Cisco Certified Security Professional

SNAF

Securing Networks with ASA Fundamentals

Lab Manual

Developed by M. Irfan Ghauri

M. Tanzeel Nasir

C-32/1 Block-5 Gulshan-e-Iqbal, Karachi ESP Press Ph #021-6034003 Copyrights 2011

ASA Lab Manual

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LAB. LABS DESCRIPTION PAGE

NO. 1

ASA Basic & Accessing ASA through Telnet/SSH/HTTP

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NETWORK ADDRESS TRANSLATION

Nat Control Static NAT Dynamic NAT PAT STATIC PAT POLICY NAT NAT 0

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Fitering ACTIVEX Objects and JAVA Applets

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4

Transparent Firewall

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5

Syslog server

20

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Cut through proxy through LOCAL database & AAA server

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7

Downloadable Acl

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8

Tcp intercept Max connection

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9

Object Grouping and Time-based Acl

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10

Routing a.Static Routing b.Dynamic Routing

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Dynamic Host Configuration Protocol

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12

Demilitarized Zone

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13

Intervlan Routing with ASA

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14

Modular Policy Framework

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Virtual Private Network Site to Site VPN Web VPN Remote Access VPN

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Lab # 1

ASA Basic Configuration How to verify Version ciscoasa(config)# sh version How to Set Hostname ciscoasa(config)# hostname ESP How to Set Time & Date ciscoasa# clock set 03:40:50 29 december 2010 How to Set Desired Banners ciscoasa(config)# banner exec "you are off" How to Configure a particular Interface ciscoasa(config)# interface ethernet 0/0

Assign IP ciscoasa(config-if)# ip address 20.0.0.10

Alive Interface ciscoasa(config-if)# no shutdown

Set Speed ciscoasa(config-if)# speed auto

Give Label ciscoasa(config-if)# nameif outside

Mention Security Level ciscoasa(config-if)# security-level 0 ciscoasa(config)# interface ethernet 0/1 ciscoasa(config-if)# ip address 10.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto

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ciscoasa(config-if)# nameif inside ciscoasa(config-if)# security-level 100

How to check Particular Interface information ciscoasa# sh interface ethernet 0/0 ciscoasa# sh interface ethernet 0/1 How to check the applied IP Addresses on the Device ciscoasa# sh ip addresses How to check interface Labels & Security Levels ciscoasa# sh nameif How to check Interfaces summary ciscoasa(config)# sh interface ip brief How to Save Configuration ciscoasa(config)# copy running-config start How to check state table ciscoasa(config)# sh conn How to check memory status ciscoasa# sh memory How to restrict access on Privilege mode ciscoasa(config)# enable password cisco How to check running configuration ciscoasa(config)# sh run How to check History of CLI ciscoasa# sh history

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Accessing ASA through Telnet/HTTP/SSH

Configuration Assigning Speed & IP Address on Inside & Outside Interfaces. ciscoasa(config)# interface ethernet 0/0 ciscoasa(config-if)# ip address 20.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto ciscoasa(config-if)# nameif outside ciscoasa(config)# interface ethernet 0/1 ciscoasa(config-if)# ip address 10.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto ciscoasa(config-if)# nameif inside How to Telnet Adaptive Security Appliance ciscoasa(config)# telnet 10.0.0.4 255.255.255.255 inside ciscoasa(config)# passwd cisco ciscoasa(config)# enable password cisco (Telnet only allow from inside) How to HTTP Adaptive Security Appliance ciscoasa(config)#http server enable ciscoasa(config)#http 10.0.0.1 255.255.255.255 inside How to SSH Adaptive Security Appliance ciscoasa(config)# crypto key generate rsa modulus 1024 ciscoasa(config)# ssh 10.0.0.1 255.255.255.255 inside ciscoasa(config)# ssh 20.0.0.4 255.255.255.255 outside Authentication With local database ciscoasa(config)#username tanzeel password cisco123 ciscoasa(config)# aaa authentication ssh console LOCAL

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At Machine 10.0.0.1:

