CCNA Security v2.0 Skills Assessment – B (Answer Key)

CCNA Security v2.0 Skills Assessment – B

Instructor Note: Red font color or gray highlights indicate text that appears in the instructor copy only.

Topology

CCNA Security v2.0 Skills Assessment - B (Answer Key) 2

Assessment Objectives

  • Part 1: Configure PCs and Verify Network Connectivity (5 points, 5 minutes)

Note: Basic configuration is completed by the instructor in preparation for the exam.

  • Part 2: Configure Secure Router Administrative Access (17 points, 15 minutes)
  • Part 3: Configure a Zone-Based Policy Firewall (14 points, 10 minutes)
  • Part 4: Secure Layer 2 Switches (22 points, 20 minutes)
  • Part 5: Configure ASA Basic Management and Firewall Settings (18 points, 15 minutes)
  • Part 6: Configure a Site-To-Site IPsec VPN (28 points, 25 minutes)

Scenario

This Skills Assessment (SA) is the final practical exam of student training for the CCNA Security course. The exam is divided into six parts. The parts should be completed sequentially and signed off by your instructor before moving on to the next part. In Part 1 you will verify that the basic device settings have been preconfigured by the instructor. In Part 2, you will secure a network router using the command-line interface (CLI) to configure various IOS features including AAA and SSH. In Part 3, you will configure zone-based policy firewall (ZPF) on an integrated service router (ISR) using the CLI. In Part 4, you will configure and secure Layer 2 switches using the CLI. In Part 5, you will configure the ASA management and firewall settings using the CLI. In Part 6, you will configure a site-to-site IPsec VPN between R3 and the ASA using the CLI and ASDM.

Instructor Note: The routers used in this SA are Cisco 1941 ISRs with Cisco IOS Release 15.4(3)M2 (universalk9 image). Other routers and Cisco IOS versions can be used. Depending on the model and Cisco IOS version, the commands available and output produced might vary from what is shown in this SA. Refer to the Router Interface Summary table at the end of this SA for the correct interface identifiers.

Instructor Note: Sample scoring and estimated times for each exam are provided. These can be adjusted by the instructor as necessary to suit the testing environment. Total points for the exam are 100 and total time is estimated at 90 minutes. The instructor may elect to deduct points if excessive time is taken for a part of the assessment.

Required Resources

  • 3 Routers (Cisco 1941 with Cisco IOS Release 15.4(3)M2 image with a Security Technology package license or comparable)
  • 3 Switches (Cisco 2960 with Cisco IOS Release 15.0(2) lanbasek9 image or comparable)
  • 1 ASA 5506 (OS version 9.8(1) and ASDM version 7.8(1) and Base license or comparable)
  • 3 PCs (Windows 7 or Windows 8.1, with SSH Client software installed)
  • Console cable to configure the Cisco IOS devices via the console ports
  • Ethernet and Serial cables as shown in the topology

Instructor Notes:

Router Resource Requirements:

Note: The following requirements are critical to successful completion of this SA.

Instructor Note: In the interest of time, the instructor should pre-configure the basic device settings. Basic configurations are provided below for R1 and R3.

R1 Startup Configuration

hostname R1
no ip domain lookup 
interface GigabitEthernet0/0
 ip address 209.165.200.225 255.255.255.248
 no shutdown
interface Serial0/0/1
 ip address 209.165.200.233 255.255.255.252
 no shutdown
ip route 172.30.3.0 255.255.255.0 209.165.200.234
ntp authentication-key 1 md5 NTPpassword 
ntp trusted-key 1
ntp authenticate 
ntp master 3
end

R3 Startup Configuration

hostname R3
no ip domain lookup 
interface G0/1
 ip address 172.30.3.1 255.255.255.0
 no shut 
int S0/0/0
 ip address 209.165.200.234 255.255.255.252
 no shutdown
ip route 0.0.0.0 0.0.0.0 209.165.200.233
end

S1 Startup Configuration

hostname S1
no ip domain lookup
spanning-tree vlan 1 root primary 
interface range f0/3-5, f0/7-24, g0/1-2
shutdown 
end

S2 Startup Configuration

hostname S2
no ip domain lookup
spanning-tree vlan 1 root secondary 
end

PC-A

IP Address: 192.168.10.10
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.10.1

PC-B

IP Address: 192.168.10.11
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.10.1

PC-C

IP Address: 172.30.3.3
Subnet Mask: 255.255.255.0
Default Gateway: 172.30.3.1

Intructions

Part 1: Configure PCs and Verify Network Connectivity

Total points: 5

Time: 5 minutes

In the interest of time, your instructor has pre-configured basic settings on R1 and R3. You must configure the static IP address information for the PC hosts using the addressing in the topology. You will then verify connectivity.

