Guest network DHCP conflict

I get this message and would like to know how to fix the problem. This airport wireless device rejected a DHCP address in the same subnet as its internal DHCP server for the guest network. you should change the DHCP Range for the guest network. How do I do this.
Thank you

Welcome to the discussion area, anthony!
I get this message and would like to know how to fix the problem.
Open AirPort Utility and click on Manual Setup
Click the Internet icon
Click the DHCP tab
The DHCP ranges will be displayed for your Main network (top line) and Guest network (third line). Note the range that your Main network is using, either 10.0, 172.16 or 192.168. Then select a different range for the Guest network.
So for example, if your Main network is using 10.0, then you would select either 172.16 or 192.68 for the Guest network and Update to save your changes.

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Guest Network DHCP

Hi All,
Here's my situation, I have installed 5 Cisco Linksys EA2700 wireless routers in a cascade fashion off of my main switch throughout the building. I have turned off DHCP and NAT since I have a DHCP server assigning IP's. Basically I'm using them as Access Points.
and they are working well!
Now, I would like to advertise the guest network.
When I enable the guest network on one of the routers I do see the SSID. But I cannot connect to the network. It doesn't even prompt me for a password. From my reading it is supposed to give me a 192.168.33.x address, but I don't think it is serving out IP's
Any ideas?
Thanks in advance!

you will be prompted for the guest network password when you open a web browser. once you entered the correct password, your device will then be assigned an IP address to access the Internet.

WLC Guest Network DHCP run out of IPs??

Hello,
I have this guest wlan working with web authentication, as you may know in order to get authenticated you must have an IP address first then have a valid username and password. The problem is that if you don't have valid credentials you keep the IP address anyways.
I'd like to know if there is a way to release the IPs that are not being used? The WLC is the DHCP server for this network.
WLC4402
6.0.202.0
Thanks in advance!

That would be good, but right now there is not automated process to remove those clients.
If you are good with scripting, you could setup a script to pull the clients list, then parse it based on the authentication. Once you have that you can then do a client deauthenticate, and wipe the IP address lease as well.
Unfortunately, I can't be too much help as I don't really know scripting.
HTH,
Steve
Please remember to rate useful posts, and mark questions as answered

Airport extreme guest network can't access internet

I upgraded to the 7.6.1 a few weeks ago and recently noticed some oddities, My guest network clients get an IP in the 10.x.x.x network but can't access the internet, the private network is just fine. I looked on the airport utility for any advanced wireless options to indicate setting for the guest but I didn't see anything.
Is this the desired method of operation? My private network is using the 192.168 network, do I have to set my GUEST network to the same range in order to get out with it?
I use a lion server on the network that is also giving out IP via the Lion DHCP Service, is there some other change I need to make to the Airport Extreme to have it forward the Guest network dhcp requests to the Lion Server?
Any help would be appreciated.
Mike.

Turns out when I set my DNS server IP for my APE DHCP to my Internal IP on my Lion server, the Airport Extreme is not allowing those guests to talk to my DNS Server so I updated the DNS to be my external/Public IP and now the guest network can do DNS and access all the cool stuff on the internet.

Guest network in bridged mode (or other non-DHCP mode)

Hello,
I have the (Simultaneous Dual Band II) Airport extreme.
I wanted to use it at work but creating a secure network (my printer, computers, and drives) and a guest network (no password so people can access internet).
They already have a DHCP server (in the past I have a mistake by forgetting to turn off DHCP on a router which assigned other computers IP address (upstream) which conflicted with their DHCP server and all kinds of problems ensued).
So I know that in Bridge Mode, the guest network is turned off.
What are my options? I'm afraid to take if off bridge mode because of the DHCP issue. But I really want to use the dual network mode on the Airport Extreme.
So I don't want to bring down the whole network, can i safely use something other than bridge mode? other ideas?
Thanks in advance for any feedback
(yes I have searched a lot for the issue but I'm not sure what to do)

First, you question the policies about my work place (none of your business).
Sorry for suggesting that you check the policies before you violate something that could get you fired.
But then, you "would bet" that I hooked something wrong (could have asked).
Sorry but that is certainly a higher probability than a router malfunctioning in that manner.
It may not be your intention (just as it is not mine to be ungrateful).
Not sure if you are showing that with your last post.

