11.3.1.1 Packet Tracer – Skills Integration Challenge Answers

Packet Tracer – Skills Integration Challenge

Topology

Addressing Table

Objectives

•  Configure basic router security
•  Configure basic switch security
•  Configure AAA local authentication
•  Configure SSH
•  Secure against login attacks
•  Configure site-to-site IPsec VPNs
•  Configure firewall and IPS settings
•  Configure ASA basic security and firewall settings

Scenario

This culminating activity includes many of the skills that you have acquired during this course. The routers and switches are preconfigured with the basic device settings, such as IP addressing and routing. You will secure routers using the CLI to configure various IOS features, including AAA, SSH, and Zone-Based Policy Firewall (ZPF). You will configure a site-to-site VPN between R1 and R3. You will secure the switches on the network. In addition, you will also configure firewall functionality on the ASA.

Requirements

Note: Not all security features will be configured on all devices, however, they would be in a production network.

Configure Basic Router Security

•  Configure the following on R1:

º  Minimum password length is 10 characters.
º  Encrypt plaintext passwords.
º  Privileged EXEC mode secret password is ciscoenapa55.
º  Console line password is ciscoconpa55, timeout is 15 minutes, and console messages should not interrupt command entry.
º  A message-of-the-day (MOTD) banner should include the word unauthorized.

•  Configure the following on R2:

º  Privileged EXEC mode secret password is ciscoenapa55.
º  Password for the VTY lines is ciscovtypa55, timeout is 15 minutes, and login is required.

Configure Basic Switch Security

•  Configure the following on S1:

º  Encrypt plaintext passwords.
º  Privileged EXEC mode secret password is ciscoenapa55.
º  Console line password is ciscoconpa55, timeout is 5 minutes, and consoles messages should not interrupt command entry.
º  Password for the VTY lines is ciscovtypa55, timeout is 5 minutes, and login is required.
º  An MOTD banner should include the word unauthorized.

•  Configure trunking between S1 and S2 with the following settings:

º  Set the mode to trunk and assign VLAN 99 as the native VLAN.
º  Disable the generation of DTP frames.

•  Configure the S1 with the following port settings:

º  F0/6 should only allow access mode, set to PortFast, and enable BPDU guard.
º  F0/6 uses basic default port security with dynamically learned MAC addresses added to the running configuration.
º  All other ports should be disabled.

Note: Although not all ports are checked, your instructor may want to verify that all unused ports are disabled.

Configure AAA Local Authentication

•  Configure the following on R1:

º  Create a local user account of Admin01, a secret password of Admin01pa55, and a privilege level of 15.
º  Enable AAA services.
º  Implement AAA services using the local database as the first option and then the enable password as the backup option.

Configure SSH

•  Configure the following on R1:

º  The domain name is ccnasecurity.com
º  The RSA key should be generated with 1024 modulus bits.
º  Only SSH version 2 is allowed.
º  Only SSH is allowed on VTY lines.

•  Verify that PC-C can remotely access R1 (209.165.200.233) using SSH.

Secure Against Login Attacks

•  Configure the following on R1:

º  If a user fails to log in twice within a 30-second time span, disable logins for one minute.
º  Log all failed login attempts.

Configure Site-to-Site IPsec VPNs

Note: Some VPN configurations are not scored. However, you should be able to verify connectivity across the IPsec VPN tunnel.

•  Enable the Security Technology package license on R1.

º  Save the running configuration before reloading.

•  Configure the following on R1:

º  Create an access list to identify interesting traffic on R1.
º  Configure ACL 101 to allow traffic from the R1 Lo1 network to the R3 G0/1 LAN.

•  Configure the crypto isakmp policy 10 Phase 1 properties on R1 and the shared crypto key ciscovpnpa55. Use the following parameters:

º  Key distribution method: ISAKMP
º  Encryption: aes 256
º  Hash: sha
º  Authentication method: pre-shared
º  Key exchange: DH Group 5
º  IKE SA lifetime: 3600
º  ISAKMP key: ciscovpnpa55

•  Create the transform set VPN-SET to use esp-aes 256 and esp-sha-hmac. Then create the crypto map CMAP that binds all of the Phase 2 parameters together. Use sequence number 10 and identify it as an ipsec-isakmp map. Use the following parameters:

º  Transform set: VPN-SET
º  Transform encryption: esp-aes 256
º  Transform authentication: esp-sha-hmac
º  Perfect Forward Secrecy (PFS): group5
º  Crypto map name: CMAP
º  SA establishment: ipsec-isakmp
º  Bind the crypto map (CMAP) to the outgoing interface.

