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CCNP Wireless Security

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Answer 50 questions in 15 minutes.
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1. What are virtual domains used for in WCS
Proactive Key Caching (PKC) or CCKM
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. 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
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs

2. How is IBN implemented on a WLAN
assigning multiple vlans to single wlan - and users are dynamically mapped to one of the vlans in round-robin
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
DTLS (Datagram Transport Layer Security)
checking allow aaa over-ride in the wlan-->advanced.

3. Whats in CCXv4?
DTLS (Datagram Transport Layer Security)
uses certificates
1. RSSI 2. SNR 3. Load-Ballancing
peap-mschapv2 - eap-tls - mfp-v1 - nac

4. How does the Nac Appliance Agent (NAA) work cohesively with 802.1x
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
1. RSSI 2. SNR 3. Load-Ballancing
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. 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

5. Authentication types used by SNMPv3
is provided to clients as they associate - including neighbor ap info like channel - rssi etc.
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
1. HMAC-MD5 2. HMAC-SHA

6. What kind of local 802.1x auth. does HREAP support
mititgate non-802.11 attacks
1. LEAP 2. EAP-FAST
clients are load ballanced between them - this can not be configured otherwise.
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

7. 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
DTLS (Datagram Transport Layer Security)
100 local accounts max
1. HMAC-MD5 2. HMAC-SHA

8. What is Ciscos gold confidence level deployment of wIPS aps in a walled environment
1 AP per 15 -000 sq. feet.
no
1. LEAP 2. EAP-FAST
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML

9. Steps to roaming in 802.1R
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
uses certificates
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network
same as steps to roaming in non-802.1R except: skips PMK negotiation & piggybacks PTK & QoS with the 802.11 authentication & association messages

10. How is IBN-VLAN Selection implemted in ACS
a mobility list can contain multiple mobility groups
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.
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. 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>

11. What is HREAP Local Auth limitation
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
100 local accounts max
802.11i - 802.11r - 802.11w & 802.11n
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC

12. How does infrastructure MFP work
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. udp 16666 for control traffic 2. IP Protocol 97 (EoIP) for client data traffic
HTTPS
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.

13. What does Fast Secure Roaming use re: Keying
1812 - Authentication 1813 - Authorization
1. HMAC-MD5 2. HMAC-SHA
Proactive Key Caching (PKC) or CCKM
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML

14. What is Conditional Web Redirect
after .1x authentication user is forwarded to a splash page. This is done via RADIUS attribute
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
used with PEAP for user/password authentication
MFP-1 protects infrastructure from management frame attacks (ie aps only). MFP-2 Protects both infrastructure & clients

15. What triggers can initiate a WLC to request a client to roam
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.
MFP
1. application type 2. security capabilities 3. QoS policy
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

16. Briefly describe eap-tls
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
Asymetric (public & Private key-pair)
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)
uses certificates

17. Protocols used in wIPS
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML
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
1. CBC-DES 2. CFB-AES-128
no

18. What is 802.11w?
1. CBC-DES 2. CFB-AES-128
MFP
Proactive Key Caching (PKC) or CCKM
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.

19. Steps to configure wlcs for guest wlan
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML
AES-Key Wrap
UDP 5246 & 5247
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

20. How fast is fast secure roaming
WLCs create a deriviative of the PMK - called Opportunistic Key Caching (OPC) for fast-roaming among HREAPs in the same HREAP group.
-150ms
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes
1. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself

21. What are the 4 main components of NGS re: guests
1. Guest User 2. Sponsor 3. Network Enforcement Device (ie wlc) 4. NGS Server itself
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. 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

22. AAA override
802.11i - 802.11r - 802.11w & 802.11n
enables Identity Based Netowrking (IBN) where wlan settings are changed per-user (qos - vlan - acls - or timeouts)
1. HMAC-MD5 2. HMAC-SHA
Does not require re-authentication when a client roams - in an 802.1x/WPA2 environment

23. IAPP roaming protocol
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
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
WLCs create a deriviative of the PMK - called Opportunistic Key Caching (OPC) for fast-roaming among HREAPs in the same HREAP group.
when you want some wlcs to be part of the same mobility group - but not others.

