mping and eping used for from the wlc cli
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)
switchport mode access - dot1x pae authenticator - dot1x port-control auto
PKI
Only when all the RADIUS servers defined globally are unreachable. (ie. even if not called out under WLAN-->AAA - the global RADIUS servers will be used instead of local profile)

27. Steps to auth with NAA w/ SSO
DTLS (Datagram Transport Layer Security)
1. User performs .1x with RADIUS 2. WLC forwards radius accounting start to NAM (along with clients IP) 3. clients NAA detects network con. & tries to connect to NAM. 4. NAS Intercepts step 3 & contacts NAM itself to see if client is in the online li
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network
x509v3 certificate

28. What is NGS & whats it used for
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
clients are load ballanced between them - this can not be configured otherwise.
1. NAC Guest Server (NGS) - Like a RADIUS server when people can create guest accounts 2. Nac Manager (NAM) - Centrilized server for creating policies & profiles that determine network access. 3. Network Access Server (NAS) - The device which control
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -

29. How is IBN-QoS
clients are load ballanced between them - this can not be configured otherwise.
802.11i - 802.11r - 802.11w & 802.11n
Does not require re-authentication when a client roams - in an 802.1x/WPA2 environment
ACL - or Interface-name configured in ACS -1. Interface Configuration --> RADIUS (Cisco Airspace) and check off: Air-Qos-Level - Aire-DSCP - Aire-802.1p tag - Aire-Interface-name - Air-ACL-Name

30. What CCX version is required for CCKM
used with PEAP for user/password authentication
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
Does not require re-authentication when a client roams - in an 802.1x/WPA2 environment
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc

31. What does Proactive Key Caching do
WLC generates a Message Integrity Check Information Element (MIC IE) - which includes a sequence # - and aps add it to each mgmt frame. Clients ignore this IE - as they do not understand it.
1. Interfac Configuration --> RADIUS (IETF) --> check 64 (Tunnel Type) - 65 (Tunnel Medium Type) - 81 (Tunnel Private-group-id) 2. Navigate to Group Setup and enable the checkboxes for the previous attributes - where 64=VLAN - 65=802 - 81=<Vlan_tag>
Sends the PMK to all WLCs that the client can roam to.
on the WLC -1. Configure an Access vlan & check the quarentine vlan - giving it the quarentine vlan tag 2. on wired net connect the Quarenteen vlan to the untrusted NAS interface. 3. Connect the access vlan to the trusted int. on the nas 4. config sn

32. What ports does OEAP use to connect to anchor WLC
UDP 5246 & 5247
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
1. RSSI 2. SNR 3. Load-Ballancing
uses TLS to secure other eap methods like certs - user/pass - smart cards. Identifies itself to client with certificate. Utilizes: fast reconnect (faster roaming w/ key caching) and server authentication

33. 3 categories of segmented traffic
no
Only when all the RADIUS servers defined globally are unreachable. (ie. even if not called out under WLAN-->AAA - the global RADIUS servers will be used instead of local profile)
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC
1. application type 2. security capabilities 3. QoS policy

34. When PKC is used
1. Off (default) - moves down list and uses next server indefinately. 2. Passive -- Upon failure - server is marked as inactive for (300 seconds) then is put back in list and tried again (if its highest priority). 3. Active -- Actively probes failed
assigning multiple vlans to single wlan - and users are dynamically mapped to one of the vlans in round-robin
Sends the PMK to all WLCs that the client can roam to.
what occurs as a client roams to new ap -WLC forwards cached PMK to AP. Client then forms a Pairwise Transient Key (PTK) via 4-way handshake w/ ap.

35. Is data encrypted over a capwap tunnel?
MFP
clients are load ballanced between them - this can not be configured otherwise.
Only when all the RADIUS servers defined globally are unreachable. (ie. even if not called out under WLAN-->AAA - the global RADIUS servers will be used instead of local profile)
Controll is (mgmnt) not data. To encrypt data: check data encryption under advanced tab of ap config

36. Reason why you can NOT use WLC RADIUS server to auth. against OpenLDAP or Win-2003 (or later)
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
WLC RADIUS server only works if passwords are sent in Clear-text from LDAP.
Allows intel clients to request a neighbor list at will.
same as steps to roaming in non-802.1R except: skips PMK negotiation & piggybacks PTK & QoS with the 802.11 authentication & association messages

37. 3 modes of radius fallback
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML
x509 cert to establish DTLS capwap control tunnel. It can be either 1. LSC 2. MIC (Mafctr installed cert) or 3. SSC
1. disassociation 2. deauthentication 3.QoS (WMM)
1. Off (default) - moves down list and uses next server indefinately. 2. Passive -- Upon failure - server is marked as inactive for (300 seconds) then is put back in list and tried again (if its highest priority). 3. Active -- Actively probes failed

38. 6 criteria types for rogue classification
uses certificates
1. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself
1812 - Authentication 1813 - Authorization
1. RSSI 2. Duration 3. Client Count 4. No encryption 5. Managed SSID (ie UNLV) 6. SSID

39. RADIUS UDP Ports
1812 - Authentication 1813 - Authorization
ACL - or Interface-name configured in ACS -1. Interface Configuration --> RADIUS (Cisco Airspace) and check off: Air-Qos-Level - Aire-DSCP - Aire-802.1p tag - Aire-Interface-name - Air-ACL-Name
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC
1. VLAN Mapping 2. WLAN Ordering 3. WLAN Configuration