•  Verify that the Security Technology package license is enabled. Repeat the site-to-site VPN configurations on R3 so that they mirror all configurations from R1.

•  Ping the Lo1 interface (172.20.1.1) on R1 from PC-C. On R3, use the show crypto ipsec sa command to verify that the number of packets is more than 0, which indicates that the IPsec VPN tunnel is working.

Configure Firewall and IPS Settings

•  Configure a ZPF on R3 using the following requirements:

º  Create zones named IN-ZONE and OUT-ZONE.
º  Create an ACL number 110 that defines internal traffic, which permits all IP protocols from the 172.30.3.0/24 source network to any destination.

•  Create a class map named INTERNAL-CLASS-MAP that uses the match-all option and ACL 110.

•  Create a policy map named IN-2-OUT-PMAP that uses the class map INTERNAL-CLASS-MAP to inspect all matched traffic.

•  Create a zone pair named IN-2-OUT-ZPAIR that identifies IN-ZONE as the source zone and OUT-ZONE as the destination zone.

º  Specify that the IN-2-OUT-PMAP policy map is to be used to inspect traffic between the two zones.
º  Assign G0/1 as an IN-ZONE member and S0/0/1 as an OUT-ZONE member.

•  Configure an IPS on R3 using the following requirements:

Note: Within Packet Tracer, the routers already have the signature files imported and in place. They are the default XML files in flash. For this reason, it is not necessary to configure the public crypto key and complete a manual import of the signature files.

º  Create a directory in flash named ipsdir and set it as the location for IPS signature storage.
º  Create an IPS rule named IPS-RULE.
º  Retire the all signature category with the retired true command (all signatures within the signature release).
º  Unretire the IOS_IPS Basic category with the retired false command.
º  Apply the rule inbound on the S0/0/1 interface.

Configure ASA Basic Security and Firewall Settings

•  Configure VLAN interfaces with the following settings:

º  For the VLAN 1 interface, configure the addressing to use 192.168.10.1/24.
º  For the VLAN 2 interface, remove the default DHCP setting and configure the addressing to use 209.165.200.234/29.

•  Configure hostname, domain name, enable password, and console password using the following settings:

º  The ASA hostname is CCNAS-ASA.
º  The domain name is ccnasecurity.com.
º  The enable mode password is ciscoenapa55.

•  Create a user and configure AAA to use the local database for remote authentication.

º  Configure a local user account named admin with the password adminpa55. Do not use the encrypted attribute.
º  Configure AAA to use the local ASA database for SSH user authentication.
º  Allow SSH access from the outside host 172.30.3.3 with a timeout of 10 minutes.

•  Configure the ASA as a DHCP server using the following settings:

º  Assign IP addresses to inside DHCP clients from 192.168.10.5 to 192.168.10.30.
º  Enable DHCP to listen for DHCP client requests.

•  Configure static routing and NAT.

º  Create a static default route to the next hop router (R1) IP address.
º  Create a network object named inside-net and assign attributes to it using the subnet and nat commands.
º  Create a dynamic NAT translation to the outside interface.

•  Modify the Cisco Modular Policy Framework (MPF) on the ASA using the following settings:

º  Configure class-map inspection_default to match default-inspection-traffic, and then exit to global configuration mode.
º  Configure the policy-map list global_policy. Enter the class inspection_default and enter the command to inspect icmp. Then exit to global config mode.
º  Configure the MPF service-policy to make the global_policy apply globally.

!-------------------------------
!Configure Basic Router Security
!-------------------------------
!R1
conf t
security passwords min-length 10
enable secret ciscoenapa55
service password-encryption
line console 0
password ciscoconpa55
exec-timeout 15 0
login
logging synchronous
banner motd $Unauthorized access strictly prohibited and prosecuted to the full 
extent of the law!$
end

!R2
conf t
enable secret ciscoenapa55
line vty 0 4
password ciscovtypa55
exec-timeout 15 0
login
end

!-------------------------
!Configure Switch Security
!-------------------------
!S1
conf t
service password-encryption
enable secret ciscoenapa55
line console 0 
password ciscoconpa55
exec-timeout 5 0
login
logging synchronous
line vty 0 15
password ciscovtypa55
exec-timeout 5 0
login
banner motd $Unauthorized access strictly prohibited and prosecuted to the full 
extent of the law!$
end

