Click Next to begin the Express Wizard Setup

1. Click Next to begin the Express Wizard Setup

2. Pick a name for the router Enter the customers local domain name Set the username Se the password to whatever you want Make this the same as the above password Click next

3. Configure the IP address of the inside interface and set its subnet mask. Make sure you think about this carefully. It can be a lot of work to change this address later due to the complexity of access lists. Click Next

4. If you want the router to act as a DHCP server, fill out this section. Don’t forget to fill out the DNS section. Click next

5. Cisco 831 Router SDM Express • For customers with a static IP address from Comcast or Verizon the setup should look like this

6. Set the Address Type to Static Enter their static address Don’t forget the correct subnet mask Click Next

7. Make the Default Route the Gateway Address given by the ISP Make sure NAT is Enabled Click Next

8. Click here to enable PPoE Make sure the Address Type is set to IP Negotiated (NOT DHCP) For Verizon use CHAP Enter the verizon PPoE username and password Click Next

9. The default route is the interface for Verizon PPoE Make sure NAT is Enabled Click Next

10. Cisco 831 Router SDM Express • For customers with a Dynamic IP address from some other ISP or with an ordinary Comcast Cable modem (not a SMC) the setup should look like this • This is really not a very common setup

11. Set the address type to Dynamic Click Next

12. Make sure NAT is enabled Click Next

13. Cisco 831 Router SDM Express • Now back to the settings common to all setups

14. Make sure you turn on the firewall. Things will not work correctly without it. Click Next

15. Make sure all The options are selected Click Next

16. This window will open and the OK will be grayed out. DO NOT CLOSE ANYTHING! Wait for the OK to be clickable. Click OK If you are using a PPoE DSL connection or another type that has a Dynamic IP address, you have to answer YES! Click Finish

17. Cisco 831 Router SDM Express • After Clicking OK the SDM Express wizard will close and the router will begin a reboot. • The reboot will take more than 60 seconds to complete. • DO NOT INTERUPT IT. Wait for it to fully reboot and load. • When it is done, you can load and access the SDM Express again at the new IP address.

18. If something goes wrong and you need to start over, Reset to Factory Defaults If you have installed the SDM locally from CD, you can click her to open it

19. Cisco 831 Router SDM Express • You should now have access to the Internet. • To configure open ports, we need to use the SDM. • It can be downloaded from Cisco or Installed from CDROM. • It also requires Java and Flash.

20. The First step is to configure the NAT entry

21. This is the default NAT entry used for internet traffic DON’T CHANGE IT! Instead, we will add a NAT entry

22. The type is static We are translating our inside address to an outside port Put the internal host address here. There is no need to enter the netmask (it defaults to exclusive) The translated interface is the outside interface Ethernet1 EVERY PORT FORWARD IS A REDIRECTION! For SMTP they would both be 25. For port redirection, the original port is internal, the translated is the external

23. We will be dealing with incoming traffic, so we need to select the returning traffic bullet

24. In most cases, we want to click add and select “Insert before” Enter a description and include your name so we can tell you modified it. Of course we want to permit traffic For most cases the source and destination should be set to any IP address. The nat entry determines access. These ACLs are applied to this interface The source port should remain “ANY” the destination port should match your translated port

25. Don’t forget to apply the changes!