sba ccna security final

CCNA Security PT Practice SBA A few things to keep in mind while completing this activity:

1. Do not use the browser Back button or close or reload any Exam windows during the exam.

2. Do not close Packet Tracer when you are done. It will close automatically. 3. Click the Submit Assessment button to submit your work.

Introduction In this practice Packet Tracer Skills Based Assessment, you will:

• configure basic device hardening and secure network management • configure a CBAC firewall to implement security policies • configure devices to protect against STP attacks and to enable broadcast storm control

• configure port security and disable unused switch ports • configure an IOS IPS • configure a ZPF to implement security policies • configure a site-to-site IPsec VPN

corp

Sw1

branch

Addressing Table

Device Interface IP Address Subnet Mask Gateway DNS server

Internet

S0/0/0 209.165.200.225 255.255.255.252 n/a n/a S0/0/1 192.31.7.1 255.255.255.252 n/a n/a S0/1/0 198.133.219.1 255.255.255.252 n/a n/a Fa0/0 192.135.250.1 255.255.255.0 n/a n/a

CORP

S0/0/0 209.165.200.226 255.255.255.252 n/a n/a Fa0/0 10.1.1.254 255.255.255.0 n/a n/a Fa0/1.10 172.16.10.254 255.255.255.0 n/a n/a Fa0/1.25 172.16.25.254 255.255.255.0 n/a n/a Fa0/1.99 172.16.99.254 255.255.255.0 n/a n/a

Branch S0/0/0 198.133.219.2 255.255.255.252 n/a n/a Fa0/0 198.133.219.62 255.255.255.224 n/a n/a

External S0/0/0 192.31.7.2 255.255.255.252 n/a n/a Fa0/0 192.31.7.62 255.255.255.224 n/a n/a

Public Svr NIC 192.135.250.5 255.255.255.0 192.135.250.1 n/a External Web Svr

NIC 192.31.7.35 255.255.255.224 192.31.7.62 192.135.250.5

External PC NIC 192.31.7.33 255.255.255.224 192.31.7.62 192.135.250.5 NTP/Syslog Svr

NIC 172.16.25.2 255.255.255.0 172.16.25.254 10.1.1.5

DMZ DNS Svr

NIC 10.1.1.5 255.255.255.0 10.1.1.254 192.135.250.5

DMZ Web Svr

NIC 10.1.1.2 255.255.255.0 10.1.1.254 10.1.1.5

PC0 NIC 172.16.10.5 255.255.255.0 172.16.10.254 10.1.1.5 PC1 NIC 172.16.10.10 255.255.255.0 172.16.10.254 10.1.1.5 Net Admin NIC 172.16.25.5 255.255.255.0 172.16.25.254 10.1.1.5 Admin PC NIC 198.133.219.35 255.255.255.224 198.133.219.62 192.135.250.5

Note: Appropriate verification procedures should be taken after each configuration task to ensure that it has been properly implemented.

Step 1: Configure Basic Device Hardening for the CORP Router.

a. Configure the CORP router to only accept passwords with a minimum length of 10 characters.

CORP(config)#security passwords min-length 10

b. Configure an encrypted privileged level password of ciscoclass.

CORP(config)#enable secret ciscoclass

c. Enable password encryption for all clear text passwords in the configuration file.

CORP(config)#service password-encryption

d. Configure the console port and all vty lines with the following requirements:

Note: CORP is already configured with the username CORPADMIN and the secret password ciscoccnas.

?? use the local database for login

?? disconnect after being idle for 20 minutes

CORP(config)#line con 0

CORP(config-line)#login local

CORP(config-line)#exec-timeout 20 0

CORP(config)#line vty 0 4






d. Disable the CDP protocol only on the link to the Internet router.

CORP(config)#interface serial 0/0/0

CORP(config-if)#no cdp enable

Step 2: Configure Secure Network Management for the CORP Router.

a. Enable the CORP router:

?? as an NTP client to the NTP/Syslog server

CORP(config)#ntp server 172.16.25.2 key 0

?? to update the router calendar (hardware clock) from the NTP time source

CORP(config)#ntp update-calendar

?? to timestamp log messages

CORP(config)#service timestamps log datetime msec

?? to send logging messages to the NTP/Syslog server

CORP(config)#logging host 172.16.25.2

b. Configure the CORP router to accept SSH connections. Use the following guidelines:

Note: CORP is already configured with the username SSHAccess and the secret password ciscosshaccess.

