PIX 501 and Internet Access

Unanswered Question

My network is very simple, like this: A DSL Modem is connected to a Cisco PIX 501 firewall/router, and a computer is connected to this firewall.

Now this PIX 501 box has two interfaces: Inside ( and the netwroked PC ( The outside interface is set to DHCP to be dynamically assigned an IP by the ISP's DNS server (

My networked PC (running Windows XP) is configured with an static IP (, default Gateway ( which is the PIX 501), and the DNS IP ( which is the ISP's DNS Server).

But I can NOT access the internet. I can Ping (the inside interface) but not the outside (

What am I missing and what should I do?



  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
m-haddad Mon, 04/02/2007 - 11:52
User Badges:
  • Silver, 250 points or more

Did you configure nat on the PIX?

You need to add the below:

Global (outside) 1 interface

nat (inside) 1

Remark: Try to use a public DNS such as

Let me know if this solves your issue,

Appreciate your rating,


jmistich Mon, 04/02/2007 - 12:42
User Badges:


You will have to setup NAT so that all packets going from inside to outside get translated.


CCIE 7536


This Discussion