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comp.security.firewalls archive

Cisco

From: <jamesp010@hotmail.com>
Date: Wed Nov 23 2005 - 03:27:35 CET

Hi,

I have a static IP address from my ISP. I also have a router with a
built in Modem so I plug the router into the telephone line. If I make
a direct connection from my router to my PC with the following
addresses on my PC everything works fine, I get a connection to the
internet (can view webpages):

IP: 194.97.248.40
Subnet: 255.255.255.250
Default Gateway: 194.97.248.39

Preferred DNS : 193.167.64.5
Alternate DNS : 194.97.230.30

As soon as I connect my Cisco 501 PIX in between the PC and the router,
I don't get any internet connection. Here are the steps I am
following to configure the firewall, so please guide me where I am
going wrong:

I start the PDM by going to https://192.168.1.1/startup.html

Once started and authenticated get the Basic Configuration and I leave
the default values ( PIX Host Name = pixfirewall, Domain Name:
ciscopix.com)

On the next page "Outside Interface Configuration" I leave the
"Speed to Auto" and I select "static IP address" and input the
following details IP 194.97.248.40, Subnet Mask: 255.255.255.250 and
Default Gateway: 194.97.248.39

On the next page I leave the remote VPN page empty

On the next page I also leave the Auto update Configuration empty

On the next page "Other Interfaces Configuration I can see the Inside
and outside interface settings and the inside has a security level of
100 and the outside has 0.

On the next page "NAT and PAT Configuration" I select "do not
translate any addresses.

On the next page I disable the DHCP because I can allocate a specific
IP for the PC connecting to the Firewall.

After applying all these setting and saving them. I specify TCP/IP for
my PC with the following addresses:

IP: 192.168.1.10
Subnet Mask: 255.255.255.0
Default Gateway : 192.168.1.1

I try to connect to the internet but I will not let me connect. For
some reason Skype is able to connect which is quite strange.

Do I need to configure anything more? Why does it not allow me to
connect to the internet?

When I remove the firewall I am getting a connection. Please can you
guide me?

Thank you,
James
Received on Sat Dec 3 04:17:59 2005