?? domain name is theccnas.com

CORP(config)#ip domain-name theccnas.com

?? RSA encryption key pair using a modulus of 1024

CORP(config)#crypto key generate rsa

>>enter>>[1024]

?? SSH version 2, timeout of 90 seconds, and 2 authentication retries

CORP(config)#ip ssh version 2

CORP(config)#ip ssh time-out 90

CORP(config)#ip ssh authentication-retries 2

?? all vty lines accept only SSH connections

CORP(config-line)#line vty 0 4

CORP(config-line)#transport input ssh

CORP(config-line)#line vty 5 15

CORP(config-line)#transport input ssh

c. Configure the CORP router with AAA authentication and verify its functionality:

?? AAA authentication using the local database as the default for console line and vty lines access

CORP(config)#aaa new-model

CORP(config)#aaa authentication login default local

CORP(config)#aaa authorization exec default local

Step 3: Configure Device Hardening for Switch1.

a. Access Switch1 with username CORPADMIN, password ciscoccnas, and the enable secret password of ciscoclass.

b. Enable storm control for broadcasts on FastEthernet 0/24 with a 50 percent rising suppression level.

SW1(config)#interface fastEthernet 0/24

SW1(config-if)#storm-control broadcast level 50

c. Configure Switch1 to protect against STP attacks.

?? Configure PortFast on FastEthernet ports 0/1 to 0/23.

SW1(config)#interface range fastEthernet 0/1-23

SW1(config-if-range)#spanning-tree portfast

?? Enable BPDU guard on FastEthernet ports 0/1 to 0/23.

SW1(config-if-range)#spanning-tree bpduguard enable

e. Configure port security and disable unused ports.

SW1(config-if-range)#switchport mode access

?? Set the maximum number of learned MAC addresses to 2 on FastEthernet ports 0/1 to 0/23. Allow the MAC address to be learned dynamically and to

shutdown the port if a violation occurs.

SW1(config-if-range)#switchport port-security

SW1(config-if-range)#switchport port-security maximum 2

SW1(config-if-range)#switchport port-security violation shutdown

SW1(config-if-range)#switchport port-security mac-address sticky

?? Disable unused ports (Fa0/2-5, Fa0/7-10, Fa0/13-23).


SW1(config-if-range)#shutdown





Step 4: Configure an IOS IPS on the CORP Router.

a. On the CORP router, create a directory in flash named ipsdir.

CORP#mkdir ipsdir [enter]

b. Configure the IPS signature storage location to be flash:ipsdir.

CORP(config)#ip ips config location flash:ipsdir/ retries 1

c. Create an IPS rule named corpips.

CORP(config)#ip ips name corpips

d. Configure the IOS IPS to use the signature categories. Retire the all signature category and unretire the ios_ips basic category.

CORP(config)#ip ips signature-category

CORP(config-ips-category)#category all

CORP(config-ips-category-action)#retired true

CORP(config-ips-category-action)#exit

CORP(config-ips-category)#category ios_ips basic

CORP(config-ips-category-action)#retired false

CORP(config-ips-category-action)#exit

CORP(config-ips-category)#exit

Do you want to accept these changes? [confirm]{enter}

e. Apply the IPS rule to the Fa0/0 interface.

CORP(config)#interface fastEthernet 0/0

CORP(config-if)#ip ips corpips out

f. Modify the ios_ips basic category. Unretire the echo request signature (signature 2004, subsig 0); enable the signature; modify the signature event-action to produce an alert and to deny packets that match the signature.

