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CCNP Wireless Security

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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1. What is included in a Pairwise Transient Key (PTK)
Controll is (mgmnt) not data. To encrypt data: check data encryption under advanced tab of ap config
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
checking allow aaa over-ride in the wlan-->advanced.
1. Temporal Key for Unicast 2. Key Confirmation Key (KCK) - used for group handshakes 3. Key Encryption Key (KEK) - for encrypting the group encyrption key used to derive the braodcast/multicast keys.

2. How fast is fast secure roaming
mititgate non-802.11 attacks
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.
-150ms
1. RSSI 2. Duration 3. Client Count 4. No encryption 5. Managed SSID (ie UNLV) 6. SSID

3. What does FIPS-2 require for WLC to RADIUS communications
1. CBC-DES 2. CFB-AES-128
1812 - Authentication 1813 - Authorization
Sends RADIUS packets from a dynamic interface instead of the WLC Mgmt interface address
AES-Key Wrap

4. What protocol to WLCs use to communicate with IPS
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML
HTTPS
1. Temporal Key for Unicast 2. Key Confirmation Key (KCK) - used for group handshakes 3. Key Encryption Key (KEK) - for encrypting the group encyrption key used to derive the braodcast/multicast keys.
PKI

5. Describe AP Assisted Roaming
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
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
1. Min. RSSI 2. Roam Hysterisis - how much higher than current RSSI compared to neighbor ap RSSI before roaming request initiates 3. Scan Threshold - How low the current RSSI must be for the client to start scanning for a better ap 4. Transition Time

6. 3 modes of radius fallback
WLCs create a deriviative of the PMK - called Opportunistic Key Caching (OPC) for fast-roaming among HREAPs in the same HREAP group.
peap-mschapv2 - eap-tls - mfp-v1 - nac
clients are load ballanced between them - this can not be configured otherwise.
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

7. Encryption algorithm used by Certificates
Asymetric (public & Private key-pair)
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
Sends RADIUS packets from a dynamic interface instead of the WLC Mgmt interface address
1. Min. RSSI 2. Roam Hysterisis - how much higher than current RSSI compared to neighbor ap RSSI before roaming request initiates 3. Scan Threshold - How low the current RSSI must be for the client to start scanning for a better ap 4. Transition Time

8. Whats in CCXv4?
peap-mschapv2 - eap-tls - mfp-v1 - nac
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
MFP
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes

9. Eap process/messages
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. 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
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
MFP-1 protects infrastructure from management frame attacks (ie aps only). MFP-2 Protects both infrastructure & clients

10. How is IBN implemented on a WLAN
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+
1. Min. RSSI 2. Roam Hysterisis - how much higher than current RSSI compared to neighbor ap RSSI before roaming request initiates 3. Scan Threshold - How low the current RSSI must be for the client to start scanning for a better ap 4. Transition Time
Sends the PMK to all WLCs that the client can roam to.
checking allow aaa over-ride in the wlan-->advanced.

11. What is Conditional Web Redirect
after .1x authentication user is forwarded to a splash page. This is done via RADIUS attribute
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)
100 local accounts max
after authentication - the client & radius server cache session keys for a configurable amount of time

12. How is the CAPWAP tunnel between AP & WLC encrypted
x509v3 certificate
when you want some wlcs to be part of the same mobility group - but not others.
same as steps to roaming in non-802.1R except: skips PMK negotiation & piggybacks PTK & QoS with the 802.11 authentication & association messages
300ms

13. Steps to posture assesment
300ms
MFP-1 protects infrastructure from management frame attacks (ie aps only). MFP-2 Protects both infrastructure & clients
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
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

14. What must be configured the same for an HREAP not to disconnect clients when failing over (or back) to a WLC
1. VLAN Mapping 2. WLAN Ordering 3. WLAN Configuration
puts the ap and client through tests to isolate connection issues. This disables the wlan while doing this. Can be used to diagnose .1x auth - .11 association etc. if using ccxv5
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
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

15. Encryption types used by SNMPv3
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+
1. RSSI 2. Duration 3. Client Count 4. No encryption 5. Managed SSID (ie UNLV) 6. SSID
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>
1. CBC-DES 2. CFB-AES-128