Configuration Task Specification Points
Configure Static IP Addressing on PC-A, PC- B, and PC-C See Topology for specific settings. 3
Ping the G0/1 interface on R3 from PC-C. See Topology for specific settings. 1/2
Ping the S0/0/1 interface on R1 from R3. See Topology for specific settings. 1/2
Ping interface G0/0 on R1 from PC-C. See Topology for specific settings. 1

Instructor Sign-Off Part 1: ___________

Points: __________ of 5

Note: Do not proceed to Part 2 until your instructor has signed off on Part 1.

Part 2: Configure Secure Router Administrative Access

Total points: 17

Time: 15 minutes

In Part 2, you will secure administrative access on router R3 using the CLI. Configuration tasks include the following:

Configuration Item or Task Specification Points
Set minimum password length. Minimum Length: 10 characters 1
Assign and encrypt a privileged EXEC password. Password: cisco12345
Encryption type: 9 (scrypt)
1
Add a user in the local database for administrator access Username: Admin01
Privilege level: 15
Encryption type: 9 (scrypt)
Password: admin01pass
1
Configure MOTD banner. Unauthorized Access is Prohibited! 1/2
Disable HTTP server services. 1/2
Configure SSH. Domain name: ccnassecurity.com
RSA Keys size: 1024
Version: 2
Timeout: 90 seconds
Authentication retries: 2
4
Configure VTY lines to allow SSH access. Allow only SSH access. 1
Configure AAA authentication and authorization settings. Enable AAA
Use local database as default setting.
2
Configure NTP. Authentication Key: NTPpassword
Encryption: MD5
Key: 1
NTP Server: 209.165.200.233
Configure for periodic calendar updates.
4
Configure syslog. Enable timestamp service to log the date and time in milliseconds.
Send syslog messages to: 172.30.3.3
Set message logging severity level: Warnings
2

 

Configuration Item or Task Configuration Commands Verification Commands
Set minimum password length. security passwords min-length 10 show run | inc passwords
Assign and encrypt a privileged EXEC password. enable algorithm-type scrypt secret cisco12345 show run | inc enable
Verify encryption type 9.
Add a user in the local database for administrator access. username Admin01 privilege 15 algorithm-type scrypt secret admin01pass show run | include username
Verify Username, Privilege level, and encryption type. The password can be verified.
Configure MOTD banner. banner motd $Unauthorized Access is Prohibited!$ show run | inc banner
Disable HTTP server services. no ip http server show run | inc http
Configure SSH. ip domain-name ccnasecurity.com
crypto key generate rsa general-keys modulus 1024
ip ssh version 2
ip ssh time-out 90
ip ssh authentication-retries 2
show ip ssh
Configure VTY lines to allow SSH access. line vty 0 4
transport input ssh
exit
show run | sec vty
Configure AAA authentication and authorization settings. aaa new-model
aaa authentication login default local
aaa authorization exec default local
show run | inc aaa
Configure NTP. ntp authentication-key 1 md5 NTPpassword
ntp authenticate
ntp server 209.165.200.233
ntp update-calendar
show ntp associations
show run | sec ntp
Configure syslog. service timestamps log datetime msec
logging 172.30.3.3
logging trap warnings
show run | sec logging
show logging

Note: Before proceeding to Part 3, ask your instructor to verify R3’s configuration and functionality.