CORP(config)#ip ips signature-definition

CORP(config-sigdef)#signature 2004 0

CORP(config-sigdef-sig)#status

CORP(config-sigdef-sig-status)#retired false

CORP(config-sigdef-sig-status)#enabled true

CORP(config-sigdef-sig-status)#exit

CORP(config-sigdef-sig)#engine

CORP(config-sigdef-sig-engine)#event-action produce-alert

CORP(config-sigdef-sig-engine)#event-action deny-packet-inline

CORP(config-sigdef-sig-engine)#exit

CORP(config-sigdef-sig)#exit

CORP(config-sigdef)#exit

Do you want to accept these changes? [confirm]{enter}

g. Verify that IPS is working properly. Net Admin in the internal network cannot ping DMZ Web Svr. DMZ Web Svr, however, can ping Net Admin.

Step 5: Configure ACLs and CBAC on the CORP Router to Implement the Security Policy.

a. Create ACL 12 to implement the security policy regarding the access to the vty lines:

?? Only users connecting from Net Admin and Admin PC are allowed access to the vty lines.

CORP(config)#access-list 12 permit host 172.16.25.5

CORP(config)#access-list 12 permit host 198.133.219.35


CORP(config-line)#access-class 12 in


CORP(config-line)#access-class 12 in

b. Create, apply, and verify an extended named ACL (named DMZFIREWALL) to filter incoming traffic to the DMZ.?? The ACL should be created in the order specified in the following guidelines (Please note, the order of ACL statements is significant only because of the scoring need in Packet Tracer.):

1. HTTP traffic is allowed to DMZ Web Svr.

2. DNS traffic (both TCP and UDP) is allowed to DMZ DNS Svr.

3. All traffic from 172.16.25.0/24 is allowed to enter the DMZ.

4. FTP traffic from the Branch administrator workstations in the subnet of 198.133.219.32/27 is allowed to DMZ Web Svr.

[*]command’s by order of execution

CORP(config)#ip access-list extended DMZFIREWALL CORP(config-ext-nacl)# permit tcp any host 10.1.1.2 eq www CORP(config-ext-nacl)# permit tcp any host 10.1.1.5 eq domain CORP(config-ext-nacl)# permit udp any host 10.1.1.5 eq domain CORP(config-ext-nacl)# permit ip 172.16.25.0 0.0.0.255 10.1.1.0 0.0.0.255 CORP(config-ext-nacl)# permit tcp 198.133.219.32 0.0.0.31 host 10.1.1.2 eq ftp

CORP(config-ext-nacl)#exit

CORP(config)#interface FastEthernet0/0

CORP(config-if)# ip access-group DMZFIREWALL out

c. To verify the DMZFIREWALL ACL, complete the following tests:

?? Admin PC in the branch office can access the URL http://www.theccnas.com;

?? Admin PC can open an FTP session to the DMZ Web Svr with the username cisco and the password cisco;

?? Net Admin can open an FTP session to the DMZ Web Svr with the username cisco and the password cisco; and

?? PC1 cannot open an FTP session to the DMZ Web Svr.

d. Create, apply, and verify an extended named ACL (named INCORP) to control access from the Internet into the CORP router.?? The ACL should be created in the order specified in the following guidelines (Please note, the order of ACL statements is significant only because of the scoring need in Packet Tracer.):

1. Allow HTTP traffic to the DMZ Web Svr.

2. Allow DNS traffic (both TCP and UDP) to the DMZ DNS Svr.

3. Allow SSH traffic from the Branch Office administrator workstation to the Serial 0/0/0 interface on the CORP router.

4. Allow IP traffic from the Branch router serial interface into the CORP router serial interface.

5. Allow IP traffic from the Branch Office LAN to the public IP address range

that is assigned to the CORP site (209.165.200.240/28).

CORP(config)#ip access-list extended INCORP CORP(config-ext-nacl)#permit tcp any host 209.165.200.241 eq www CORP(config-ext-nacl)#permit tcp any host 209.165.200.242 eq domain CORP(config-ext-nacl)#permit udp any host 209.165.200.242 eq domain CORP(config-ext-nacl)#permit tcp 198.133.219.32 0.0.0.31 host 209.165.200.226 eq 22 CORP(config-ext-nacl)#permit ip host 198.133.219.2 host 209.165.200.226 CORP(config-ext-nacl)#permit ip 198.133.219.32 0.0.0.31 209.165.200.240 0.0.0.15

CORP(config-ext-nacl)#exit

CORP(config)# interface Serial0/0/0

CORP(config-if)# ip access-group INCORP in

e. To verify the INCORP ACL, complete the following tests:

?? Admin PC in the branch office can access the URL http://www.theccnas.com;

?? Admin PC can establish an SSH connection to the CORP router (209.165.200.226) with the username SSHAccess and password ciscosshaccess; and

?? External PC cannot establish an SSH connection to the CORP router (209.165.200.226).

g. Create and apply a CBAC inspection rule (named INTOCORP) to inspect ICMP, TCP, and UDP traffic between the CORP internal network and any other network.

