CCNA Security 2.0 PT Practice SA Part 1


CCNA Security 2.0 PT Practice SA – Part 1

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 port security and disable unused switch ports
  • configure an IOS IPS
  • configure a Zone-based Policy Firewall (ZPF) to implement security policies

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
S0/0/1 192.31.7.1 255.255.255.252 n/a
G0/0 192.135.250.1 255.255.255.0 n/a
Public Svr NIC 192.135.250.5 255.255.255.0 192.135.250.1
External S0/0/0 192.31.7.2 255.255.255.252 n/a
G0/0 192.31.7.62 255.255.255.224 n/a
External Web Svr NIC 192.31.7.35 255.255.255.224 192.31.7.62 192.135.250.5
External User NIC 192.31.7.33 255.255.255.224 192.31.7.62 192.135.250.5
CORP S0/0/0 209.165.200.226 255.255.255.252 n/a
S0/0/1 209.165.200.254 255.255.255.252 n/a
Internal S0/0/1 209.165.200.253 255.255.255.252 n/a
G0/0 10.1.1.254 255.255.255.0 n/a
G0/1.10 172.16.10.254 255.255.255.0 n/a
G0/1.25 172.16.25.254 255.255.255.0 n/a
G0/1.99 172.16.99.1 255.255.255.0 n/a
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
AAA/NTP/Syslog Svr NIC 172.16.25.2 255.255.255.0 172.16.25.254 10.1.1.5
PC2 NIC 172.16.10.15 255.255.255.0 172.16.10.254 10.1.1.5
Net Admin NIC 172.16.25.5 255.255.255.0 172.16.25.254 10.1.1.5

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 and the Internal Routers.

  1. Configure the CORP and the Internal routers to only accept passwords with a minimum length of 10 characters.
  2. Configure an encrypted privileged level password of ciscoclass.
  3. Enable password encryption for all clear text passwords in the configuration file.
  4. Configure the console port and all vty lines with the following requirements:Note: Both the CORP and the Internal routers are already configured with the username CORPADMIN and password Ciscoccnas.
    • Use the local database for login.
    • Disconnect after being idle for 20 minutes.
  5. Disable the CDP protocol on the CORP router on the link to the Internet router.

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

  1. Configure the IOS login enhancement for all vty lines with the following requirements:
  • Disable logins for 30 seconds after 3 failed login attempts within 60 seconds.

Step 3: Configure Secure Network Management for the Internal Router.

  1. Configure the Internal router:
    • as an NTP client to the AAA/NTP/Syslog server
    • to update the router calendar (hardware clock) from the NTP time source
    • to timestamp log messages
    • to send logging messages to the AAA/NTP/Syslog server
  2. Configure the IOS login enhancement for all vty lines with the following requirements:
    • Disable logins for 30 seconds after 3 failed login attempts within 60 seconds.
    • Log any failed or successful login to the syslog server.
  3. Configure the Internal router to accept SSH connections. Use the following guidelines:Note: Internal is already configured with the username SSHAccess and the secret password ciscosshaccess.
    • The domain name is theccnas.com.
    • RSA encryption key pair using a modulus of 1024
    • SSH version 2, timeout of 90 seconds, and 2 authentication retries
    • All vty lines accept only SSH connections.
  4. Configure the Internal router with server-based AAA authentication and verify its functionality:Note: The AAA server is already configured with RADIUS service, a username CORPSYS, and the password LetSysIn.
    • The key to connect to the RADIUS server is corpradius.
    • AAA authentication uses the RADIUS server as the default for console line and vty lines access.
    • The local database is used as the backup if the RADIUS server connection cannot be established.

Step 4: Configure ACLs on the Internal Router to Implement Secure Management Access.

  1. Create ACL 12 to implement the security policy regarding the access to the vty lines:
  • Only users logged on to the Net Admin PC are allowed access to the vty lines.

