09-13-2012 07:06 AM - edited 03-11-2019 04:53 PM
Hi all,
Bit of a problem that I hope someone can help with. I would like to allow traffic from our internal network through the external network. I can’t access internet from internal network but I can access form external network. I have the following configuration
ASA Version 8.4(2)
!
hostname BNUB-FW
enable password otJaxP2LrPGCkYkU encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface GigabitEthernet0/0
nameif Ext
security-level 0
ip address 192.168.100.52 255.255.255.248
!
interface GigabitEthernet0/1
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/2
shutdown
nameif DMZ
security-level 50
ip address 192.168.100.59 255.255.255.248
!
interface GigabitEthernet0/3
nameif Int
security-level 100
ip address 192.168.0.1 255.255.255.0
!
interface Management0/0
nameif management
security-level 100
ip address 192.168.1.52 255.255.255.0
management-only
!
ftp mode passive
dns domain-lookup Ext
dns server-group DefaultDNS
name-server 209.244.0.3
name-server 208.67.222.222
object network Int-Mail
host 192.168.1.82
object network Traveler
host 192.168.100.58
object network lan
subnet 192.168.0.0 255.255.0.0
pager lines 24
logging asdm informational
mtu Ext 1500
mtu DMZ 1500
mtu Int 1500
mtu management 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
icmp permit any Int
no asdm history enable
arp timeout 14400
route Ext 0.0.0.0 0.0.0.0 192.168.100.49 1
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
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
http server enable
http 192.168.1.0 255.255.255.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
telnet timeout 5
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics port
threat-detection statistics protocol
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
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 rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:f97be74fde0dc1920858b41a80838b49
: end
09-13-2012 07:15 AM
Is the device 192.168.100.49 doing the NAT to the Internet?
Does this device have a route to 192.168.0.0/24 with a next-hop of 192.168.100.52?
--
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09-13-2012 08:23 AM
No there is no Nat. we can packet trace from asa internal to internet without a problem and we can ping our gateway from the asa.
09-13-2012 08:28 AM
Well, somewhere has to be a NAT if your external interface uses a private IP ...
But what's witch the routes? Have all devices between the ASA and your internet-router a route back to the internal network?
--
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09-13-2012 09:01 AM
Hi sorry about the confusion, we have replaced dumy ip's on our config (with the exception of internal interface) so that we would not post our actual ip's but the rest of the config is exactly as is on our asa, we are using a static public ip from our ISP provider. This's a new setup we have a small switch between our laptop and the internal interface in our labtop we have set an ip address of 192.168.0.2 and gateway of 192.168.0.1(asa). i can ping internal interface of asa.
09-13-2012 09:22 AM
Then you have to setup NAT on the ASA. One way to configure that is the following:
nat (any,Ext) after-auto source dynamic any interface
--
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09-13-2012 10:07 AM
Thanks for your help and prompt response,it worked, can you also please help in allowing ping from internal to ext interface.
09-13-2012 10:22 AM
policy-map global_policy
class inspection_default
inspect icmp
--
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09-13-2012 10:40 AM
thanks i will try this in the morning.
09-17-2012 12:14 PM
hi the command worked by allowing me to ping ext interface but not dmz, but more importantly i'm still having issues with nating i want to allow a server on my Internal to communicate with a server on my dmz over a specific port (i.e 5555) and vice versa from outside i can connect to the dmz server over https. here is my config, i have only replaced the ips with dumy ip's
ASA Version 8.4(2)
!
hostname Cisco-FW
enable password otJaxP2LrPGCkYkU encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface GigabitEthernet0/0
nameif Ext
security-level 0
ip address 212.1.1.2 255.255.255.240
!
interface GigabitEthernet0/1
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/2
nameif DMZ
security-level 50
ip address 192.168.2.10 255.255.255.248
!
interface GigabitEthernet0/3
nameif Int
security-level 100
ip address 10.168.1.1 255.255.255.0
!
interface Management0/0
nameif management
security-level 100
ip address 10.168.1.15 252 255.255.255.0
management-only
!
ftp mode passive
dns domain-lookup Ext
dns server-group DefaultDNS
name-server 2.2.2.2
name-server 3.3.3.3
object network Dmz_outside
subnet 0.0.0.0 0.0.0.0
object network Traveler-from-outside
host 192.168.2.1
object network Traveler-from-inside
host 192.168.2.1
access-list OutsidetoDMZ extended permit tcp any host 192.168.2.1 eq https
access-list DMZ_access_in extended permit tcp object Int-Mail host 192.168.2.1 eq lotusnotes
pager lines 24
logging asdm informational
mtu Ext 1500
mtu DMZ 1500
mtu Int 1500
mtu management 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
icmp permit any Int
no asdm history enable
arp timeout 14400
!
object network Dmz_outside
nat (DMZ,Ext) dynamic interface
object network Traveler-from-outside
nat (DMZ,Ext) static 212.1.1.3 service tcp https https
object network Traveler-from-inside
nat (DMZ,Int) static 212.1.1.3 service tcp https https
!
nat (any,Ext) after-auto source dynamic any interface
access-group OutsidetoDMZ in interface Ext
access-group DMZ_access_in in interface DMZ
route Ext 0.0.0.0 0.0.0.0 212.1.1.1 1
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
timeout floating-conn 0:00:00
dynamic-access-policy-record DfltAccessPolicy
user-identity default-domain LOCAL
http server enable
http 192.168.1.0 255.255.255.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart
telnet timeout 5
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics port
threat-detection statistics protocol
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
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 rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
inspect icmp
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:6afc555ee13fa87dd87a61a1f774beed
: end
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