Unable to resolve DNS behind Cisco ASA 5505
Hello all
I am unable to resolve DNS behind my Cisco ASA 5505. Windows server 2008 r2 is setup as the dhcp server and external dns server is configured as forwarders. Here are my asa config. Anyone know where the problem could be?
I am unable to resolve DNS behind my Cisco ASA 5505. Windows server 2008 r2 is setup as the dhcp server and external dns server is configured as forwarders. Here are my asa config. Anyone know where the problem could be?
Result of the command: "sh conf"
: Saved
: Written by enable_15 at 21:39:48.557 UTC Sun Aug 12 2012
!
ASA Version 8.3(2)
!
hostname XXXFW
domain-name xxxxxx.local
enable password yNew3bgX2gTfsqf/h2uCL encrypted
passwd 2KqQnbfwNI.2KYOU encrypted
names
name 10.26.0.112 proxy
!
interface Vlan1
nameif inside
security-level 100
ip address 10.26.0.1 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
ip address 81.XXX.XXXX.XXX 255.255.255.252
!
interface Vlan3
nameif dmz
security-level 50
ip address dhcp
!
interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
boot system disk0:/asa832-k8.bin
ftp mode passive
dns server-group DefaultDNS
domain-name xxxxxx.local
object network obj-10.26.0.0
subnet 10.26.0.0 255.255.255.0
object network obj-10.10.10.0
subnet 10.10.10.0 255.255.255.128
object network obj-10.230.0.0
subnet 10.230.0.0 255.255.255.0
object network obj-10.26.0.11
host 10.26.0.11
object network obj-10.26.0.13
host 10.26.0.13
object network obj_any
subnet 0.0.0.0 0.0.0.0
object network PPTP-server
host 10.26.0.13
object-group protocol TCPUDP
protocol-object udp
protocol-object tcp
access-list xxxxvpn_splitTunnelAcl standard permit 10.26.0.0 255.255.255.0
access-list inside_nat0_outbound extended permit ip 10.26.0.0 255.255.255.0 10.10.10.0 255.255.255.128
access-list inside_nat0_outbound extended permit ip 10.26.0.0 255.255.255.0 10.230.0.0 255.255.255.0
access-list outside_1_cryptomap extended permit ip 10.26.0.0 255.255.255.0 10.230.0.0 255.255.255.0
access-list outside_access_in extended permit tcp any host 10.26.0.11 eq 3389
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
mtu dmz 1500
ip local pool xxxxpool 10.10.10.30-10.10.10.70 mask 255.255.255.0
ip local pool xxxx10.26.0.150-10.26.0.200 mask 255.255.255.0
no failover
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-634.bin
no asdm history enable
arp timeout 14400
nat (inside,any) source static obj-10.26.0.0 obj-10.26.0.0 destination static obj-10.10.10.0 obj-10.10.10.0 unidirectional
nat (inside,any) source static obj-10.26.0.0 obj-10.26.0.0 destination static obj-10.230.0.0 obj-10.230.0.0 unidirectional
!
object network obj-10.26.0.11
nat (inside,outside) static interface service tcp 3389 3389
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 81.XXX.XXX.XXX 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
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 10.26.0.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac
crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto ipsec df-bit clear-df outside
crypto dynamic-map outside_dyn_map 20 set pfs group1
crypto dynamic-map outside_dyn_map 20 set transform-set ESP-3DES-SHA
crypto map outside_map 1 match address outside_1_cryptomap
crypto map outside_map 1 set pfs
crypto map outside_map 1 set peer xx.XXX.XXX.XXX
crypto map outside_map 1 set transform-set ESP-3DES-SHA
crypto map outside_map 65535 ipsec-isakmp dynamic outside_dyn_map
crypto map outside_map interface outside
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
no crypto isakmp nat-traversal
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd auto_config outside
!
dhcpd address 10.26.0.2-10.26.0.254 inside
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
group-policy xxxxxinternal
group-policy xxxxxxxattributes
wins-server value 10.26.0.12
dns-server value 10.26.0.12
vpn-tunnel-protocol IPSec
split-tunnel-policy tunnelspecified
split-tunnel-network-list value xxxxx_splitTunnelAcl
default-domain value xxxxx.local
username attila password Nc7VToimLfa3Cxth encrypted privilege 0
username attila attributes
vpn-group-policy xxxxx
username knkl password Hb.4ZNcTg6Ketq/w encrypted privilege 0
username knkl attributes
vpn-group-policy xxxxx
username dach password xSyTYr0x4VCsHEv0 encrypted privilege 0
username dach attributes
vpn-group-policy xxxxx
username oyvind password oRUppDFe.1zqh7KY encrypted privilege 0
username oyvind attributes
vpn-group-policy xxxxx
username hagj password rbDKy3hAw01uJJjr encrypted
username hagj attributes
vpn-group-policy xxxxxx
username kare password wOWJstV5SXfLCARX encrypted privilege 0
username kare attributes
vpn-group-policy xxxxxx
username xxxxxpassword SQumpZUsgPFi91GI encrypted privilege 0
username xxxxxattributes
vpn-group-policy xxxxxx
tunnel-group xxxxxtype remote-access
tunnel-group xxxxxxgeneral-attributes
address-pool xxxxx
default-group-policy xxxxxx
tunnel-group xxxxxxipsec-attributes
pre-shared-key *****
tunnel-group 82.xxx.xxx.xxx type ipsec-l2l
tunnel-group 82.xxx.xxx.xxx ipsec-attributes
pre-shared-key *****
!
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum 512
!
prompt hostname context
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
subscribe-to-alert-group configuration periodic monthly
subscribe-to-alert-group telemetry periodic daily
Cryptochecksum:6a95fdad54ff8asgbe2961cc2352b2e2f895
Yeah you have a DNS policy map but you have not got it applied?
issue the following commands
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 sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect icmp
inspect ipsec-pass-thru
inspect ip-options
service-policy global_policy global
issue the following commands
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 sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect icmp
inspect ipsec-pass-thru
inspect ip-options
service-policy global_policy global
ASKER
Thank you for trying to help. unfortunately the commands did not fix the issue :(
Do you have any other tips?
Do you have any other tips?
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the command fixed the issue.
dns packet should come from your inside interface and go outside and be statefully inpect to permit the dns answer back without the need of an access-list in the outside interface.
use the monitoring tab and see the real time log , filter by the ip address or the dns protocol , and try to see if the packet is going through your asa to the internet .