 Step 5: Configure Device Hardening for Switch1 and Switch4

  1. Access Switch1 and Switch4 with username CORPADMIN, password Ciscoccnas, and the enable secret password of ciscoclass.
  2. Configure Switch1 to protect against STP attacks.
    • Configure PortFast on FastEthernet ports 0/1 to 0/22.
    • Enable BPDU guard on FastEthernet ports 0/1 to 0/22.
  3. Configure Switch1 port security and disable unused ports.
    • Set the maximum number of learned MAC addresses to 2 on FastEthernet ports 0/1 to 0/22. Allow the MAC address to be learned dynamically and to be retained in the running-config. Shutdown the port if a violation occurs.
    • Disable unused ports (Fa0/2-4, Fa0/6-10, Fa0/13-22).
  4. Configure the trunk link on Fa0/23 and Fa0/24 on both Switch1 and Switch4
    • Disable DTP negotiation on the trunking ports.
    • Set the native VLAN as VLAN 50 for the trunk links.

Step 6: Configure an IOS IPS on the Internal Router.

  1. On the Internal router, if asked to login, then login as CORPSYS with password LetSysIn. The enable secret password is ciscoclass.
  2. Use the IPS signature storage location at flash:.
  3. Create an IPS rule named corpips.
  4. Configure the IOS IPS to use the signature categories. Retire the all signature category and unretire the ios_ips basic category.
  5. Apply the IPS rule to the Gi0/0 interface in the out direction.
  6. 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 deny packets that match the signature.
  7. 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 7: Configure ZPF on the CORP Router.

  1. Access the CORP router with username CORPADMIN, password Ciscoccnas, and the enable secret password of ciscoclass.
  2. Create the firewall zones.
    • Create an internal zone named CORP-INSIDE.
    • Create an external zone named INTERNET.
  3. Define a traffic class to allow traffic from the Internal network to access services in the Internet.
    • Create a class map using the option of class map type inspect with the match-any keyword. Name the class map INSIDE_PROTOCOLS.
    • Match the protocols, httptcpudpicmpdns (Please note, the order of match statements is significant only because of the scoring need in Packet Tracer.)
  4. Specify firewall policies to allow internal hosts to access Internet.
    • Create a policy map named INSIDE_TO_INTERNET.
    • Use the INSIDE_PROTOCOLS class map.
    • Specify the action of inspect for this policy map.
  5. Define a traffic class to allow traffic from the Internet to access services in the DMZ network.
    • Create a class map using the option of class map type inspect with the match-any keyword. Name the class map DMZ_WEB.
    • Match the protocols, http and dns (Please note, the order of match statements is significant only because of the scoring need in Packet Tracer.)
  6. Specify firewall policy to allow Internet traffic to access DMZ services.
    • Create a policy map named INTERNET_TO_DMZWEB.
    • Use the DMZ_WEB class map.
    • Specify the action of pass for this policy map.
  7. Apply the firewall.
    • Create a pair of zones named IN_TO_OUT_ZONE with the source as CORP-INSIDE and destination as INTERNET.
    • Specify the policy map INSIDE_TO_INTERNET for handling the traffic between the two zones.
    • Create a pair of zones named INTERNET_TO_DMZ_ZONE with the source as INTERNET and destination as CORP-INSIDE.
    • Assign interfaces to the appropriate security zones.
  8. Verify the ZPF configuration.
    • The External user can access the URLs http://www.theccnas.com and http://www.externalone.com.
    • The External user cannot ping the DMZ Web Svr.
    • The PCs in the internal network can ping and access the External Web Svr URL.

 

CCNA Security 2.0 PT Practice SA – Part 1 question and answer will be revealed in this post. Hopefully this will helps you guys to pass this CCNA Security 2.0 Packet Tracer Practice SA Part 1 successfully. However, our current answer now only 84% correct. If you have complete 100% answer, please comment below or email to me.