Instructor Sign-Off Part 2: ___________

Points: _________ of 17

Part 3: Configure a Zone-Based Policy Firewall

Total points: 14

Time: 10 minutes

In Part 3, you will configure a zone-based policy firewall on R3 using the CLI. Configuration tasks include the following:

Configuration Item or Task Specification Points
Create security zone names. Inside zone name: INSIDE
Outside zone name: INTERNET
2
Create an inspect class map. Class map name: INSIDE_PROTOCOLS
Inspection type: match-any
Protocols allowed: tcp, udp, icmp
3
Create an inspect policy map. Policy map name: INSIDE_TO_INTERNET
Bind the class map to the policy map.
Matched packets should be inspected.
3
Create a zone pair. Zone pair name: IN_TO_OUT_ZONE
Source zone: INSIDE
Destination zone: INTERNET
2
Apply the policy map to the zone pair. Zone pair name: IN_TO_OUT_ZONE
Policy map name: INSIDE_TO_INTERNET
2
Assign interfaces to the proper security zones. Interface G0/1: INSIDE
Interface S0/0/0: INTERNET
2

 

Configuration Item or Task Configuration Commands Verification Commands
Create security zone names. zone security INSIDE
zone security INTERNET
show run | section zone security
Create an inspect class map. class-map type inspect match-any INSIDE_PROTOCOLS
match protocol tcp
match protocol udp
match protocol icmp
show class-map type inspect
Create an inspect policy map. policy-map type inspect INSIDE_TO_INTERNET
class type inspect INSIDE_PROTOCOLS
inspect
show policy-map type inspect
Create a zone pair. zone-pair security IN_TO_OUT_ZONE source INSIDE destination INTERNET show zone-pair security
Apply the policy map to the zone pair. zone-pair security IN_TO_OUT_ZONE
service-policy type inspect INSIDE_TO_INTERNET
show zone-pair security
Assign interfaces to the proper security zones. interface g0/1
zone-member security INSIDE
interface s0/0/0
zone-member security INTERNET
show zone security

Troubleshoot as necessary to correct any issues discovered.

Note: Before proceeding to Part 4, ask your instructor to verify your ZPF configuration and functionality.

Instructor Sign-Off Part 2: _______

Points: _______ of 14

Part 4: Secure Layer 2 Switches

Total points: 22

Time: 20 minutes

Note: Not all security features in this part of the exam will be configured on all switches. However, in a production network, all security feature will be configured on all switches. In the interest of time, the security features are configured on just S2, except where noted.

In Part 4, you will configure security settings on the indicated switch using the CLI. Configuration tasks include the following:

Configuration Item or Task Specification Points
Assign and encrypt a privileged EXEC password. Switch: S2
Password: cisco12345.
Encryption type: 9 (scrypt)
1/2
Add a user in the local database for administrator access Switch: S2
Username: Admin01
Privilege level: 15
Encryption type: 9 (scrypt)
Password: admin01pass
1
Configure MOTD banner. Switch: S2
Banner: Unauthorized Access is Prohibited!
1/2
Disable HTTP and HTTP secure server. Switch: S2 1
Configure SSH. Switch: S2
Domain name: ccnassecurity.com
RSA Keys size: 1024
Version: 2
Timeout: 90 seconds
Authentication retries: 2
2
Configure VTY lines to allow SSH access. Switch: S2
Allow SSH access only.
1/2
Configure AAA authentication and authorization settings. Switch: S2
Enable AAA
Use local database as default setting
2
Create VLAN list. Switches: S1 & S2
VLAN: 2, Name: NewNative
VLAN: 10, Name: LAN
VLAN: 99, Name: Blackhole
1/2
Configure trunk ports. Switches: S1 & S2
Interfaces: F0/1, F0/2
Native VLAN: 2
Prevent DTP.
2
Disable trunking. Switch: S2
Ports: F0/18, F0/24
VLAN assignment: 10
2
Enable PortFast and BPDU guard. Switch: S2
Ports: F0/18, F0/24
2
Configure basic port security. Switch: S2
Port: F0/18
Maximum limit: 1
Remember MAC Address
Violation Action: Shutdown
3
Disable unused ports on S2, and assign ports to VLAN 99. Switch: S2
Ports: F0/3-17, F0/19-23, G0/1-2
1
Configure Loop guard. Switch: S2
Loop guard: Default
1
Configure DHCP snooping. Enable DHCP Snooping globally
Enable DHCP for VLAN: 10
DHCP trusted interface: F0/24
3

NETLAB+ Note: Use a Maximum limit of 2 when configuring basic port security. Otherwise, the hidden Control Switch will cause a violation to occur and the port will be shutdown.