16. How long before an HREAP goes into disconnected/standalone mode
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
Proactive Key Caching (PKC) or CCKM
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
300ms

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

18. Directed Roam Request
checking allow aaa over-ride in the wlan-->advanced.
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
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)
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+

19. Is data encrypted over a capwap tunnel?
Sends RADIUS packets from a dynamic interface instead of the WLC Mgmt interface address
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
Controll is (mgmnt) not data. To encrypt data: check data encryption under advanced tab of ap config
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

20. Difference between mobility list and mobility group
1. Wireless-->AP Global Config-->enable dot1x w/ user/pass 2. Config the switch port to enable auth. to ACS/RADIUS
a mobility list can contain multiple mobility groups
1. Temporal Key for Unicast 2. Key Confirmation Key (KCK) - used for group handshakes 3. Key Encryption Key (KEK) - for encrypting the group encyrption key used to derive the braodcast/multicast keys.
1 AP per 15 -000 sq. feet.

21. What does IBN allow you to assign
peap-mschapv2 - eap-tls - mfp-v1 - nac
1. VLAN Mapping 2. WLAN Ordering 3. WLAN Configuration
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes
1. Temporal Key for Unicast 2. Key Confirmation Key (KCK) - used for group handshakes 3. Key Encryption Key (KEK) - for encrypting the group encyrption key used to derive the braodcast/multicast keys.

22. Switchport config to enable dot1x on a port
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs
switchport mode access - dot1x pae authenticator - dot1x port-control auto
1. Wireless-->AP Global Config-->enable dot1x w/ user/pass 2. Config the switch port to enable auth. to ACS/RADIUS

23. What CCX version is required for CCKM
HTTPS
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
1. disassociation 2. deauthentication 3.QoS (WMM)
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+

24. Client Roaming Reasons
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.
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. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself
1. RSSI 2. SNR 3. Load-Ballancing

25. What is 802.11w?
uses certificates
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
MFP
-150ms

26. What are mping and eping used for from the wlc cli
1. CBC-DES 2. CFB-AES-128
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
1. HMAC-MD5 2. HMAC-SHA
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)

27. Why is fast secure roaming used
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. Integrated -- wIPS monitor mode aps are part of client-serving infrastructure 2. Overlay -- wIPS aps - WCS & WLCs are totally seperate
Does not require re-authentication when a client roams - in an 802.1x/WPA2 environment
no

28. Things to Enable in ACS (Global Authentication Page) for PEAP support
US: 1. HIPAA 2. GLBA 3. FFIEC 4. SOX 5. FIPS 6. NIAP Canada: 1. PIPEDA Japan: 1. JPIPA
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC
WLC RADIUS server only works if passwords are sent in Clear-text from LDAP.
what must you ensure -1.Exportable 2.Server Auth Cert 3.Store cert in local cert store

29. What is HREAP Local Auth limitation
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML
100 local accounts max
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. Steps to roaming in non802.1R
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
same as steps to roaming in non-802.1R except: skips PMK negotiation & piggybacks PTK & QoS with the 802.11 authentication & association messages
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
-150ms

31. What must be configd on ACS to enable dot1x from switch
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
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)
EAP-FAST with anonymous pac provisioning
x509v3 certificate

32. 6 criteria types for rogue classification
1812 - Authentication 1813 - Authorization
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
802.11i - 802.11r - 802.11w & 802.11n
1. RSSI 2. Duration 3. Client Count 4. No encryption 5. Managed SSID (ie UNLV) 6. SSID

33. What does Proactive Key Caching do
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)
checking allow aaa over-ride in the wlan-->advanced.
Sends the PMK to all WLCs that the client can roam to.
1. Integrated -- wIPS monitor mode aps are part of client-serving infrastructure 2. Overlay -- wIPS aps - WCS & WLCs are totally seperate

34. Enhanced Neighbor list - E2E
WLC RADIUS server only works if passwords are sent in Clear-text from LDAP.
switchport mode access - dot1x pae authenticator - dot1x port-control auto
Proactive Key Caching (PKC) or CCKM
Allows intel clients to request a neighbor list at will.

