Click Next to begin the Express Wizard Setup

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Click Next to begin the Express Wizard Setup
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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.
Dont forget to fill out the DNS section.
Click next
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Cisco 831 Router SDM Express

• For customers with a static IP address from
  Comcast or Verizon the setup should look like this

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Set the Address Type to Static
Enter their static address
Dont 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
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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

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Set the address type to Dynamic
Click Next
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Make sure NAT is enabled
Click Next
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Cisco 831 Router SDM Express

• Now back to the settings common to all setups

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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
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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
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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.

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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
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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.

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The First step is to configure the NAT entry
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This is the default NAT entry used for internet
traffic DONT CHANGE IT!
Instead, we will add a NAT entry
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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
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We will be dealing with incoming traffic, so we
need to select the returning traffic bullet
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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
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Dont forget to apply the changes!