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Verification Commands: ciscoasa(config)# show ssh ciscoasa(config)# show ssh session ciscoasa(config)# ssh disconnect session_id ciscoasa(config)# show crypto key mypubkey rsa

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Lab # 2

NETWORK ADDRESS TRANSLATION Network Address Translation allows to translate Private Addresses into Public Addresses

Nat Control Static NAT Dynamic NAT PAT STATIC PAT POLICY NAT NAT 0

Configuration Assigning Speed & IP Address on Inside & Outside Interfaces. ciscoasa(config)# interface ethernet 0/0 ciscoasa(config-if)# ip address 20.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto ciscoasa(config-if)# nameif outside ciscoasa(config)# interface ethernet 0/1 ciscoasa(config-if)# ip address 10.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto ciscoasa(config-if)# nameif inside ciscoasa (config)#nat-control

ciscoasa (config)# access-list 1 permit ip any any ciscoasa (config)# access-group 1 in interface outside

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STATIC NETWORK ADDRESS TRANSLATION

Configuration Establish Static NAT & ACLs. ciscoasa (config)# static (inside,outside) 20.0.0.51 10.0.0.1 ciscoasa (config)# static (inside,outside) 20.0.0.52 10.0.0.2

Verify Configuration by using following commands. ciscoasa (config)# show running-config nat ciscoasa (config)# show xlate ciscoasa (config)# show access-list 1

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DYNAMIC NETWORK ADDRESS

TRANSLATION

Configuration Establish Dynamic NAT, POOL & ACLss on Inside Interfaces. ciscoasa (config)# nat (inside) 1 0 0 ciscoasa (config)# global (outside) 1 20.0.0.51-20.0.0.60 Verify Configuration by using following commands. ciscoasa (config)# show running-config global ciscoasa (config)# show running-config nat ciscoasa (config)# show xlate ciscoasa (config)# show access-list 1

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DYNAMIC PORT ADDRESS TRANSLATION

Configuration Establish Dynamic PAT, POOL & ACLs ciscoasa (config)# nat (inside) 1 0 0 ciscoasa (config)# global (outside) 1 20.0.0.51

OR Establish Dynamic PAT by assigning Outside Interface IP Address to POOL ciscoasa (config)# nat (inside) 1 0 0 ciscoasa (config)# global (outside) 1 interface ciscoasa (config)# access-list 1 permit ip any any ciscoasa (config)# access-group 1 in interface outside

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Verify Configuration by using following commands. ciscoasa (config)# show running-config global ciscoasa (config)# show running-config nat ciscoasa (config)# show xlate ciscoasa (config)# show access-list 1

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STATIC PAT

Configuration Establish Port Redirection & ACLs ciscoasa (config)# static (inside,outside) tcp 20.0.0.50 http 10.0.0.1 80 Verify results by browsing 20.0.0.50 from outside machine.

(Outside Machine will successfully access local Web Server) Verify Configuration by using following commands. ciscoasa (config)# show running-config nat ciscoasa (config)# show running-config xlate

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POLICY NAT

Configuration Apply ACLs & NAT POLICY ciscoasa (config)# access-list 101 permit ip 10.0.0.0 255.0.0.0 host 20.0.0.1 ciscoasa (config)# access-list 102 permit ip 10.0.0.0 255.0.0.0 host 20.0.0.2 ciscoasa (config)# nat (inside) 1 access-list 101 ciscoasa (config)# global (outside) 1 20.0.0.51 ciscoasa (config)# nat (inside) 2 access-list 102 ciscoasa (config)# global (outside) 2 20.0.0.52

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Verify Configuration by using following commands. ciscoasa (config)# show running-config nat ciscoasa (config)# show xlate ciscoasa (config)# show running-config global

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NAT CONTROL

AND NAT 0

Configuration Enable Nat control. ciscoasa (config)# nat-control Apply NAT 0 Policy for ATIF. ciscoasa (config)# nat (inside) 0 10.0.0.2 255.255.255.255 Verify Configuration by using following commands. ciscoasa (config)# show xlate ciscoasa (config)# show running-config global

