Cisco ASA 5505 - cannot connect to the internet from the inside network

Posted on 2010-08-25
Last Modified: 2012-05-10
I am a noob to Cisco IOS and cannot get the PC on the inside network to connect to the internet. There is a Trendnet router that will be replaced by a Cisco 5505.  Here are the settings the ISP gave me that are the current settings of the Trendnet.  static ip:    mask:  gateway:  DNS: and

I have DHCP turned on inside and have set the outside vlan set to the static ip the ISP gave me.

The config on the ASA 5505 is:

ASA Version 7.2(4)
hostname hangerhall
domain-name default.domain.invalid
enable password 8Ry2YjIyt7RRXU24 encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
interface Vlan1
 nameif inside
 security-level 100
 ip address
interface Vlan2
 nameif outside
 security-level 0
 ip address
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
ftp mode passive
dns domain-lookup inside
dns server-group DefaultDNS
 domain-name default.domain.invalid
pager lines 24
logging asdm informational
mtu inside 1500
mtu outside 1500
icmp unreachable rate-limit 1 burst-size 1
asdm image disk0:/asdm-524.bin
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1
route outside 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
http server enable
http inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
telnet timeout 30
ssh timeout 5
console timeout 0
dhcpd dns
dhcpd address inside
dhcpd enable inside

username admin password gBAHRIjXeUXu2sLz encrypted
class-map inspection_default
 match default-inspection-traffic
policy-map type inspect dns preset_dns_map
  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
service-policy global_policy global
prompt hostname context
: end

Thanks for your help.
Question by:jerminate

Expert Comment

ID: 33526533
You need to set an interface to inside for example run.

conf t

interface Ethernet0/1
 switchport access vlan 1

Expert Comment

ID: 33526593
Sorry i dont know what i was thinking Vlan 1 is you native vlan. I do not see anything in the config that pops out at me as missing or wrong. Are you running ASDM? If so can you pull some logs of what you see when trying to connect from the inside?
LVL 14

Expert Comment

ID: 33528049
how u are testing the internet ?
can u able to reach from PIX.

ICMP will be blocked by default ,so try the below commands

policy-map global_policy
 class inspection_default
inspect ICMP

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.


Accepted Solution

nwhitaker2 earned 500 total points
ID: 33530895
Try putting the IP addresses that the ISP gave you on your laptop computer and see if you can get out to the Internet with just those IP addresses.  If that works, then you know you can get out with those IP addresses and that is not the problem.  I did not see where you have DNS defined either, so you should be able to ping outside IP addresses from the ASA, asuming that the test above worked, but it will not resolve names until you set this up.  Use the below as an example to do this.  Use the domain name you used on the ASA, it can be anything you want, it does not have to be the domain of your network.
Conf t
dns domain-lookup inside
dns domain-lookup outside
dns server-group DefaultDNS
 domain-name yourdomain
dns server-group dnslookup
 domain-name yourdomain

Author Comment

ID: 33535204
Thank you for your help...  I was wondering about the DNS and was not sure how to get the requests from the inside network to the outside  ISP DNS.  I will try that and get back to you.

Author Comment

ID: 33770865
It was a DNS issue.

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Overview The Cisco PIX 501, PIX 506e, ASA 5505 and ASA 5510 (most if not all of this information will be relevant to the PIX 515e but I do not have a working configuration handy to verify the validity) are primarily used within small to medium busi…
From Cisco ASA version 8.3, the Network Address Translation (NAT) configuration has been completely redesigned and it may be helpful to have the syntax configuration for both at a glance. You may as well want to read official Cisco published AS…
This tutorial demonstrates a quick way of adding group price to multiple Magento products.
You have products, that come in variants and want to set different prices for them? Watch this micro tutorial that describes how to configure prices for Magento super attributes. Assigning simple products to configurable: We assigned simple products…

932 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now