01-10-2008 06:46 PM - edited 03-09-2019 07:50 PM
I just hooked up a newly configured ASA5505 for a customer.
I have connectivity to the internet (can ping any external IP, can connect to other VPN's, etc), but can't view webpages.
DNS issue, right?
They have a single server which handles DNS/WINS/DHCP, etc. The ip of this server is 10.0.0.17. When I do 'ipconfig' on my computer, it shows the server address for all 3 -- both on the new setup and old.
Their old setup had 2 DNS server addresses (external ones), and I have added them to my ASA config, but it doesn't give them to the actual interface. When I apply these DNS settings *manually*, everything works, including webpages.
I'm really stumped at the moment.
Where in my ASA configuration should I be applying the external DNS server addresses? In the group policy or on my default DNS?
PS: For some reason I'm able to access the www.cisco.com site, even when no other webpages work. Right now I'm using my laptop with the settings given from the ASA, I can't access ANY page except Cisco.com and its subpages (including forums, obviously).
Config Below:
01-10-2008 06:47 PM
hostname **HIDDEN**
domain-name default.domain.invalid
enable password xxx
names
!
interface Vlan1
description Inside Interface - IP:10.0.0.1/24
nameif inside
security-level 100
ip address 10.0.0.1 255.255.255.0
!
interface Vlan2
description Outside Interface - IP:**HIDDEN**
nameif outside
security-level 0
ip address **HIDDEN** 255.255.255.252
!
interface Ethernet0/0
description Outside Network Interface
switchport access vlan 2
!
interface Ethernet0/1
description Inside Network Interface
!
interface Ethernet0/2
!
interface Ethernet0/3
shutdown
!
interface Ethernet0/4
shutdown
!
interface Ethernet0/5
shutdown
!
interface Ethernet0/6
shutdown
!
interface Ethernet0/7
shutdown
!
passwd qS2sCdhBJFJbWywn encrypted
ftp mode passive
clock timezone PST -8
clock summer-time PDT recurring
dns domain-lookup inside
dns domain-lookup outside
dns server-group DefaultDNS
domain-name default.domain.invalid
object-group service ACCEPTED_PORTS tcp
port-object eq telnet
port-object eq ssh
port-object eq smtp
port-object eq 51
port-object eq 500
port-object eq pop3
access-list ACL_INSIDE_GOING_OUT extended permit ip any any
access-list ACL_INSIDE_GOING_OUT extended deny ip any any
access-list ACL_OUT_COMING_IN extended permit tcp any host **HIDDEN** object-group ACCEPTED_PORTS
access-list VPN_TUNNELED_NETWORKS remark List of destination networks to tunnel data to.
access-list VPN_TUNNELED_NETWORKS standard permit 10.0.0.0 255.255.255.0
pager lines 24
logging enable
logging asdm warnings
mtu inside 1500
mtu outside 1500
ip local pool VPN_POOL 10.0.3.10-10.0.3.250 mask 255.255.255.0
icmp unreachable rate-limit 1 burst-size 1
icmp permit any inside
icmp permit any outside
asdm image disk0:/asdm-523.bin
asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
static (inside,outside)**HIDDEN** 10.0.0.17 netmask 255.255.255.255
access-group ACL_INSIDE_GOING_OUT in interface inside
access-group ACL_OUT_COMING_IN in interface outside
route inside 10.0.0.0 255.255.255.0 10.0.0.2 1
route outside 0.0.0.0 0.0.0.0 **HIDDEN** 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 uauth 1:00:00 absolute
aaa authentication ssh console LOCAL
aaa authentication telnet console LOCAL
aaa authentication enable console LOCAL
aaa authentication http console LOCAL
aaa authentication serial console LOCAL
http server enable
http **HIDDEN** 255.255.255.255 outside
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 dynamic-map OUTSIDE_DYN_MAP 30 set pfs
crypto dynamic-map OUTSIDE_DYN_MAP 30 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 inside
crypto isakmp enable outside
crypto isakmp policy 30
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
crypto isakmp nat-traversal 20
no vpn-addr-assign aaa
no vpn-addr-assign dhcp
telnet **HIDDEN** 255.255.255.255 outside
telnet timeout 5
ssh 10.0.0.0 255.255.255.0 inside
ssh **HIDDEN** 255.255.255.255 outside
ssh timeout 5
ssh version 2
console timeout 30
dhcpd auto_config outside
!