IP Address 10.0.0.1

IP Address 20.0.0.2

ATIF using NAT0 policy

10.0.0.210.0.0.2

IP Address 20.0.0.1

IP Address 10.0.0.2

ALI requires a NAT rule

IP Address 10.0.0.10 IP Address 20.0.0.10

E1 EO

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Lab # 3

FILTERING ACTIVEX OBJECTS AND

JAVA APPLETS

Configuration Apply Filters. ciscoasa (config)# filter java 80 0 0 0 0 ciscoasa (config)# filter activex 80 0 0 0 0 Verify results by browsing outside machine from any inside machine.

(Host will successfully access the HTML page )

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Lab # 4 TRANSPARENT FIREWALL

Configuration Assigning Speed & no Shut Inside & Outside Interfaces. ciscoasa (config)# firewall transparent ciscoasa (config)# interface ethernet 0/0 ciscoasa (config-if)# no shutdown ciscoasa (config-if)# speed auto ciscoasa (config-if)# nameif outside ciscoasa (config)# interface ethernet 0/1 ciscoasa (config-if)# no shutdown ciscoasa (config-if)# speed auto ciscoasa (config-if)# nameif inside

IP Address 10.0.0.1

IP Address 10.0.0.2

IP Address 10.0.0.3

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ciscoasa (config)# access-list 1 permit ip any any ciscoasa (config)# access-group 1 in interface outside ciscoasa (config)# ip address 10.0.0.10 255.255.255.0 Verify results by IOS commands. ciscoasa (config)# show firewall ciscoasa (config)# show mac-address-table

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Lab # 5

SYSLOG SERVER

Configuration: ciscoasa(config)# logging on ciscoasa(config)# logging host inside 10.0.0.2 ciscoasa(config)# logging trap 7 Verification Commands: ciscoasa(config)# show logging

IP Address 10.0.0.1

IP Address 20.0.0.2

IP Address 20.0.0.1

SYSLOG IP Address

10.0.0.2

IP Address 10.0.0.10 IP Address 20.0.0.10

E1 EO

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Lab # 6 Cut through proxy through LOCAL database

& AAA server

Configuration Cut through Proxy through Local database ciscoasa(config)# username admin password admin ciscoasa(config)# aaa authentication include any inside 0 0 0 0 LOCAL Cut through Proxy with AAA server ciscoasa(config)# aaa-server esp protocol tacacs+ ciscoasa(config-aaa-server-group)# aaa-server esp host 10.0.0.1 cisco123 ciscoasa(config)# aaa authentication include any inside 0 0 0 0 esp

IP Address 10.0.0.2

IP Address 20.0.0.2

IP Address 20.0.0.1

IP Address 10.0.0.3

IP Address 10.0.0.10 IP Address 20.0.0.10

E1 EO

AAA SERVER IP Address

10.0.0.1

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Configuration on ACS server

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User accounts on AAA

Verification Commands: ciscoasa(config)# show uauth ciscoasa(config)# clear uauth

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Lab # 7 Downloadable Acl

Cisco Secure ACS allows to create downloadable ACLs. By this various ACLs can be formed for different users. Downloadable ACL will be activated only when the particular user sign in. Step 1:Configure AAA server using Radius Protocol. ciscoasa(config)# aaa-server esp protocol radius ciscoasa(config-aaa-server-group)# aaa-server esp host 10.0.0.4 cisco ciscoasa(config-aaa-server-host)# aaa authentication include any inside 0 0 0 0 esp

IP Address 10.0.0.2

IP Address 20.0.0.2

ATIF

IP Address 20.0.0.1

IP Address 10.0.0.3

ALI

IP Address 10.0.0.10 IP Address 20.0.0.10

E1 EO

AAA SERVER IP Address

10.0.0.1

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Configuration on ACS server

Step 2:Form Downloadable ACL through Shared profile Components (if Downloadable option is not available then click on Interface Configuration. )

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Now option is added in Shared Profile Components

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Step 3: Add User Ali and apply Downloadable ACL on users profile.

Step 3: Verify results.