CORP(config)#ip inspect name INTOCORP icmp CORP(config)#ip inspect name INTOCORP tcp CORP(config)#ip inspect name INTOCORP udp

h. Enable CBAC audit messages to be sent to the syslog server.

CORP(config)#ip inspect audit-trail

CORP(config)#interface Serial0/0/0

CORP(config-if)#ip inspect INTOCORP out

h. Verify the CBAC firewall configuration.

?? PC1 can access the External Web Svr (www.externalone.com).

?? PC1 can establish an SSH connection to the External router with username SSHadmin and password ciscosshpa55.

?? Admin PC in the Branch office can establish an SSH connection to the CORP router with the username SSHAccess and password ciscosshaccess.

Step 6: Configure a Zone-Based Policy Firewall on the Branch Router.

a. Access the Branch router with username CORPADMIN, password ciscoccnas and the enable secret password of ciscoclass.

b. On the Branch router, create the firewall zones.

?? Create an internal zone named BR-IN-ZONE.

Branch(config)#zone security BR-IN-ZONE

exit

?? Create an external zone named BR-OUT-ZONE.

Branch(config)#zone security BR-OUT-ZONE

exit

c. Define a traffic class and access list.

?? Create an ACL (ACL 110) to permit all protocols from the 198.133.219.32/27 network to any destination.

Branch(config)#access-list 110 permit ip 198.133.219.32 0.0.0.31 any

?? Create a class map using the option of class map type inspect with the match-all keyword. Match the ACL 110 and name the class map BR-IN-CLASS-MAP.

Branch(config)#class-map type inspect match-all BR-IN-CLASS-MAP

Branch(config-cmap)#match access-group 110

d. Specify firewall policies.

?? Create a policy map named BR-IN-OUT-PMAP.

?? Use the BR-IN-CLASS-MAP class map.

?? Specify the action of inspect for this policy map.

Branch(config)#policy-map type inspect BR-IN-OUT-PMAP

Branch(config-pmap)#class type inspect BR-IN-CLASS-MAP

Branch(config-pmap-c)#inspect

e. Apply the firewall.

?? Create a pair of zones named IN-OUT-ZPAIR with the source as BR-IN-ZONE and destination as BR-OUT-ZONE.

Branch(config)#zone-pair security IN-OUT-ZPAIR source BR-IN-ZONE destination BR-OUT-ZONE

?? Specify the policy map BR-IN-OUT-PMAP for handling the traffic between the two zones.

Branch(config-sec-zone-pair)#service-policy type inspect BR-IN-OUT-PMAP

?? Assign interfaces to the appropriate security zones.

Branch(config)#interface fastEthernet 0/0

Branch(config-if)#zone-member security BR-IN-ZONE

Branch(config)#interface serial 0/0/0

Branch(config-if)#zone-member security BR-OUT-ZONE

f. Verify the ZPF configuration.

?? The Admin PC in the Branch office can access the URLs http://www.theccnas.com and http://www.externalone.com.

?? The Admin PC in the Branch office can ping the External PC (192.31.7.33).

?? External PC cannot ping the Admin PC in the Branch office (198.133.219.35).

?? The Admin PC in Branch office can establish an SSH connection to the CORP router with the username SSHAccess and password ciscosshaccess. If you get the Corp> prompt, then your configuration is correct.

Step 7: Configure a Site-to-Site IPsec VPN between the CORP router and the Branch Router.

The following tables list the parameters for the ISAKMP Phase 1 Policy and IPsec Phase 2 Policy:??????????????????????????????????????????

