VLANS created on Switch Do not Access Internet

[Garrison Gurule]

I have a Cisco 1841 integrated router I am working with.

I created a VLAN on the switch and a DHCP scope attached to that VLAN.

Computers connected to the VLAN:

• get IP addresses, DNS, and DHCP 
• can access all of my internal network;

However, they cannot access the internet....

Do I need to configure that VLAN on the router in order to access the internet?

If so how?

what are the steps, commands, and logic?

Thank you for the help

[Julio E. Moisa]

Hi

You need to verify the configuration on your router and you will see something like:

ip nat inside source list INTERNAL-NETS interface f0/0 overload

so your ACL is named INTERNAL-NETS. Once you have identified your ACL you just need to add the new subnet into that:

ip access-list standard INTERNAL-NETS
permit 192.168.10.0 0.0.0.255
permit 192.168.20.0 0.0.0.255

Now in order to know if your router has an entry for the new subnet into the routing table you need to do:

router#: show ip route <new subnet>  

example:

show ip route 192.168.10.0

Then you will see how the router is knowing this network or if the network is not included.