CORP config

 

security  passwords min-length 10
enable secret ciscoclass
service passwordencryption
line console 0
login local
exectimeout 20 0
line vty 0 15
login local
exectimeout 20 0
exit
interface serial0/0/0
no cdp enable
login blockfor 30 attempts 3 within 60
zone security CORPINSIDE
exit
zone security INTERNET
exit
classmap type inspect matchany INSIDE_PROTOCOLS
match protocol http
match protocol tcp
match protocol udp
match protocol icmp
match protocol dns
exit
policymap type inspect INSIDE_TO_INTERNET
class type inspect INSIDE_PROTOCOLS
inspect
exit
exit
classmap type inspect matchany DMZ_WEB
match protocol http
match protocol dns
exit
policymap type inspect INTERNET_TO_DMZWEB
class type inspect DMZ_WEB
pass
exit
exit
zonepair security IN_TO_OUT_ZONE source CORPINSIDE destination INTERNET
servicepolicy type inspect INSIDE_TO_INTERNET
exit
zonepair security INTERNET_TO_DMZ_ZONE source INTERNET destination CORPINSIDE
servicepolicy type inspect INTERNET_TO_DMZWEB
exit
interface serial0/0/0
zonemember security INTERNET
exit
interface serial0/0/1
zonemember security CORPINSIDE
exit

Internal Config

security  passwords min-length 10
enable secret ciscoclass
service passwordencryption
login onfailure log
login onsuccess log
line console 0
login local
exectimeout 20 0
line vty 0 15
login local
exectimeout 20 0
exit
interface serial0/0/0
no cdp enable
login blockfor 30 attempts 3 within 60
ntp server 172.16.25.2 key 0
ntp updatecalendar
service  timestamps log datetime msec
logging host 172.16.25.2
ip domainname theccnas.com
crypto key generate rsa
1024
ip ssh version 2
ip ssh timeout 90
ip ssh authenticationretries 2
line vty 0 4
transport input ssh
exit
line vty 5 15
transport input ssh
exit
aaa newmodel
Radiusserver host 209.165.200.252 key corpradius
aaa authentication login default group radius local
aaa authentication login default local
aaa authorization exec default local
line vty 0 4
login authentication default
line vty 0 15
login authentication default
line con 0
login authentication default
exit
ip ips config location flash:
ip ips name corpips
ip ips signaturecategory
category all
retired true
exit
category ios_ips basic
retired false
exit
exit
interface Gig0/0
//Press ENTER

Switch1 Config

interface range fastEthernet0/1-22
spanningtree portfast
spanningtree bpduguard enable
switchport portsecurity
switchport portsecurity violation  shutdown
switchport portsecurity macaddress sticky
switchport portsecurity maximum 2
exit
interface range fastethernet 0/24
shutdown
interface range fastethernet 0/610
shutdown
interface range fastethernet 0/1322
shutdown
exit
interface range fa0/2324
switchport nonegotiate
switchport trunk native vlan 50

Switch4 Config

interface range fa0/23-24
switchport mode trunk
switchport nonegotiate
switchport trunk native vlan 50

To ending:

Network:Internal:AAA:Authentication:1
Network:Internal:RADIUS Client:RADIUS Server Hosts:0
Network:Internal:VTY Lines:0:Access Class In
Network:Internal:ACL:12
Network:Internal:IPS:Signature:Retired
Network:Internal:IPS:Signature:Icmp Signature Id
Network:Internal:IPS:Signature:Icmp Sub Id

Update from Commenter for 100%

access-list 12 permit host 172.16.25.5
line vty 0 15
access-class 12 in
exit

 

For Internal Config is continuing with:
interface Gi0/0
ip ips corpips out
exit
(config)#ip ips signature-definition
(config-sigdef)# signature 2004 0
(config-sigdef-sig)# status
(config-sigdef-sig-status)# retired false
(config-sigdef-sig-status)# enable true
(config-sigdef-sig-status)# exit
(config-sigdef-sig)# engine
(config-sigdef-sig-engine)# event-action produce-alert
(config-sigdef-sig-engine)# event-action deny-packet-inline
(config-sigdef-sig-engine)# exit
(config-sigdef-sig)# exit
(config-sigdef)# exit
(config)# exit

 

If you want to score a 100%, you must put one single line authentication aaa (first line) :

aaa authentication login default group radius local –> good

aaa authentication login default local ————> bad, because if you put both lines you delete the first line, that is the correct option.


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