I Enable NAT so that the DC_SERVER and DC_ADMIN can access internet, they are able to access the internet. BUT Now my DC_SERVER,
DC_ADMIN and Branches networks are unable to communicate with each other. Nothings works , Ping drops at this point.
If at this moment I disable NAT , now the Internal Networks are able to communicate with each other.
I don't understand where I am making a mistake. Pls help .\
Below is the firewall configuration. without NAT enabled. I only add the obove NAT statements for internet access.
ASA Version 8.2(1)
!
hostname ciscoasa
enable password cGBMrLCcjheJaVE/ encrypted
passwd cGBMrLCcjheJaVE/ encrypted
names
name 172.16.11.1 App1 description Application server 1
name 172.16.11.2 App2 description Application server 2
name 172.16.11.3 App3 description Application server 3
name 172.16.11.4 App4 description Application server 4
name 172.16.11.16 Additional_DC description Replication DC
name 172.16.11.18 Antivirus_Server description Antivirus_Server
name 172.16.11.7 DB1 description database server1
name 172.16.11.8 DB2 description Database server 2
name 172.16.11.20 Domain_Controller description Main Domain controller
name 172.16.11.5 MIS description MIS server
name 172.16.11.6 Test_Server description Test Server
!
interface Ethernet0/0
description servers are connected to this port
nameif DC_SERVER
security-level 100
ip address 172.16.11.12 255.255.255.0
!
interface Ethernet0/1
description All branches are connected to this port
nameif Branches
security-level 50
ip address 172.16.1.254 255.255.255.0
!
interface Ethernet0/2
description Administrator users connected to this port
nameif DC_ADMIN
security-level 70
ip address 172.16.25.254 255.255.255.0
!
interface Ethernet0/3
description broadband connection
nameif Internet
security-level 0
pppoe client vpdn group bsnl
ip address pppoe setroute
!
interface Management0/0
nameif mgmt
security-level 50
ip address 192.168.1.1 255.255.255.0
!
ftp mode passive
same-security-traffic permit inter-interface
object-group service rdp tcp
port-object eq 3389
object-group network All_Servers
description All servers group for branch access
network-object host Additional_DC
network-object host Antivirus_Server
network-object host App1
network-object host Domain_Controller
network-object host App2
network-object host App3
network-object host App4
network-object host MIS
network-object host Test_Server
network-object host DB1
network-object host DB2
access-list Internet_access_in extended permit icmp any any
access-list DC_access_in extended permit icmp any any
access-list DC_access_in extended permit ip any object-group All_Servers
access-list DC_ADMIN_access_in extended permit tcp any any object-group rdp
access-list DC_ADMIN_access_in extended permit icmp any any
access-list DC_ADMIN_access_in extended permit ip any object-group All_Servers
pager lines 24
mtu DC_SERVER 1500
mtu Branches 1500
mtu DC_ADMIN 1500
mtu Internet 1492
mtu mgmt 1500
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-621.bin
asdm location App2 255.255.255.255 DC_SERVER
asdm location App3 255.255.255.255 DC_SERVER
asdm location App4 255.255.255.255 DC_SERVER
asdm location MIS 255.255.255.255 DC_SERVER
asdm location Test_Server 255.255.255.255 DC_SERVER
asdm location DB1 255.255.255.255 DC_SERVER
asdm location DB2 255.255.255.255 DC_SERVER
asdm location Additional_DC 255.255.255.255 DC_SERVER
asdm location Antivirus_Server 255.255.255.255 DC_SERVER
asdm location Domain_Controller 255.255.255.255 DC_SERVER
no asdm history enable
arp timeout 14400
global (Internet) 1 interface
access-group DC_access_in in interface Branches
access-group DC_ADMIN_access_in in interface DC_ADMIN
access-group Internet_access_in in interface Internet
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 sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 192.168.1.0 255.255.255.0 mgmt
http 172.168.25.0 255.255.255.0 DC_ADMIN
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
telnet 172.16.25.0 255.255.255.0 DC_ADMIN
telnet 0.0.0.0 0.0.0.0 mgmt
telnet 192.16.1.0 255.255.255.0 mgmt
telnet timeout 30
ssh timeout 5
console timeout 0
vpdn group bsnl request dialout pppoe
vpdn group bsnl localname tmucbl
vpdn group bsnl ppp authentication chap
vpdn username tmucbl password 2731087
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
username admin password hmTyXifrd1RbLFWE encrypted privilege 15
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect netbios
inspect rsh
inspect rtsp
inspect skinny
inspect esmtp
inspect sqlnet
inspect sunrpc
inspect tftp
inspect sip
inspect xdmcp
!
service-policy global_policy global
prompt hostname context
Cryptochecksum:1a61843bd133114d24d618a26aee5423
: end