ISAKMP Phase 1 Policy Parameters

ISAKMP Phase 2 Policy Parameters

Key Distribution Method

ISAKMP Parameters CORP Router Branch Router

Encryption Algorithm

AES Transform Set Name

VPN-SET VPN-SET

Number of Bits 256 Transform

Set esp-3des esp-sha-hmac

esp-3des esp-sha-hmac

Hash Algorithm SHA-1 Peer Host

Name Branch CORP

Authentication Method

Pre-share Peer IP Address

198.133.219.2 209.165.200.226

Key Exchange DH 2 Encrypted Network

209.165.200.240/28 198.133.219.32/27

IKE SA Lifetime

86400 Crypto Map Name

VPN-MAP VPN-MAP

ISAKMP Key Vpnpass101 SA Establishment

ipsec-isakmp ipsec-isakmp

a. Configure an ACL (ACL 120) on the CORP router to identify the interesting traffic. The interesting traffic is all IP traffic between the two LANs (209.165.200.240/28 and 198.133.219.32/27).

CORP(config)#access-list 120 permit ip 209.165.200.240 0.0.0.15 198.133.219.32 0.0.0.31

Branch(config)#access-list 120 permit ip 198.133.219.32 0.0.0.31 209.165.200.240

0.0.0.15

b. Configure the ISAKMP Phase 1 properties on the CORP router. The crypto ISAKMP policy is 10.?? Refer to the ISAKMP Phase 1 Policy Parameters Table for the specific details needed.

/************************************ ***********config for corp************* ************************************/

CORP(config)#crypto isakmp policy 10

CORP(config-isakmp)#encryption aes 256

CORP(config-isakmp)#authentication pre-share

CORP(config-isakmp)#group 2

CORP(config)#crypto isakmp key Vpnpass101 address 198.133.219.2

/************************************ ***********config for branch************ ************************************/

Branch (config)#crypto isakmp policy 10

Branch (config-isakmp)#encryption aes 256

Branch (config-isakmp)#authentication pre-share

Branch (config-isakmp)#group 2

Branch (config)#crypto isakmp key Vpnpass101 address 209.165.200.226

c. Configure the ISAKMP Phase 2 properties on the CORP router. Refer to the ISAKMP Phase 2 Policy Parameters Table for the specific details needed.

/************************************ ***********config for corp************* ************************************/

CORP(config)#crypto ipsec transform-set VPN-SET esp-3des esp-sha-hmac

CORP(config)#crypto map VPN-MAP 10 ipsec-isakmp

CORP(config-crypto-map)#set peer 198.133.219.2

CORP(config-crypto-map)# set transform-set VPN-SET

CORP(config-crypto-map)# match address 120


Branch(config)#crypto ipsec transform-set VPN-SET esp-3des esp-sha-hmac

Branch (config)#crypto map VPN-MAP 10 ipsec-isakmp Branch (config-crypto-map)#set peer 209.165.200.226 Branch (config-crypto-map)#set transform-set VPN-SET Branch (config-crypto-map)#match address 120

d. Bind the VPN-MAP crypto map to the outgoing interface.

/************************************ ***********config for corp************* ************************************/

CORP(config)#interface Serial0/0/0

CORP(config-if)#crypto map VPN-MAP


Branch(config)#interface Serial0/0/0

Branch(config-if)#crypto map VPN-MAP

e. Configure IPsec parameters on the Branch router using the same parameters as on the CORP router. Note that interesting traffic is defined as the IP traffic from the two LANs.(done before)

f. Save the running-config, then reload both CORP and Branch routers.

/************************************ ***********config for corp************* ************************************/

CORP#copy running-config startup-config

[enter]

CORP#reload


Branch#copy running-config startup-config

[enter]

Branch#reload

g. Verify the VPN configuration by conducting an FTP session with the username cisco and the password cisco from the Admin PC to the DMZ Web Svr. On the Branch router, check that the packets are encrypted. To exit the FTP session, type quit.

sba ccna security final

Documents

specific details needed

fastethernet ports 0 1

dmz web svr

member security br

disable unused ports

dmz dns svr

enable secret password

retired false corp