Need DHCP ending address to set up Guest network on Airport expressk

I have a 2wire modem router that I attached an Airport express to to resolve the issue of constant droppin gof the internet. The wireless and outing are turned off the 2 wire so it acts as a simple modem. I then was able to access the the section in Airport Utility to set up the Guest Network. When I change the net work from Bridged to Shared, I had errors for the beginning and ending DHCP #s. I have the beging number but have no idea what the ending number is or how where to look.

The error message is the DHCP range conflicts with the WAN IP address. The default range that was entered by the utility was 192.168.1.2 to 192.168.1.200. It does not like the begining or the ending address. i entered 192.168.1.254 (DNS server and router) and it accepts that s the starting address.

Using an airport extreme in both bridged mode and guest network with DHCP

I currently use a third-generation airport extreme in bridge mode to connect my various Mac servers To the Internet. I'm using bridge mode on the AirPort Extreme because I have up to five static IP address (only using three now) I am currently not using the wireless network, and none of the servers are serving DHCP. I am looking at the Newer airport extreme with guest network Wi-Fi. My question is, does the new airport extreme base station support bridge- mode for any devices and host DHCP for the guest network connecting wirelessly to the base station?

The AirPort Extreme cannot be in Bridge Mode and support a Guest Network.
The AirPort must be configured to provide DHCP and NAT services if you want to enable the Guest Network function.
If you really do have a 3rd Gen AirPort Extreme, it will support the Guest Network feature if you connect the AirPort directly to a simple modem.....not a modem/router or gateway type of devices.......and configure the AirPort to provide DHCP and NAT services for the network.

HT3477 I am attempting to set up a guest network. When I change the Network settings to DHCP NAT I get a message that tells me that the service has a private IP address and so I must connect using off bridge mode. In this mode I can not connect to the int

I am attempting to set up a guest network on the Airport Extreme Base Station. The Base Station is connected to a DSL Modem. The network is also extended using an Airport Express. When I have attempted to set up the Base Station using DHCP NAT in the netword feature I get a message that because the service has a private IP address the only way that I can connect is in Off Bridge Mode. In this mode I do not seem to be able to connect to the internet using the guest network. Any suggestions would be helpful.

Ok, your Speedport is actually a combination DSL modem and wireless router. In this case you would typically configure a downstream router, like your AirPort Extreme in Bridge mode. Unfortunately, when in Bridge mode, the AirPort does NOT support providing a guest network.
The only possible option is to reconfigure the Speedport as a bridge and use the Extreme as your Internet router. You would still need the DSL modem provided by the Speedport for Internet connectivity.

Guest network feature of Time Capsule/Airport Extreme in conflict with DNS on OS X Server?

Hi, I want use the guest network feature of Time Capsule/Airport Extreme which requires an external DNS server but my OS X Server is the dns server...Can I configure server and airport with an external dns without messing up my OS server?
Thx Ron