!Trunking
!S1 and S2
conf t
interface FastEthernet 0/1
switchport mode trunk
switchport trunk native vlan 99
switchport nonegotiate
end

!S1 Port Security
conf t
interface FastEthernet 0/6
switchport mode access
spanning-tree portfast
spanning-tree bpduguard enable
shutdown
switchport port-security
switchport port-security mac-address sticky
no shutdown
interface range f0/2 – 5 , f0/7 – 24 , g0/1 - 2
shutdown
end

!----------------------------------
!Configure AAA Local Authentication
!----------------------------------
!R1
conf t
username Admin01 privilege 15 secret Admin01pa55
aaa new-model
aaa authentication login default local enable
end

!-------------------------
!Configure SSH
!-------------------------
!R1 
conf t
ip domain-name ccnasecurity.com
crypto key generate rsa
1024
ip ssh version 2
line vty 0 4
transport input ssh
end

!----------------------------
!Secure Against Login Attacks
!----------------------------
!R1
conf t
login block-for 60 attempts 2 within 30
login on-failure log

!---------------------------------
!Configure Site-to-Site IPsec VPNs
!---------------------------------
!R1
conf t
access-list 101 permit ip 172.20.1.0 0.0.0.255 172.30.3.0 0.0.0.255
crypto isakmp policy 10
encryption aes 256
authentication pre-share
hash sha
group 5
lifetime 3600
exit
crypto isakmp key ciscovpnpa55 address 10.20.20.1
crypto ipsec transform-set VPN-SET esp-aes 256 esp-sha-hmac
crypto map CMAP 10 ipsec-isakmp
set peer 10.20.20.1
set pfs group5
set transform-set VPN-SET
match address 101
exit
interface S0/0/0
crypto map CMAP
end

!R3
conf t
access-list 101 permit ip 172.30.3.0 0.0.0.255 172.20.1.0 0.0.0.255
crypto isakmp policy 10
encryption aes 256
authentication pre-share
hash sha 
group 5
lifetime 3600
exit
crypto isakmp key ciscovpnpa55 address 10.10.10.1
crypto ipsec transform-set VPN-SET esp-aes 256 esp-sha-hmac
crypto map CMAP 10 ipsec-isakmp
set peer 10.10.10.1
set transform-set VPN-SET
match address 101
exit
interface S0/0/1
crypto map CMAP
end

!-----------------------------------
!Configure Firewall and IPS Settings
!-----------------------------------
!R3
conf t
!Firewall configs
zone security IN-ZONE
zone security OUT-ZONE
access-list 110 permit ip 172.30.3.0 0.0.0.255 any
access-list 110 deny ip any any
class-map type inspect match-all INTERNAL-CLASS-MAP
match access-group 110
exit
policy-map type inspect IN-2-OUT-PMAP
class type inspect INTERNAL-CLASS-MAP
inspect
zone-pair security IN-2-OUT-ZPAIR source IN-ZONE destination OUT-ZONE
service-policy type inspect IN-2-OUT-PMAP
exit
interface g0/1
zone-member security IN-ZONE
exit
interface s0/0/1
zone-member security OUT-ZONE
end

!IPS configs
mkdir ipsdir
conf t
ip ips config location flash:ipsdir
ip ips name IPS-RULE
ip ips signature-category
category all
retired true
exit 
category ios_ips basic
retired false
exit
<Enter>
interface s0/0/1
ip ips IPS-RULE in

!--------------------------------------------------
!Configure ASA Basic Security and Firewall Settings
!--------------------------------------------------
!CCNAS-ASA
enable
<Enter>
conf t
interface vlan 1
nameif inside
security-level 100
ip address 192.168.10.1 255.255.255.0
interface vlan 2
nameif outside
security-level 0
no ip address dhcp
ip address 209.165.200.234 255.255.255.248
exit
hostname CCNAS-ASA
domain-name ccnasecurity.com
enable password ciscoenapa55
username admin password adminpa55
aaa authentication ssh console LOCAL
ssh 192.168.10.0 255.255.255.0 inside
ssh 172.30.3.3 255.255.255.255 outside
ssh timeout 10
dhcpd address 192.168.10.5-192.168.10.30 inside
dhcpd enable inside
route outside 0.0.0.0 0.0.0.0 209.165.200.233
object network inside-net
subnet 192.168.10.0 255.255.255.0
nat (inside,outside) dynamic interface
exit
conf t
class-map inspection_default
match default-inspection-traffic
exit
policy-map global_policy
class inspection_default
inspect icmp
exit
service-policy global_policy global

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