( Atif can successfully browse & ftp outside network) BUT

( Ali can only successfully ftp outside network) Verification Commands: ciscoasa(config)# show uauth ciscoasa(config)# clear uauth ciscoasa(config)# show conn

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Lab # 8 TCP Intercept Maximum Connection

Configuration: ciscoasa(config)# static (inside,outside) 20.0.0.50 10.0.0.1 1 0 ciscoasa(config)# access-list 1 permit ip any any ciscoasa(config)# access-group 1 in interface outside Verification Commands: ciscoasa(config)# show running-config static ciscoasa(config)# show local-host ciscoasa(config)# show xlate ciscoasa(config)# show conn

IP Address 10.0.0.1

IP Address 20.0.0.2

IP Address 20.0.0.1

FTP & WEB SERVER

IP Address 10.0.0.2

IP Address 10.0.0.10 IP Address 20.0.0.10

E1 EO

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Lab # 9

Object Grouping

Configuration: Create network object ciscoasa(config)# object-group network esp ciscoasa(config-network)# network-object host 20.0.0.1 ciscoasa(config-network)# network-object host 20.0.0.2 ciscoasa(config-network)# network-object host 20.0.0.3 ciscoasa(config-network)# exi Create service object ciscoasa(config)# object-group service httpftp tcp ciscoasa(config-service)# port-object eq 80 ciscoasa(config-service)# port-object eq 21 ciscoasa(config-service)# exi

IP Address 10.0.0.1

IP Address 20.0.0.2

IP Address 20.0.0.1

FTP & WEB SERVER

IP Address 10.0.0.2

IP Address 10.0.0.10 IP Address 20.0.0.10

E1 EO

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Calling object in ACL ciscoasa(config)# access-list 101 extended permit tcp object-group esp host 10.0.0.1 object-group httpftp ciscoasa(config)# access-group 101 in interface outside

Time-based Acl Configuration: ciscoasa(config)#time-range test ciscoasa(config-time-range)#periodic daily 15:00 to 15:30 ciscoasa(config-time-range)#exit

ciscoasa(config)# access-list 101 permit ip any any time-range test ciscoasa(config)#access-group 101 in interface outside Verifying commands ciscoasa(config)# show access-list ciscoasa(config)# show run object-group

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Lab # 10 Routing

Configuration : ciscoasa(config)# interface ethernet 0/0 ciscoasa(config-if)# ip address 15.0.0.1 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# nameif outside ciscoasa(config-if)# security-level 0 ciscoasa(config)# interface ethernet 0/1 ciscoasa(config-if)# ip address 10.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto

R2

IP Address 15.0.0.2 Fa0/0 IP Address 15.0.0.1 E0

IP Address 10.0.0.10

Ethernet 1

Host A IP Address

10.0.0.1

FTP Server Host B

IP Address 10.0.0.2

WEB Server

IP Address 20.0.0.1

IP Address 20.0.0.10

Fa0/1

IP Address 20.0.0.2

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ciscoasa(config-if)# nameif inside ciscoasa(config-if)# security-level 100

Static Routing Dynamic Routing RIP OSPF EIGRP

Static Routes Commands on Asa ciscoasa(config)#route outside 20.0.0.0 255.0.0.0 15.0.0.2

Rip Commands on Asa ciscoasa(config)#router rip ciscoasa(config-router)#network 15.0.0.0 ciscoasa(config-router)#network 10.0.0.0 Ospf Commands on Asa ciscoasa(config)#router ospf 64 ciscoasa(config-router)#network 15.0.0.0 255.0.0.0 area 0 ciscoasa(config-router)#network 10.0.0.0 255.0.0.0 area 0 Eigrp Commands on Asa ciscoasa(config)#router eigrp 10 ciscoasa(config-router)#network 15.0.0.0 ciscoasa(config-router)#network 10.0.0.0 ciscoasa(config-router)#exit Verifying Commands ciscoasa(config)#sh route ciscoasa(config)#sh rip database ciscoasa(config)#sh ospf interface ciscoasa(config)#sh ospf neighbor ciscoasa(config)# sh eigrp interfaces ciscoasa(config)# sh eigrp neighbors

