Configuring ASA , Controlling inbound and outbound traffic with ACLs, Example

Configuring ASA , Controlling inbound and outbound traffic with ACLs, Example

ASA
Interface	E0/0	E0/1	E0/2
IP Address	100.1.1.10	192.168.1.1	10.0.0.10
Net mask	255.255.255.0	255.255.255.0	255.255.255.0
ISP Router
Interface	E1/0
IP Address	100.1.1.11
Net mask	255.255.255.0
DMZ_1 ROUTER
Interface	E1/0
IP Address	10.0.0.1
Net mask	255.255.255.0
DMZ_2 ROUTER
Interface	E1/0
IP Address	10.0.0.2
Net mask	255.255.255.0
USER1 ROUTER
Interface	E1/0
IP Address	192.168.1.10
Net mask	255.255.255.0
USER2 ROUTER
Interface	E1/0
IP Address	192.168.1.11
Net mask	255.255.255.0

ASA Configuration

ciscoasa# show run

: Saved

:

ASA Version 8.0(2)

!

hostname ciscoasa

enable password 8Ry2YjIyt7RRXU24 encrypted

names

!

interface Ethernet0/0

 nameif outside

 security-level 0

 ip address 100.1.1.10 255.255.255.0

no shut

!

interface Ethernet0/1

 nameif inside

 security-level 100

 ip address 192.168.1.1 255.255.255.0

no shut

!

interface Ethernet0/2

 nameif dmz

 security-level 50

 ip address 10.0.0.10 255.255.255.0

no shut

!

passwd 2KFQnbNIdI.2KYOU encrypted

ftp mode passive

access-list outside-in extended permit tcp any host 100.1.1.1 eq www

access-list outside-in extended permit tcp any host 100.1.1.2 eq smtp

access-list outside-in extended permit tcp any host 100.1.1.2 eq telnet

pager lines 24

mtu outside 1500

mtu inside 1500

mtu dmz 1500

no failover

icmp unreachable rate-limit 1 burst-size 1

no asdm history enable

arp timeout 14400

global (outside) 1 100.1.1.20-100.1.1.25 netmask 255.255.255.0

nat (inside) 1 192.168.1.0 255.255.255.0

static (dmz,outside) 100.1.1.1 10.0.0.1 netmask 255.255.255.255

static (dmz,outside) 100.1.1.2 10.0.0.2 netmask 255.255.255.255

access-group outside-in in interface outside

timeout xlate 3:00:00

timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02

timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00

timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00

timeout uauth 0:05:00 absolute

dynamic-access-policy-record DfltAccessPolicy

no snmp-server location

no snmp-server contact

snmp-server enable traps snmp authentication linkup linkdown coldstart

no crypto isakmp nat-traversal

telnet timeout 5

ssh timeout 5

console timeout 0

threat-detection basic-threat

threat-detection statistics access-list

!

!

prompt hostname context

Cryptochecksum:00000000000000000000000000000000

: end

ciscoasa#

ISP Router Configuration

interface Ethernet1/0

 ip address 100.1.1.11 255.255.255.0

no shut

DMZ1 Router Configuration

interface Ethernet1/0

 ip address 10.0.0.1 255.255.255.0

no shut

 ip route 0.0.0.0 0.0.0.0 10.0.0.10

line vty 0 4

 login

DMZ2 Router Configuration

interface Ethernet1/0

 ip address 10.0.0.2 255.255.255.0

 no shut

ip route 0.0.0.0 0.0.0.0 10.0.0.10

line vty 0 4

 password test

 login

USER1 Router  Configuration

interface Ethernet1/0

 ip address 192.168.1.10 255.255.255.0

no shut

USER2 Router Configuration

interface Ethernet1/0

 ip address 192.168.1.11 255.255.255.0

 no shut

ip route 0.0.0.0 0.0.0.0 192.168.1.1

Now open telnet session from ISP router to DMZ2 Router

User1#telnet  100.1.1.2

Verifying 

ciscoasa# show xlate