24. Client Roaming Reasons
EAP-FAST with anonymous pac provisioning
802.11w
1. RSSI 2. SNR 3. Load-Ballancing
1. HMAC-MD5 2. HMAC-SHA

25. Main elements of a NAC deployment
1. udp 16666 for control traffic 2. IP Protocol 97 (EoIP) for client data traffic
EAP-FAST with anonymous pac provisioning
AES-Key Wrap
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 part of an 802.11 Beacon contains the security mechanisms in use
300ms
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network
Sends RADIUS packets from a dynamic interface instead of the WLC Mgmt interface address
MFP-1 protects infrastructure from management frame attacks (ie aps only). MFP-2 Protects both infrastructure & clients

27. When will a WLC use a Local EAP profile?
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. 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
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. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC

28. How to add IPS TLS info to WLC
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
Security --> Advanced --> CIDS --> Sensors
Nac Guest Server - used for provisioning guest accts - detailed usage reporting - delivery of creds via emai/sms -
a mobility list can contain multiple mobility groups

29. How is IBN-QoS
Controll is (mgmnt) not data. To encrypt data: check data encryption under advanced tab of ap config
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>
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

30. Why add an IPS if WLCs already detect attacks.
HTTPS
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs
WLC can detect 802.11 attacks - but not other attacks from valid wireless clients.
Clients download a key for their wlan - after auth - so they can understand that IE in the mgmt frame

31. Enhanced Neighbor list
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>
is provided to clients as they associate - including neighbor ap info like channel - rssi etc.
mfp-v2
EAP-FAST with anonymous pac provisioning

32. How long before an HREAP goes into disconnected/standalone mode
300ms
1. HMAC-MD5 2. HMAC-SHA
US: 1. HIPAA 2. GLBA 3. FFIEC 4. SOX 5. FIPS 6. NIAP Canada: 1. PIPEDA Japan: 1. JPIPA
Sends the PMK to all WLCs that the client can roam to.

33. Encryption types used by SNMPv3
used with PEAP for user/password authentication
RSN Tag. Auth Key mgmt will show PSK - or WPA (for 802.1x) Stands for Robust Security Network
1. CBC-DES 2. CFB-AES-128
a mobility list can contain multiple mobility groups

34. Difference between mobility list and mobility group
1812 - Authentication 1813 - Authorization
a mobility list can contain multiple mobility groups
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. 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.

35. Enhanced Neighbor list - E2E
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. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
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.
Allows intel clients to request a neighbor list at will.

36. What does IBN allow you to assign
WLC can detect 802.11 attacks - but not other attacks from valid wireless clients.
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. disassociation 2. deauthentication 3.QoS (WMM)
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes

37. Steps to setting up out-of-band virtual gateway setup on the NAS & NAM
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
UDP 5246 & 5247
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML

38. Encryption algorithm used by Certificates
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
Asymetric (public & Private key-pair)
a mobility list can contain multiple mobility groups
uses certificates

39. 3 categories of segmented traffic
1. application type 2. security capabilities 3. QoS policy
HTTPS
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)
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)

40. Ports to open on fw to allow foreign to anchor controller tunnel to be built
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
mititgate non-802.11 attacks
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. udp 16666 for control traffic 2. IP Protocol 97 (EoIP) for client data traffic

41. Describe AP Assisted Roaming
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. 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
a mobility list can contain multiple mobility groups
based on auth. group -1. vlan 2. qos 3. acl 4. tunnel attributes

42. What kind of mgmt frames does client mfp protect
1. v2 - LEAP 2. v3 - EAP-FAST 3. v4 - PEAP & EAP-TLS
1. disassociation 2. deauthentication 3.QoS (WMM)
1. application type 2. security capabilities 3. QoS policy
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

43. Peap fast reconnect
MFP-1 protects infrastructure from management frame attacks (ie aps only). MFP-2 Protects both infrastructure & clients
after authentication - the client & radius server cache session keys for a configurable amount of time
mping = tests intercontroller control traffic. eping = tests intercontroller data traffic (EoIP)
PKI

44. What is NGS & whats it used for
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)
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
same as steps to roaming in non-802.1R except: skips PMK negotiation & piggybacks PTK & QoS with the 802.11 authentication & association messages

45. What is the WLAN-->Advanced--> DIagnostic Channel used for
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. 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
after .1x authentication user is forwarded to a splash page. This is done via RADIUS attribute
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

46. How is OEAP encrypted
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
mititgate non-802.11 attacks
1 AP per 15 -000 sq. feet.

47. Whats included in 802.11-2012
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.
802.11i - 802.11r - 802.11w & 802.11n
grouping WLCs or map areas - so Lobby ambassadors can create guest accounts only on certain wlcs
what must you ensure -1.Exportable 2.Server Auth Cert 3.Store cert in local cert store

48. Steps to posture assesment
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
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>
300ms
1. CAPWAP 2. NMSP (network mobility services) 3. SNMP 4. SOAP/XML

49. How does CCKM simplify PMK Caching
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
checking allow aaa over-ride in the wlan-->advanced.
Sends RADIUS packets from a dynamic interface instead of the WLC Mgmt interface address
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.

50. What must be configured for SSO authentication to work
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
1. WLC must be defined as a VPN Conentrator - in the NAC config. 2. WLC must be configd to send RADIUS acct. to NAC
Check Shell(exec) then define roles as role1=MANAGEMENT role2=WLAN role3...etc
AES-Key Wrap

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CCNP Wireless Security

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