!
class-map inspection_default
match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
parameters
message-length maximum 512
01-10-2008 06:47 PM
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
!
service-policy global_policy global
group-policy DfltGrpPolicy attributes
banner none
wins-server none
dns-server none
dhcp-network-scope none
vpn-access-hours none
vpn-simultaneous-logins 10
vpn-idle-timeout 30
vpn-session-timeout none
vpn-filter none
vpn-tunnel-protocol IPSec l2tp-ipsec webvpn
password-storage disable
ip-comp disable
re-xauth disable
group-lock none
pfs disable
ipsec-udp enable
ipsec-udp-port 10000
split-tunnel-policy tunnelall
split-tunnel-network-list none
default-domain none
split-dns none
intercept-dhcp 255.255.255.255 disable
secure-unit-authentication disable
user-authentication disable
user-authentication-idle-timeout 30
ip-phone-bypass disable
leap-bypass disable
nem disable
backup-servers keep-client-config
msie-proxy server none
msie-proxy method no-modify
msie-proxy except-list none
msie-proxy local-bypass disable
nac disable
nac-sq-period 300
nac-reval-period 36000
nac-default-acl none
address-pools none
smartcard-removal-disconnect enable
client-firewall none
client-access-rule none
webvpn
functions url-entry
html-content-filter none
homepage none
keep-alive-ignore 4
http-comp gzip
filter none
url-list none
customization value DfltCustomization
port-forward none
port-forward-name value Application Access
sso-server none
deny-message value Login was successful, but because certain criteria have not been met or due to some specific group policy, you do not have permission to use any of the VPN features. Contact your IT administrator for more information
svc none
svc keep-installer installed
svc keepalive none
svc rekey time none
svc rekey method none
svc dpd-interval client none
svc dpd-interval gateway none
svc compression deflate
group-policy **HIDDEN**_VPN internal
group-policy **HIDDEN**_VPN attributes
vpn-tunnel-protocol IPSec
split-tunnel-policy tunnelspecified
split-tunnel-network-list value VPN_TUNNELED_NETWORKS
default-domain value **HIDDEN**
address-pools value VPN_POOL
tunnel-group **HIDDEN**_TUNNEL type ipsec-ra
tunnel-group **HIDDEN**_TUNNEL general-attributes
address-pool VPN_POOL
default-group-policy **HIDDEN**_VPN
tunnel-group **HIDDEN**_TUNNEL ipsec-attributes
pre-shared-key *
prompt hostname context
Cryptochecksum:xxx
01-10-2008 06:54 PM
Also,
E0/0 is outside (modem)
E0/1 is to the switch (which leads to all hosts including this PC)
E0/2 is to the server (on the same vlan as E0/1)
Oddly enough, this PC can ping the external gateway, but the server cannot. Both can ping the internal gateway (the ASA, 10.0.0.1)
01-10-2008 07:49 PM
Hi, I think you might
option 1: configure DNS forwarding on that server, followed is a link how to do that:
http://www.petri.co.il/configure_dns_forwarding.htm
All DNS request by DHCP client will be sent to this server, then this server forward it to ISP DNS server to resolve.
option 2: configure on DHCP server , assign your ISP's DNS server as your client DNS, this way all client DNS request will be sent to external name server to resolve.
You don't need to configure DNS server on ASA, that's for ASA itself to resolve domain name.
Hope this help , if so pls rate
01-10-2008 08:11 PM
Forwarding is already enabled on the server.
I have changed my config a little, and pages are loading, but extremely slow....
01-10-2008 11:00 PM
I realized that I didn't need the static NAT statement so I deleted it. Once I did this, the server could then ping external IP's... Why?
Webpages still acting strangely. They load VERY slowly, then all of a sudden will be fine. Still confused.
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