If you want to use the guest network while also using your server for DNS - you will need to do the following: It's a bit painful - but it works.
On your Airport Device (Airport Extreme or Time Capsule) - in the Internet tab you will need to do one of the following:
1) Leave the DNS Servers Blank - which they will default to the DNS servers provided by your ISP.
2) Actually enter your ISP's DNS servers.
3) Enter Open DNS servers (I use 208.67.222.222 / 208.67.220.220).
The DNS servers specified in the airport device must be internet routable addresses (if you are going to use the guest network functionality) - and cannot refer to private ip address (e.g. 10.x.x.x, 192.168.x.x, etc).
Here is the painful part...on all of the devices (Macs, PCs, phones, ipads - that will be used on your "private" network 10.0.1.x - you will need to provide static DNS setting (but still allow DHCP to assign the devices IP address). You will specify 10.0.1.13 as primary DNS and 208.267.222.222 (or your ISP's primary DNS IP).
One you do this - your devices that you permanently use on your local network - will still use your server for DNS - and the external DNS - should your DNS server happen to be down.
Anyone visiting your house - will connect to your guest network - and automatically be DHCP assigned a guest IP address - and the external DNS servers that you specified in the Airport Extreme device.
This has been working great for me. I suspect that the guest network functionality is flawed in the Airport Extreme/Express and Time Capsule. Since I do not have another router that provides a guest network - I cannot say whether this issues is limited to the Airport devices - or whether this workaround would need to be done - regardless of which brand of router is providing the guest network.
In a nutshell - your household permanent devices will have to specify static DNS servers - but your guests will connect seamlessly without having to change and risk messing up any of their device settings.
If this solution works for you - Please be sure to click either "This solved my problem" or "This helped me".

Guest Networking with Time Capsule - bridge mode?

Hi, hopefully someone can help.
I'm trying to set up guest networking with my time capsule but it's currently set up in bridge mode so it wont let me.
When I try it in public IP address mode it says 'The DHCP range you have entered conflicts with the WAN IP address of your Airport wireless device'
I'm completely new to networking and have no idea what most of these terms mean, despite googling them all!
Can anyone advise on what I need to do to get it all set up?
Thanks in advance, any help much appreciated!!
Andy

Is there no way I could switch off part of the router so it just becomes a modem (or are they completely different things)?
It might be possible to convert the gateway to function as a simple bridge only modem, but that would involve checking with the support folks for the device. I doubt that your service provider will provide any assistance with this, because they will likely claim that this type of configuration is not supported.
So, look to see who actually manufactured the device and check with their online forum or support site to see if the conversion to a simple bridge only modem is possible.
You don't indicate whether you have cable of DSL service, and that will of course affect things as well. If you need to go to a simple modem, the best choice is always a device offered by your service provider, so that you will be supported in the event of Internet connection difficulties.
If you try an off-the-shelf modem and have any problems, your service provider will offer little or no support. Often, you can get a free modem from your provider in return for a commitment of a year's service. Might be worth checking that out.

Guest network inside company network

Hi All,
I have AirPort Extreme 4th generation which is configured inside company network to give access to internet and internal network for our emplyees. Right now it is working in Bridge mode and just forwards packages from wi-fi clients to DHCP server or whatever they need. I need to configure Guest netwotk to allow only access to internet but not to internal network.
Is it possible to do when AirPort connected to internal router or switch but not to ISP?

Is it possible to do when AirPort connected to internal router or switch but not to ISP?
Not in the way that the AirPort was designed to operate as a device connected directly to a simple modem, making it a "main" router handling DHCP and NAT services.
It is not possible to say whether you might be able to set up the Guest Network function and have it operate correctly.
If you want to try, you need to perform a Factory Default Reset on the AirPort and then configure it to act as a router handling DHCP and NAT services.
That may create DHCP conflicts since you already have another device handling DHCP on the network....and any devices on the "main" network there receiving DHCP from your server will not be able to "see" other devices on the AirPort network, since they will not be on the same subnet.
it will definitely create a Double NAT issue, which will tend to slow down things a bit on the AirPort network.
The bottom line is that you will be breaking some basic network rules if you try this. Whether or it will work cannot be known until you try it out on your own network.
If you have strict network security procedures, the hypothetical setup above is not going to pass when the inspectors come around.

DHCP Conflict Detection & Win 7 Firewall..

