What is NAT? It stands for Network Address Translation. It means that we can have a public IP outside the Cisco Firewall, and it will route traffic inside to the internal address we select. Of course, because it’s a firewall, we need to tell the ASA5055 what traffic to allow through the firewall to the [...]

If you haven’t done this yet or lack faith in your NAT setup, I have also posted instructions on how to set up a NAT on the Cisco ASA 5505. After setting up my Cisco ASA5505 to perform NAT (Network Address Translation) I wasn’t able to access the server from outside the firewall. I also [...]

If you have been mucking around in your Cisco ASA5505 and want to return to factory defaults using the ASDM management software, it’s pretty easy. If you can’t use the ASDM, I have also have a write up for Resetting the Cisco asa 5505 Using the Console. Click the “Wizards” drop down menu and select [...]

This walkthrough will describe how to use your Cisco ASA5505 as a VPN server for a remote client. The remote client doe not need to have an 5505 as a VPN endpoint, it only needs to have the Cisco VPN Client software installed. To configure the ASA5505, first log into it using the Cisco ASDM. [...]

There’s probably a ‘proper’ way Change the IP address of your Cisco asa5505 endpoints. I have no idea what it is. Why does Cisco make routine maintenance tasks difficult? Oh well. Here’s the way I do it, which I think is really straightforward and easy. It’s basically these steps: Download the complete configuration text file [...]

You should set a password on your Cisco ASA 5505 even if you don’t have remote management set up. If a computer inside your network gets hacked, it could be used to gain access to the firewall. To set the enable password on your Cisco ASA 5505: Get into the command line. I prefer using [...]

Even your Cisco ASA5505 can have a DMZ, though not a full one. With the base license you can create another interface and vlan, but you must restrict traffic from that interface to another. Below I’m going to tell you how to set up a DMZ on your Cisco ASA5505. All I needed for my [...]

I kind of hate you Cisco. I have a firewall. It’s good practice to set that device to have a static IP. If you do this using the ASDM, systems behind the firewall will suddenly not be able to connect to the internet. At all. This is because you don’t have a route to the [...]

If you are like me, you tend to click things just to see how they work. Sometimes they don’t work. At all. If you’ve mucked up the IP, vlan, etc settings and the Cisco ASDM can’t get into the device, it’s time for more desperate measures. If you can get into the ASDM, it is [...]