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Lab # 11 DYNAMIC HOST CONFIGURATION PROTOCOL ASA Firewall has features that let it be Configured as a

DHCP SERVER DHCP CLIENT

DHCP SERVER

Configuration Create POOL for Inside Hosts. ciscoasa(config)# dhcpd address 10.0.0.51-10.0.0.61 inside Enable DHCP on the ASA Firewall. ciscoasa(config)#dhcpd enable inside

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Verify Configuration by using following commands. ciscoasa(config)# show dhcpd binding ciscoasa(config)# show dhcpd state ciscoasa(config)# clear dhcpd bindings ciscoasa(config)# debug dhcpd events ciscoasa(config)# debug dhcpd packet

DHCP CLIENT

Configuration Step 1: Enable DHCP Client. ciscoasa(config)#int e0/0 ciscoasa(config)# ip address dhcp

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Step 2: Define new scope for IP addresses range.

Step 3: Verify Configuration by using following commands. ciscoasa(config)#debug dhcpd events ciscoasa(config)#debug dhcpd packet

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Lab # 12

Demilitarized Zone

Configuration Step 1:Assign IPs and Define Security Levels. ciscoasa(config)# interface ethernet 0/0 ciscoasa(config-if)# ip address 20.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto ciscoasa(config-if)# nameif outside ciscoasa(config)# interface ethernet 0/1 ciscoasa(config-if)# ip address 10.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto ciscoasa(config-if)# nameif inside

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ciscoasa(config)# interface ethernet 0/2 ciscoasa(config-if)# ip address 30.0.0.10 ciscoasa(config-if)# no shutdown ciscoasa(config-if)# speed auto ciscoasa(config-if)# nameif dmz Apply PAT for inside Users & Static Nat for server on DMZ Interface. ciscoasa(config)# nat (inside) 1 0 0 ciscoasa(config)# global (outside) 1 interface ciscoasa(config)# static (dmz,outside) 40.0.0.51 30.0.0.1 ciscoasa(config)# static (dmz,outside) 40.0.0.52 30.0.0.2 Establish ACL to allow traffic from lower security level to servers. ciscoasa(config)# access-list 101 permit tcp any host 40.0.0.51 eq www ciscoasa(config)# access-list 101 permit tcp any host 40.0.0.52 eq ftp ciscoasa(config)# access-group 1 in interface outside Verifying Commands ciscoasa(config)#sh run access-list ciscoasa(config)#sh run interface

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Lab # 13 INTER-VLAN ROUTING WITH ASA

Configuration ciscoasa(config)#Interface Ethernet0/2 ciscoasa(config-if)#no shut ciscoasa(config-if)#no ip add ciscoasa(config-if)#exit

Vlan 30 Vlan 40

FTP Server 40.0.0.1/8 40.0.0.10

WEB Server 30.0.0.1/8 30.0.0.10

2950 Fa 0/4 Fa 0/3

E 0 / 2.30 30.0.0.10 / 8

E 0 / 2.40 40.0.0.10 / 8

Fa 0/24

Security-level 30 Security-level 40

IP Address 10.0.0.10

Ethernet 0/1 IP Address 20.0.0.10

Ethernet 0/0

IP Address 20.0.0.1 IP Address 10.0.0.1

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ciscoasa(config)#Interface Ethernet0/2.30 ciscoasa(config-if)#vlan 30 ciscoasa(config-if)#no shutdown ciscoasa(config-if)#nameif www ciscoasa(config-if)#security-level 30 ciscoasa(config-if)#ip address 30.0.0.10 255.0.0.0 ciscoasa(config)#Interface Ethernet0/2.40 ciscoasa(config-if)#vlan 40 ciscoasa(config-if)#no shutdown ciscoasa(config-if)#nameif ftp ciscoasa(config-if)#security-level 40 ciscoasa(config-if)#ip address 40.0.0.10 255.0.0.0 After Configuration inside(100) users access ftp(40) and web(30) service now if u want to allow outside users to access ftp and web service make an access-list to allow them ciscoasa(config)# access-list 101 permit tcp any host 30.0.0.1 eq ftp ciscoasa(config)#access-group 101 in interface outside Switch configuration Switch(config)#vlan 30 Switch(config-vlan)#name www Switch(config)#vlan 40 Switch(config-vlan)#name ftp Switch(config)#interface fa0/3 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 30 Switch(config)#interface fa0/4 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 40 Switch(config)#interface fa0/24 Switch(config-if)#switchport mode trunk Verifying Commands ciscoasa(config)#sh run access-list ciscoasa(config)#sh run interface

