We replaced a Meraki MX with a Cisco ASA, and I'm unable to reach the public IPs of servers behind our firewall now. The server has working Internet access. All packet tracer runs show successful NATing and are allowed. The firewall is open to limit the problem while testing.
I'm assuming it's a misconfigured NAT rule or another option I've forgotten to enable.
I've been at it for hours, and I can't seem to ping the public IP nor access it externally for services.
The ASA is directly behind the ISP modem. The server IP is 192.168.108.44 NAT'd to 5x.xx.xx.53.
Any help is greatly appreciated.
ISP modem settings:
Internet Settings
Gateway MAC Address 78:CD:8E:C2:D2:58
WAN MAC Address 78:CD:8E:C2:D2:5B
WAN DHCP IP Address 98.204.5.208
WAN DHCP IPv6 Address ::/64
WAN DHCP IPv6 DNS (primary) ::
WAN DHCP IPv6 DNS (secondary) ::
WAN DHCP Subnet Mask 255.255.248.0
WAN DHCP Default Gateway 98.204.0.1
WAN Internet IP Address 50.xx.xx.62
DNS (primary) 75.75.75.75
DNS (secondary) 75.75.76.76
DHCP Time Remaining 86h:12m:46s
Date Oct-4-2017
Static IP Block 50.xx.xx.62/28
ASA 5512 Config:
Result of the command: "sh run"
: Saved
:
: Serial Number: FCH1841718M
: Hardware: ASA5512, 4096 MB RAM, CPU Clarkdale 2792 MHz, 1 CPU (2 cores)
:
ASA Version 9.6(3)1
!
hostname ciscoasa
enable password lsiIw5sJErKSQdQv encrypted
xlate per-session deny tcp any4 any4
xlate per-session deny tcp any4 any6
xlate per-session deny tcp any6 any4
xlate per-session deny tcp any6 any6
xlate per-session deny udp any4 any4 eq domain
xlate per-session deny udp any4 any6 eq domain
xlate per-session deny udp any6 any4 eq domain
xlate per-session deny udp any6 any6 eq domain
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface GigabitEthernet0/0
description Uplink To ComRTR
nameif outside
security-level 100
ip address 5x.xx.xx.50 255.255.255.240
!
interface GigabitEthernet0/1
description Link To 1941
nameif inside
security-level 100
ip address 172.17.25.1 255.255.255.0
!
interface GigabitEthernet0/2
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/3
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/4
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet0/5
shutdown
no nameif
no security-level
no ip address
!
interface Management0/0
management-only
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet1/0
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet1/1
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet1/2
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet1/3
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet1/4
shutdown
no nameif
no security-level
no ip address
!
interface GigabitEthernet1/5
shutdown
no nameif
no security-level
no ip address
!
boot system disk0:/asa963-1-smp-k8.bin
ftp mode passive
clock timezone EST -5
clock summer-time EDT recurring
same-security-traffic permit inter-interface
same-security-traffic permit intra-interface
object network inside-dmz-network
subnet 172.17.25.0 255.255.255.192
description inside dmz
object network milestone-corporate-internal-ip
host 192.168.108.44
object network milestone-corporate-external-ip
host 5x.xx.xx.53
object network user-network
subnet 192.168.128.0 255.255.255.0
object network server-network
subnet 192.168.108.0 255.255.255.0
object network transit-network
subnet 192.168.118.0 255.255.255.0
object-group protocol DM_INLINE_PROTOCOL_1
protocol-object ip
protocol-object icmp
object-group protocol DM_INLINE_PROTOCOL_2
protocol-object ip
protocol-object icmp
object-group protocol DM_INLINE_PROTOCOL_3
protocol-object ip
protocol-object icmp
object-group protocol DM_INLINE_PROTOCOL_4
protocol-object ip
protocol-object icmp
access-list inside_access_in extended permit object-group DM_INLINE_PROTOCOL_1 any any
access-list outside_access_in extended permit object-group DM_INLINE_PROTOCOL_2 any any
access-list inside_access_out extended permit object-group DM_INLINE_PROTOCOL_3 any any
access-list outside_access_out extended permit object-group DM_INLINE_PROTOCOL_4 any any
pager lines 24
mtu outside 1500
mtu inside 1500
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-781-150.bin
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
arp rate-limit 8192
nat (outside,outside) source static any any destination static milestone-corporate-external-ip milestone-corporate-internal-ip
nat (inside,outside) source static milestone-corporate-internal-ip milestone-corporate-external-ip dns
nat (inside,outside) source dynamic inside-dmz-network interface
nat (inside,outside) source dynamic user-network interface
nat (inside,outside) source dynamic server-network interface
nat (inside,outside) source dynamic transit-network interface
nat (inside,outside) source dynamic any interface
nat (any,any) source static any any
access-group outside_access_in in interface outside
access-group outside_access_out out interface outside
access-group inside_access_in in interface inside
access-group inside_access_out out interface inside
router ospf 1
network 10.1.10.0 255.255.255.0 area 0
network 172.17.25.0 255.255.255.192 area 0
area 0
log-adj-changes
redistribute static metric 10 metric-type 1 subnets
!
route outside 0.0.0.0 0.0.0.0 5x.xx.xx.62 200
route inside 192.168.108.0 255.255.255.0 172.17.25.2 1
route inside 192.168.118.0 255.255.255.0 172.17.25.2 1
route inside 192.168.128.0 255.255.255.0 172.17.25.2 1
route inside 192.168.226.0 255.255.255.0 172.17.25.3 1
timeout xlate 3:00:00
timeout pat-xlate 0:00:30
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 sctp 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
timeout conn-holddown 0:00:15
user-identity default-domain LOCAL
aaa authentication ssh console LOCAL
http server enable
http 192.168.128.0 255.255.255.0 inside
http 10.2.10.0 255.255.255.0 inside
http 172.17.25.0 255.255.255.192 inside
no snmp-server location
no snmp-server contact
crypto ipsec security-association pmtu-aging infinite
crypto ca trustpool policy
telnet timeout 5
ssh stricthostkeycheck
ssh 192.168.128.0 255.255.255.0 inside
ssh 172.17.25.0 255.255.255.192 inside
ssh timeout 60
ssh key-exchange group dh-group1-sha1
console timeout 0
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 129.6.15.30 source outside prefer
ntp server 129.6.15.28 source outside
dynamic-access-policy-record DfltAccessPolicy
username bcooper password bESD75/eXenKs8C2 encrypted privilege 15
username xadmin password R.MXJOsjk9M6sb0Y encrypted privilege 15
!
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
no tcp-inspection
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect ip-options
inspect netbios
inspect rsh
inspect rtsp
inspect skinny
inspect esmtp
inspect sqlnet
inspect sunrpc
inspect tftp
inspect sip
inspect xdmcp
inspect icmp
inspect icmp error
!
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
call-home
profile CiscoTAC-1
no active
destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService
destination address email callhome@cisco.com
destination transport-method http
subscribe-to-alert-group diagnostic
subscribe-to-alert-group environment
subscribe-to-alert-group inventory periodic monthly 9
subscribe-to-alert-group configuration periodic monthly 9
subscribe-to-alert-group telemetry periodic daily
Cryptochecksum:9b6d5d742ef4bdc41a63b27038125408
: end
Best Answer
For the record, my acl-internet-out:
There are no ACLs on the "inside" interfaces.
You can define an object for the services to be exposed instead of listing them one by one in the ACL -- ASDM (GUI) will do that for you, if you enter more than one service in the box. My personal preference is line-by-line to have hit counts per service.
Remember, NAT tells the firewall how to rewrite packets. ACLs tell it what to allow or deny.