35. What ports does OEAP use to connect to anchor WLC
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
Asymetric (public & Private key-pair)
UDP 5246 & 5247
802.11i - 802.11r - 802.11w & 802.11n

36. What is the caveat to having redundant anchor controllers
Does not require re-authentication when a client roams - in an 802.1x/WPA2 environment
clients are load ballanced between them - this can not be configured otherwise.
what must you ensure -1.Exportable 2.Server Auth Cert 3.Store cert in local cert store
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes

37. What are virtual domains used for in WCS
1. Temporal Key for Unicast 2. Key Confirmation Key (KCK) - used for group handshakes 3. Key Encryption Key (KEK) - for encrypting the group encyrption key used to derive the braodcast/multicast keys.
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs
1. application type 2. security capabilities 3. QoS policy
802.11i - 802.11r - 802.11w & 802.11n

38. Steps to auth with NAA w/ SSO
WLCs create a deriviative of the PMK - called Opportunistic Key Caching (OPC) for fast-roaming among HREAPs in the same HREAP group.
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
1. CBC-DES 2. CFB-AES-128
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

39. Authentication types used by SNMPv3
puts the ap and client through tests to isolate connection issues. This disables the wlan while doing this. Can be used to diagnose .1x auth - .11 association etc. if using ccxv5
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
1. HMAC-MD5 2. HMAC-SHA
after authentication - the client & radius server cache session keys for a configurable amount of time

40. What kind of mgmt frames does client mfp protect
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
1. RSSI 2. SNR 3. Load-Ballancing
802.11i - 802.11r - 802.11w & 802.11n
1. disassociation 2. deauthentication 3.QoS (WMM)

41. Steps to installing Server Cert into ACS
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
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
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. 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

42. 2 different types of wIPS deployment
1. Allow EAP-MSCHAPv2 2. Allow EAP-GTC 3. Check Posture Validation when doing NAC
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
1. Integrated -- wIPS monitor mode aps are part of client-serving infrastructure 2. Overlay -- wIPS aps - WCS & WLCs are totally seperate
US: 1. HIPAA 2. GLBA 3. FFIEC 4. SOX 5. FIPS 6. NIAP Canada: 1. PIPEDA Japan: 1. JPIPA

43. What is NGS & whats it used for
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. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
Corrospond to top-menu GUI items (wireless - security - monitor etc)

44. Methods for authenticating to NAC
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.
US: 1. HIPAA 2. GLBA 3. FFIEC 4. SOX 5. FIPS 6. NIAP Canada: 1. PIPEDA Japan: 1. JPIPA
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.
1. application type 2. security capabilities 3. QoS policy

45. Will foreign/anchor communication work through PAT?
AES-Key Wrap
802.11w
no
300ms

46. What does a wired IPS do compared to the WLC IDS
no
mititgate non-802.11 attacks
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+
is provided to clients as they associate - including neighbor ap info like channel - rssi etc.

47. What part of an 802.11 Beacon contains the security mechanisms in use
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network
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.
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

48. How does infrastructure MFP work
1 AP per 15 -000 sq. feet.
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.
DTLS (Datagram Transport Layer Security)
1. Integrated -- wIPS monitor mode aps are part of client-serving infrastructure 2. Overlay -- wIPS aps - WCS & WLCs are totally seperate

49. Reason why you can NOT use WLC RADIUS server to auth. against OpenLDAP or Win-2003 (or later)
WLC RADIUS server only works if passwords are sent in Clear-text from LDAP.
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
1. RSSI 2. SNR 3. Load-Ballancing
1. Min. RSSI 2. Roam Hysterisis - how much higher than current RSSI compared to neighbor ap RSSI before roaming request initiates 3. Scan Threshold - How low the current RSSI must be for the client to start scanning for a better ap 4. Transition Time

50. Enhanced Neighbor list
x509v3 certificate
100 local accounts max
is provided to clients as they associate - including neighbor ap info like channel - rssi etc.
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

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CCNP Wireless Security

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