       This may be a stupid question, but I can't quite find the answer....
   We have a small network, about 200 computers (Server 2012), Win 7 workstations (Very Few XP's left)
I had one workstation detect an IP conflict (XP if it makes any difference), and it just was assigned another address
and it was on its merry way.   I took a look at the DHCP server and realized that I never turned on DHCP Conflict detection.
I turned it on and set it for 1 attempt.
    So for the heck of it I pinged the workstation and DNS worked but ping is blocked on the workstations firewall.
    Which made me wonder if I should push out a GP to allow ping to all the workstations???? (Question 1)
     Question two: If I do that to all the workstations, what would stop it from happening if someone brings a "guest"
     laptop into the building??
           What would be best options? or is it working as it should and I am just Paranoid!! LOL
                           Thank You in advance for any advice
                                           Wolverine..

Hi,
According to
this article, Client computers running Windows Server 2008, Windows Vista, Windows Server 2003, Windows XP, Windows 2000, Windows NT 4.0, Windows Millennium Edition, and Windows 98 automatically check to determine if an IP address is already in use before
using it. I think this behavior still exists in windows server 2012.
On the server-side, when a DHCP client requests a lease, a DHCP server checks its pool of available addresses and assigns the client a lease on an available IPv4 address. By default, the server checks only the list of current leases to determine whether an
address is available. It doesn’t actually query the network to see whether an address is in use. If you enable address conflict detection, the DHCP server uses the ping process to test available scope IP addresses before including these addresses in DHCP lease
offers to clients.
In addition, each additional conflict detection attempt delays the DHCP server response by a second while waiting for the ping request to time out. This increases the load on the server, so it is not recommended to set the value greater than two for ping attempts.
Hope this helps!
Best regards,
Susie

Guest Networking solution to workaround an older non-dual band AExtreme?

When I first set up my brand new (month old) Time Capsule (TC) to Extend a Wireless Network on my pre-existing Airpot Extreme (AE-2007 version) Ethernet connected network (simple modem), the Guest Network tab showed up during my AirPort Utilities (AU) adjustments. Yet, shortly after giving a name and password to the Guest Network the following dialogue appeared:
"DHCP Beginning Address:
The DHCP range you have entered conflicts with the WAN IP address of your AirPort wireless device" (showing: "10.0.1.2") and
"DHCP Ending Address:
The DHCP range you have entered conflicts with the WAN IP address of your AirPort wireless device"
(showing: "10.0.1.200").
There was no actual apparent conflict of addresses while otherwise my wireless network was working fine until then. Since I could not figure out how to solve this issue, I chose to revert (button) the action.
Now, although my wireless network is working fine, the Guest Networking tab is gone for good from my AU as well as my settings for Guest Networking is non-existent.
After searching for solutions herein the community forum, I figured that my AE in NOT a Dual Band version capable of the Guest Network option which AU had first presented me with.
MY QUESTION NOW IS:
If I switch to a new wireless set up having my brand new TC acting as the main base connected to the simple modem (Ethernet), leaving it to "Share a Public IP Address", while using my older AE to "Extend a Wireless Network", will I be able to get the Guest Network tab back in AU (to set up via TC) a wireless Guest Network?
Thanks in advance for your help!

MY QUESTION NOW IS:
If I switch to a new wireless set up having my brand new TC acting as the main base connected to the simple modem (Ethernet), leaving it to "Share a Public IP Address", while using my older AE to "Extend a Wireless Network", will I be able to get the Guest Network tab back in AU (to set up via TC) a wireless Guest Network?
Yes. Your TC is a dual-band model, so you'll have the option of creating a guest network as long as your TC is set to "Share a Public IP" and "Create a wireless network."
EDIT: Note that you won't be able to wirelessly extend the guest network. You'll still be able to wirelessly extend the main network.