Configuration Item or Task Configuration Commands Verification Commands
Assign and encrypt a privileged EXEC password.
(Switch: S2 only)
enable algorithm-type scrypt secret cisco12345 show run | inc enable
Verify encryption type 9.
Add a user in the local database for administrator access.
(Switch: S2 only)
username Admin01 privilege 15 algorithm-type scrypt secret admin01pass show run | include
username
Verify username, privilege level, and encryption type.
The password can be verified.
Configure MOTD banner.
(Switch: S2 only)
banner motd $Unauthorized Access is Prohibited!$ show run | inc banner
Disable HTTP and HTTP secure server.
(Switch: S2 only)
no ip http server
no ip http secure-server
show run | inc http
Configure SSH.
(Switch: S2 only)
ip domain-name ccnasecurity.com
crypto key generate rsa general-keys modulus 1024
ip ssh version 2
ip ssh time-out 90
ip ssh authentication-retries 2
show ip ssh
Configure VTY lines to allow SSH access.
(Switch: S2 only)
line vty 0 15
transport input ssh
exit
show run | sec vty
Configure AAA authentication and authorization settings.
(Switch: S2 only)
aaa new-model
aaa authentication login default local
aaa authorization exec default local
show run | inc aaa
Create VLAN list.
(Switch: S1 & S2)
vlan 2
name NewNative
vlan 10
name LAN
vlan 99
name Blackhole
exit
show vlan
Configure trunk ports.
(Switch: S1 & S2)
interface range f0/1-2
switchport mode trunk
switchport trunk native vlan 2
switchport nonegotiate
no shutdown
show run | beg interface
Disable trunking.
(Switch: S2 only)
interface ran f0/18, f0/24
switchport mode access
switchport access vlan 10
show run interface f0/18
show run interface f0/24
Enable PortFast and BPDU guard.
(Switch: S2 only)
interface ran f0/18, f0/24
spanning-tree portfast
spanning-tree bpduguard enable
show run interface f0/18
show run interface f0/24
Configure basic port security.
(Switch: S2 only)
interface f0/18
switchport port-security
switchport port-security maximum 1
switchport port-security mac-address sticky
switchport port-security violation shutdown
show port-security interface fa0/18
Disable unused ports on S2, and assign ports to VLAN 99.
(Switch: S2 only)
interface range f0/3-17, f0/19-23, g0/1-2
switchport mode access
switchport access vlan 99
shutdown
show ip interface brief
(Determine whether interfaces are administratively down.)
Configure Loop guard. (Switch: S2 only) spanning-tree loopguard default show spanning-tree summary
(Determine whether Loopguard Default is enabled.)
Configure DHCP snooping.
(Switch: S2 only)
ip dhcp snooping
ip dhcp snooping vlan 10
int f0/24
ip dhcp snooping trust
end
show ip dhcp snooping

Troubleshoot as necessary to correct any issues discovered.

Note: Before proceeding to Part 5, ask your instructor to verify your switch configuration and functionality.

Instructor Sign-Off Part 4: __________
Points: _______ of 22

Part 5: Configure ASA Basic Management and Firewall Settings

Total points: 18

Time: 15 minutes

Note: By default, the privileged EXEC password is blank. Press Enter at the password prompt.

In Part 5, you will configure the ASA’s basic setting and firewall using the CLI. Configuration tasks include the following:

Configuration Item or Task Specification Points
Configure the ASA hostname. Name: CCNAS-ASA 1/2
Configure the domain name. Domain Name: ccnasecurity.com 1/2
Configure the privileged EXEC password. Password: cisco12345 1/2
Add a user to the local database for administrator console access. User: Admin01
Password: admin01pass
1/2
Configure AAA to use the local database for SSH user authentication for console access. 1
Configure Interface G1/1 GigabitEthernet 1/1
Name: outside
IP address: 209.165.200.226
Subnet Mask: 255.255.255.248
Security Level: 0
3
Configure Interface G1/2 GigabitEthernet 1/2
Name: inside
IP address: 192.168.10.1
Subnet Mask: 255.255.255.0
Security Level: 100
4
Generate an RSA key pair to support the SSH connections. Key: RSA
Modulus size: 1024
1
Configure ASA to accept SSH connections from hosts on the inside LAN. Inside Network: 192.168.10.0/24
Timeout: 10 minutes
Version: 2
1
Configure the default route. Default route IP address: 209.165.200.225 1
Configure ASDM access to the ASA. Enable HTTPS server services. Enable HTTPS on the inside network. 2
Create a network object to identify internal addresses for PAT. Bind interfaces dynamically by using the interface address as the mapped IP. Object name: INSIDE-NET
Subnet: 192.168.10.0/24
Interfaces: inside, outside
2
Modify the default global policy to allow returning ICMP traffic through the firewall. Policy-map: global_policy
Class: inspection_default
Inspect: icmp
1

 

Configuration Item or Task Configuration Commands Verification Commands
Configure the ASA hostname. hostname CCNAS-ASA (Look at command prompt to verify CCNAS-ASA name.)
Configure the domain name. domain-name ccnasecurity.com show run domain
Configure the privileged EXEC password. enable password cisco12345 show run enable
Add a user to the local database for administrator console access. username Admin01 password admin01pass show run username
Configure AAA to use the local database for SSH user authentication and for console access. aaa authentication ssh console LOCAL show run aaa
Configure Interface Gi1/1 interface Gi1/1
nameif outside
ip add 209.165.200.226 255.255.255.248
security-level 0
no shutdown
show run interface gi1/2
Configure Interface Gi1/2 interface Gi1/2
nameif inside
ip add 192.168.10.1 255.255.255.0
security-level 100
no shutdown
show run interface gi1/1
Generate an RSA key pair to support the SSH connections. crypto key generate rsa modulus 1024 show crypto key mypubkey rsa
Configure ASA to accept SSH connections from hosts on the inside LAN. ssh 192.168.10.0 255.255.255.0 inside
ssh timeout 10
ssh version 2
show ssh
Configure the default route. route outside 0.0.0.0 0.0.0.0 209.165.200.225 show route(Look for quad-zero static route.)
Configure ASDM access to the ASA. http server enable
http 192.168.10.0 255.255.255.0 inside
show run http
Create a network object to identify internal addresses for PAT. Bind the interfaces dynamically by using the interface address as the mapped IP. object network INSIDE-NET
subnet 192.168.10.0 255.255.255.0
nat (inside,outside) dynamic interface
show nat
show run object
Modify the default global policy to allow returning ICMP traffic through the firewall. policy-map global_policy
class inspection_default
inspect icmp
show run policy-map

Troubleshoot as necessary to correct any issues discovered.

Note: Before proceeding to Part 6, ask your instructor to verify your ASA configuration and functionality.

Instructor Sign-Off Part 5: _____

Points: _____ of 18

Part 6: Configure a Site-to-Site VPN

Total points: 28

Time: 25 minutes

In Part 6, you will configure a Site-to-Site IPsec VPN between R3 and the ASA. You will use the CLI to configure R3 and use ASDM to configure the ASA.

Step 1: Configure Site-to-Site VPN on R3 using CLI.

Configuration parameters include the following:

Configuration Item or Task Specification Points
Enable IKE. Note: ISAKMP is enabled by default. 1
Create an ISAKMP policy. ISAKMP Policy Priority: 1
Authentication type: pre-share
Encryption: 3des
Hash algorithm: sha
Diffie-Hellman Group Key Exchange: 2
5
Configure the pre-shared key. Preshare key: ciscopreshare
Address: 209.165.200.226
2
Configure the IPsec transform set. Tag: TRNSFRM-SET
ESP transform: ESP_3DES
Hash function: ESP_SHA_HMAC
3
Define interesting traffic. ACL: 101
Source Network: 172.30.3.0 0.0.0.24
Destination Network: 192.168.10.0 0.0.0.24
1
Create a crypto map. Crypto map name: CMAP
Sequence number: 1
Type: ipsec-isakmp
ACL to match: 101
Peer: 209.165.200.226
Transform-set: TRNSFRM-SET
5
Apply crypto map to the interface. Interface: S0/0/0
Crypto map name: CMAP
1

