How can I use a different static DHCP range on a Linksys router?

Young Ko October 25, 2012

When I setup a wireless router, can I use other static IP addresses such as 105.66.x.x. instead of default static DHCP starting from 192.168.1.x?

My understanding is that a Linksys router allows users to use static DHCP ranging from to But my customer wants to use their company’s own static IP of 105.66.x.x.

How do I set a wireless router to support the specific demand? Or what should I do to display users’ private addresses on their device/computer? Do I need a kind of IP mapping program?

Hopefully someone can help me. Thanks!

  1. Larson Thorpe
    October 25, 2012 at 8:01 pm

    I agree with Bruce Epper in that the address range your talking about is publicly internet routable and will possibly cause problems with computers on that network. However, if you still want to do it, here's a rough explination as to how. Linksys routers have a default web configuration page at open that in any browser and enter the login credentals the default is usually user: admin password:admin. change the default dhcp address to the one you want as well as the subnet, unless you want to do subnetting on the network. then you can change the default start and stop range for dhcp usually only like this, using as an example network. save the changes at the bottom of the page. Then either unconnect and reconnect the device your using to configure the router or release and renew the ip address through command prompt. As to displaying the ip address on a windows 7 machine either open command prompt and enter ipconfig /all or click on the network symbol on the task bar and open network and sharing center, from there click on the adapter connected to the router then click details and look for the ipv4 address. It should be with in the range you told the router to distribute.

  2. illegal3alien
    October 25, 2012 at 7:59 pm

    If your customer has a block of address assigned to them (public addresses) they shouldn't be using a linksys router. Otherwise Bruce is right, those simply won't work.
    Class A Private
    Class B Private
    Class C Private

    If the router won't let you adjust subnet masks/IPs correctly you can sometimes do this through telnet/ssh. You may need to ssh in right after the router comes on to get access. If it's running busybox you can use "nvram show" to show all settings. You'll probably want to copy/paste this to notepad. You can then use Ctrl-F to find the correct setting and change it using "nvram set setting=value" and save that using "nvram commit"

    You may need to restart the router to update the settings. You can use that procedure to change any setting the router can handle that the GUI won't let you change.

  3. Scott Pickett
    October 25, 2012 at 5:33 pm

    Like Bruce said... there are only a few PRIVATE IP address ranges.
    Class A is 10.x.x.x
    Class B is 172.16.x.x - 172.31.x.x
    Class C is 192.168.x.x
    The reason most routers default to a 192.168.x.x range is that a normal class C range has 254 useable IP addresses in it and that is more than enough for anyone buying a Linksys router.
    Any IP scheme out the ones listed above is a PUBLIC IP address which means it is route-able on the internet. The biggest reason to not do this is what happens when you try to reach a website whose server address is a 105.66.x.x??? Your Linksys will point that traffic back into your network creating a awesome loop that will likely lock up your router. Now if your ISP has given you a PUBLIC block of IP addresses that is large enough to assign one to every device in the network then you could do that. You accept some large risks and you better have an awesome firewall in place but we have done this at a few offices we work with. It is pretty uncommon though because leasing a large block of public IPs is a monthly cost that can be pretty steep. If you have any doubt about the need for PUBLIC IP addresses but suggestion to you is save yourself a ton of headache and just change their address scheme now. Give them a 10.105.66.x and subnet of and that will give you 253 useable addresses assuming .1 is the router and .255 is your broadcast address.

  4. ha14
    October 25, 2012 at 2:37 pm

    If to use a private IP, you need to configure routers all the way to the outside to make server connectable from the outside. if router's external address is from a private range, you depend on your ISP to configure their routers for you. If your router's external address is not from a private range (is a "real" IP), you need to configure only your own router.

    perhaps dynamic DNS services can help

  5. Anonymous
    October 25, 2012 at 1:27 am

    First, those are not static addresses. A static address does not change at all and are normally used for servers, printers, managed network devices, etc. The whole point of DHCP is to have Dynamic (hence the name) addresses rather that static addresses on all machines.Second, the IP address range of 105.x.x.x is internet routable and should not be used on a private network. What will happen here is address conflicts. If a user attempts to reach a web server out in the world that happens to have that address, they will not be able to get to it since their local systems will believe it to be a local server instead of a machine out in the world. Because of this, their internal addressing scheme should be reconfigured to use either 10.x.x.x, 172.16.x.x - 172.31.x.x, or 192.168.x.x address ranges.If the customer still wants to do something so inane, you can always go into the router settings and change the start and end address ranges for DHCP. The exact procedure may differ based on the specific router model and firmware version, so check your documentation. I have yet to see any router where this cannot be changed (in over 25 years of doing this stuff).