Cascading EA4500s and Guest Network access

Hi, I hope esomone can help me here. I've got two EA4500 routers connected via ethernet. The primary router has DHCP enabled and the secondary has it disabled. IP address of primary is 192.168.1.1 and the secondary is 192.168.1.2.
I have set up guest access on both routers however only the primary router allows users to connect. When out of range of the primary router but in range of the secondary router the network is visible but when you try to connect to it, it only gives limited or no connectivity message and can't connect to the internet.
Is it possible for the guest network access to follow the same pattern as the secure network, i.e. the same network throughout the house?
Regards
Jon

Cascading two routers should have correct parameters set. For instance, the Ethernet port of the secondary router should be connected to the ethernet port of the primary one, and the DHCP should be disabled on the second router. The ip address you've set are correct for the both routers. This thing shoud be done if the connection is LAN to LAN.
By the way there are two types of cascading: Click here for info!
For the Guest Network:
Guest Network would only work if the the DHCP is enabled on your router. It means to say that on the type of setup you're doing which is LAN to LAN (DHCP disabled on the second router), Guest network would not work on the secondary router. If the connection is LAN to WAN, then both of the router should have Guest Network working.

Using Airport Express on separate subnet to make isolated Guest Network?

Hi. I've done a search here, I've tried setting this up at my house but haven't figured it out yet.
Friends have Verizon FiOS service. They're using the provided modem as the ethernet router and it is handing out DHCP addresses, and for a number of reasons including their home theater, on demand use, etc., they want to keep the FiOS modem as the router, not an Apple product.
We're using an Airport Extreme and a Time Capsule both in bridge mode to distribute the wireless network and everything works fine. They'd like to add an isolated, unencrypted Guest Network. I know we can't use the Extreme's Guest tab because we're in bridge mode.
But we do have a new Airport Express. It seems like there would be a way to set up a Double NAT on a different subnet and give guest users access to the internet but not to computers, shared volumes, printers, and everything else on the primary, encrypted network.
Is there a way to do this or will every address coming from the FiOS router be on the same subnet? Are there any other horrible consequences from doing this, i.e., the primary network will still operate fine?
If the DHCP range coming from the FiOS router is 192.168.15.001 to 192.168.15.199, do I set the Airport Express IP address manually? To what?
To eliminate the possibility of duplicate IP addresses would you have the Airport Express hand out a small range of IPs on a completely different network area, like 10.0.1.1?
Any other suggestions? Thank you.

I was trying to create a primary and guest network division after the router... such as an unusual configuration in the AEBSn after the FiOS router.
At my home I have my cable modem connected to an AEBSn, which is doing my network's routing. But I didn't set a Guest Network on this AEBSn. I am trying to set up a discrete Guest Network downline from this router. (Which would simulate my friend's installation where they're using a FiOS modem/router all in one and we want to create a discrete Guest Network after that.)
But as I guess you've been patiently trying to get through to me, Bob, whatever outlying separation you may be able to create seems to get put back together at the main router.
For example, today I connected a second AEBSn ("AEBSn Guest") to the LAN port of my primary AEBSn router. I set the AEBSn Guest to create a wireless network, and I set that to be a closed encrypted network called "Test," and I enabled unencrypted Guest Networking as usual and told the AEBSn to ignore the Double NAT error.
With this configuration I am able to get on the open Guest SSID, and internet connection is normal. Between the Guest and the primary encrypted network, printing is broken, iPhoto sharing is broken, and so on, but I still see shared volumes and can log in with authentication.
So I can see why a solution to this may have been elusive.
I don't know much about cable TV's subscription services but I took a peek at the set up pages of the Verizon FiOS router and noted there was a lot going on there. Lots of ethernet and cable IP addresses to Set Top Boxes, etc. Not sure if all this could be recreated within the administration of the Airport Extreme, but I am hesitant to risk messing up the Comcast services which are presently working well.
In terms of zooming out to the big picture... when I invite guests to share my internet service, they're usually doing email and web browsing for the weekend but at the end of their stay they want to print their boarding passes... so despite setting up a guest network I might end up giving them access to the main network anyway.
Thanks for the help, Bob.

Guest network DHCP conflict

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