40. What does Fast Secure Roaming use re: Keying
1. Log into cert. server - from ACS -and click link to install it locally 2. Log into ACS and install cert into local store 3. DL cert chain from CA to ACS store 4. Tell ACS to use that cert from its store 5. restart ACS 6. log back into ACS and inst
Proactive Key Caching (PKC) or CCKM
1. In-band virtual gateway -- is at L2 and intercepts all traffic and re-tags the default/untrusted vlan to the trusted vlan - based on compliance 2. In-Band Real IP Gateway - is the gateway 3. Out-of-band virtual gateway (same is 1 - except traffic
dot1x system-auth-control - aaa new-model - aaa authentication dot1x default group radius - radius serve host 10.1.1.2 auth-port 1812 acct port 1813 key <key>

41. IAPP roaming protocol
WLC sends a roam-request to a client when it can better serve that client on a different AP. Client can accept or ignore. CCXv4+
Inter Access Point Protocol uses UDP between aps to exchange information about new aps (announce) in the area and handoffs that have occurred when client roams
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
1. LEAP 2. EAP-FAST

42. Enhanced Neighbor list
1. disassociation 2. deauthentication 3.QoS (WMM)
Security --> Advanced --> CIDS --> Sensors
assigning multiple vlans to single wlan - and users are dynamically mapped to one of the vlans in round-robin
is provided to clients as they associate - including neighbor ap info like channel - rssi etc.

43. Steps to posture assesment
uses certificates
300ms
1. client begins in Quarenteen vlan & NAA sends posture assesment to NAS 2. assesment is verified against policies in NAM 3. If in compliance - client is moved to access vlan. If not - NAS sends remediation info to client 4 NAA guides user through re
checking allow aaa over-ride in the wlan-->advanced.

44. 802.11R
1. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself
1. on NAS create an oob profile for the WLC 2. Create a new device in NAM - specifying the WLC mgmt ip 3. device mgmnt-->NAS & add the NAS ip as an oob virt. gateway 4. still on nams nas config page - enter the nas trusted int. ip & untrusted int vla
specifies fast bss transitions by allowing negotiations and requests for wireless resources to occur simultaneously. Does this by allowing for part of the key to be cached (server key) among the network - so full 802.1x auth. isnt required
1. udp 16666 for control traffic 2. IP Protocol 97 (EoIP) for client data traffic

45. Directed Roam Request
1. client -> authenticator: eapol_start 2. authenticator -> client: eap request/identity 3. client -> authenticator: eap response/identity 4. authenticator -> aaa: radius access request 5. aaa -> client: eap-tls handshake 6.aaa -> authenticator: radi
WLC sends a roam-request to a client when it can better serve that client on a different AP. Client can accept or ignore. CCXv4+
It handles .1x & NAC auth. with Single Sign on. WLC forwards RADIUS accounting messages (of EAPOL Success) to the NAC upon login - authing the client to nac - & then it goes through posturing
1. disassociation 2. deauthentication 3.QoS (WMM)

46. Steps to setting up out-of-band virtual gateway setup on the NAS & NAM
802.11w
1. Scanning - for other aps in the area 2. exchanging 802.11 auth messages (first from client then from ap) w/ the target ap 3. exchanging re-association messages with target ap 4. dot1x master key (PMK) negotiation 5. key derivation - 4way handshake
1. on NAS create an oob profile for the WLC 2. Create a new device in NAM - specifying the WLC mgmt ip 3. device mgmnt-->NAS & add the NAS ip as an oob virt. gateway 4. still on nams nas config page - enter the nas trusted int. ip & untrusted int vla
1. CBC-DES 2. CFB-AES-128

47. Encryption types used by SNMPv3
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC
1. Interfac Configuration --> RADIUS (IETF) --> check 64 (Tunnel Type) - 65 (Tunnel Medium Type) - 81 (Tunnel Private-group-id) 2. Navigate to Group Setup and enable the checkboxes for the previous attributes - where 64=VLAN - 65=802 - 81=<Vlan_tag>
switchport mode access - dot1x pae authenticator - dot1x port-control auto
1. CBC-DES 2. CFB-AES-128

48. Methods for authenticating to NAC
802.11w
WLCs create a deriviative of the PMK - called Opportunistic Key Caching (OPC) for fast-roaming among HREAPs in the same HREAP group.
1. config mobility list to support anchor & foreign wlcs (using different mob. groups on ea. to keep auth. seperate between anchor & foreigns) 2. Map the guest wlan on foreign wlc to either mgmt int. or fake dynamic int. (ie dynamic int tied to a vla
1. Captive Portal 2. NAA (agent installed on windows); auth twice (1 to radius 2 to nac) 3. NAA w/ SSO - user authss once. & wlc auths to nac on their behalf.

49. How to set up tacacs roles in ACS for WLC authorization
802.11w
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
checking allow aaa over-ride in the wlan-->advanced.
Inter Access Point Protocol uses UDP between aps to exchange information about new aps (announce) in the area and handoffs that have occurred when client roams

50. What is the caveat to having redundant anchor controllers
clients are load ballanced between them - this can not be configured otherwise.
WLCs create a deriviative of the PMK - called Opportunistic Key Caching (OPC) for fast-roaming among HREAPs in the same HREAP group.
1. Off (default) - moves down list and uses next server indefinately. 2. Passive -- Upon failure - server is marked as inactive for (300 seconds) then is put back in list and tried again (if its highest priority). 3. Active -- Actively probes failed
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network

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CCNP Wireless Security

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