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Lab # 14 MODULAR POLICY FRAMEWORK

Configuration Step 1:Define Class Name. ASA(config)# class-map http ASA(config-cmap)# match port tcp eq 80 Step 2:Define Classes to the Policy Map ASA(config)# policy-map esp ASA(config-pmap)# class-map http ASA(config-pmap-c)# priority-queue inside ASA(config)# service-policy esp interface inside Step 3:Verify Results by IOS commands. ASA# show service-policy

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Lab # 15 SITE TO SITE VPN

Configuration Site-to-Site Vpn Configuration on Asa ciscoasa(config)#crypto isakmp enable outside ciscoasa(config-isakmp-policy)#crypto isakmp policy 10 ciscoasa(config)# authen pre-share ciscoasa(config)# hash md5 ciscoasa(config)# encrypt des ciscoasa(config)# group 2 ciscoasa(config)# tunnel-group 15.0.0.2 type ipsec-l2l ciscoasa(config)# tunnel-group 15.0.0.2 ipsec-attributes ciscoasa(config-tunnel-ipsec)# pre-shared-key cisco123

WAN RmtRouter

IP Address 15.0.0.2 Fa0/0 IP Address 15.0.0.1 E0

IP Address 10.0.0.10

Ethernet 1

Host A IP Address

10.0.0.1

FTP Server

Host B IP Address

10.0.0.2

WEB Server IP Address

20.0.0.1

IP Address 20.0.0.10

Fa0/1

IP Address 20.0.0.2

Rmt Users

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ciscoasa(config)# access-list 101 permit ip 10.0.0.0 255.0.0.0 20.0.0.0 255.0.0.0 ciscoasa(config)# crypto ipsec transform-set aset esp-des esp-md5-hmac ciscoasa(config)# crypto map outside_map 1 set peer 15.0.0.2 ciscoasa(config)# crypto map outside_map 1 set transform-set aset ciscoasa(config)#crypto map outside_map 1 match address 101 ciscoasa(config)# crypto map outside_map interface outside

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IPsec(Site-to-Site) VPN Wizard

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CLIENT LESS WEB VPN

Unlike a standard IPSec VPN which requires specific client software, Web VPN is a clientless Remote-Access VPN that uses a web browser to access a Corporate Network.

Configuration SSL VPN Wizard

WAN IP Address 20.0.0.10

E0

IP Address 10.0.0.10

Ethernet 1

Host A IP Address

10.0.0.1

IP Address 20.0.0.1 With no Vpn client

Local web Server IP Address 10.0.0.2

Local FTP Server IP Address 10.0.0.3

IP Address 20.0.0.5 With no Vpn client

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Verify results by accessing Corporate Network. Type username and password .

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Step 3(A): Verify results by IOS commands. ciscoasa# show running-config webvpn

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REMOTE-ACCESS VPN

Access VPN provides secure communication with remote users who are working from home and connect through modem or mobile but they should have client Hardware & client Software running on there computers.

Configuration IPsec(Remote-access) VPN Wizard

WAN IP Address 20.0.0.10

E0

IP Address 10.0.0.10

Ethernet 1

Host A IP Address

10.0.0.1

IP Address 20.0.0.1 With Vpn client

Local web Server IP Address 10.0.0.2

Local FTP Server IP Address 10.0.0.3

IP Address 20.0.0.5 With Vpn client

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ASA BasicAccessing ASA through Telnet/HTTP/SSH