 

Configuration Item or Task Configuration Commands Verification Commands
Enable IKE. crypto isakmp enable show run | include crypto
Create an ISAKMP policy. crypto isakmp policy 1
authentication pre-share
encryption 3des
hash sha
group 2
show crypto isakmp policy
Configure the pre-shared key. crypto isakmp key ciscopreshare address 209.165.200.226 show run | include crypto
Configure the IPsec transform set. crypto ipsec transform-set TRNSFRM-SET esp-3des esp-sha-hmac show run | include crypto
Define interesting traffic. access-list 101 permit ip 172.30.3.0 0.0.0.255
192.168.10.0 0.0.0.255
show run | inc access-list
Create a crypto map. crypto map CMAP 1 ipsec-isakmp
match address 101
set transform-set TRNSFRM-SET
set peer 209.165.200.226
show crypto map
Apply crypto map to interface. interface s0/0/0
crypto map CMAP
show crypto map
show run interface s0/0/0
Step 2: Configure Site-to-Site VPN on ASA using ASDM

Use a browser on PC-B to establish an ASDM session to the ASA. When the session is established, use the Site-to-Site VPN Wizard to configure the ASA for IPsec Site-to-Site VPN. Configuration parameters include the following:

Configuration Item or Task Specification Points
Use a browser on PC-B, connect to the ASA, and run ASDM. Connection: HTTPS
IP Address: 192.168.10.1
Username: Admin01
Password: admin01pass
Note: You will need to accept all security messages and/or add the ASA IP address to the allowed list of IP addresses in Java.
If the “Run ASDM” button via Java is not accessible, access your ASA via https://<ip_address>/admin/public/asdm.jnlp to download the JNLP file and then open the file to continue using ASDM.
2
Use the Site-to-site VPN Wizard to configure the site-to-site VPN settings on the ASA. Peer IP Address: 209.165.200.234
VPN Access Interface: outside
Local Network: inside-network/24
Remote Network: 172.30.3.0/24
Pre-shared Key: ciscopreshare
Exempt ASA side/host network from NAT: Enable, inside
5
Ping PC-B from PC-C. This should generate interesting traffic and start site-to- site VPN. 1/2
Ping PC-C from PC-B. 1/2
Display the ISAKMP and IPsec SAs on R3. show crypto isakmp sa
show crypto ipsec sa
(Look for an active session.)
1
Verify that a site-to-site session has been established using ASDM from PC-B. ASDM Monitoring
VPN tab
Filter by: IPsec Site-to-Site
1

Troubleshoot as necessary to correct any issues discovered.

Instructor Note: Have the student ping PC-B to demonstrate that PC-C has established an SSL VPN connection to the ASA. The student should also be able to use ASDM on PC-B to display the established VPN session.

Instructor Sign-Off Part 6: ________

Points: ______ of 28

Router Interface Summary

Router Interface Summary
Router Model Ethernet Interface #1 Ethernet Interface #2 Serial Interface #1 Serial Interface #2
1800 Fast Ethernet 0/0 (F0/0) Fast Ethernet 0/1 (F0/1) Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
1900 Gigabit Ethernet 0/0 (G0/0) Gigabit Ethernet 0/1 (G0/1) Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
2801 Fast Ethernet 0/0 (F0/0) Fast Ethernet 0/1 (F0/1) Serial 0/1/0 (S0/1/0) Serial 0/1/1 (S0/0/1)
2811 Fast Ethernet 0/0 (F0/0) Fast Ethernet 0/1 (F0/1) Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)
2900 Gigabit Ethernet 0/0 (G0/0) Gigabit Ethernet 0/1 (G0/1) Serial 0/0/0 (S0/0/0) Serial 0/0/1 (S0/0/1)

Note: To find out how the router is configured, look at the interfaces to identify the type of router and how many interfaces the router has. There is no way to effectively list all the combinations of configurations for each router class. This table includes identifiers for the possible combinations of Ethernet and Serial interfaces in the device. The table does not include any other type of interface, even though a specific router may contain one. An example of this might be an ISDN BRI interface. The string in parenthesis is the legal abbreviation that can be used in Cisco IOS commands to represent the interface.

 


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