DHCP Passthrough on Airport Extreme

I have a small business network running a Windows SBS 2003 server that provides DHCP and DNS for the network. I'd like to connect the Airport Extreme and continuing having the server provide IPs, etc. to my wireless and wired clients. Do I simply put the Airport Extreme in "Connection Sharing: Off" mode and that should do it? I connect the rest of the wired network to the WAN port or one of the three LAN ports?
Thanks!

Ok, if I got you current network configuration correctly, it should look something like the following:
Netgear router > (Ethernet cable) > (Port_#A) Ethernet Switch (Ports_#B+) > (Ethernet cables) > wired devices including the SBS.
If your plan is to replace the Netgear router with the AEBSn, the problem is that you cannot disable DHCP without disabling NAT. If the AEBSn is configured as a bridge, another router will have to, at least, provide the NAT service.
Another option is to retain the Netgear router, but configure the AEBSn as a bridge (as you suggested), but connect the AEBSn to one of the ports of the switch. That way, the Belkin can continue to provide the NAT service and the SBS can provide the DHCP/DNS services.

Similar Messages

How do i use my own dhcp server with airport extreme

I just bought an airport extreme and I'm trying to replace my linksys router and another access point.
I have my own dhcp/dns server and I want to continue using it. So far, I was not able to find the way to use NAT without DHCP (like I'm doing now with my current setup).
I want to give the device another chance before I return it to the store. Is there anything I can do?
Thanks

I thought that you could figure out the answer for yourself, but if you need more confirmation.....the choices/options that you need do not exist on an AirPort router.
Cisco or Netgear might be brands to look at. Good luck in your quest.

Trying to resolve a DHCP conflict involving Airport Extreme

I have my LAN set up so that the router hands out addresses with DHCP in the 192.168.1 range. Also on the network is an Airport Extreme (an older 11g model running the 5.7 firmware). I am having a terrible time trying to configure it so that it hands out addresses to its clients in the 10.0.1 range. No matter what I try, the Airport DHCP server is overridden by the DHCP server on the main router and a 192.168 address is assigned.
On the first configuration page of Airport Utility under the Internet tab, I have chosen Connect using Ethernet and DHCP. And I have chosen "Share a public IP address." Under the DHCP tab I've indicated beginning and ending IP addresses from 10.0.1.10 to 10.0.1.20. Why then when I connect to the airport with, say, my laptop, do I get a 192.168 address?
Any advice would be much appreciated.

What you are trying to do is quite common, but perhaps the key is that the LAN with the DHCP router assigning 192.168.1 addresses must be connected to the AEBS via its WAN port.
In a default (configured from Factory Reset) scenario, the AEBS will request an IP address from the router via DHCP for itself, and will distribute IP addresses for its clients (wireless and via its LAN port) via DHCP from the pool you've specified if you have it set up to "Share a public IP address."
You can read more about setting up this type of network starting on page 24 of the Apple manual Designing AirPort Networks.
I suspect what's happening is the router is connected to your AirPort's LAN port, which causes a race condition between the two DHCP servers as to which will provide an address to new network devices.

Bridge Mode or DHCP for two Airport Extreme via ethernet?

I have Two airport extreme setup in a six floor brownstone home in New York City. My verizon internet router is set up on the top floor with an airport extreme, my basement has the second airport extreme connected via ethernet wired from the top floor. I use DHCP from verizon internet. Do I set up my two airport extreme Bridge mode or DHCP?
Im having issues with my iphone not connecting through my basement airport extreme. Airport extreme status looks fine, green light and in working order.
Please help.

Do I set up my two airport extreme Bridge mode or DHCP?
Bridge Mode. But, you don't have to worry about this, since the configuration wizard will do this for you automatically.
Im having issues with my iphone not connecting through my basement airport extreme.
Suggest that you work your way through the iOS troubleshooting guide linked just below.
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support
For further assistance with iPhone issues, please post in the iPhone support forum linked just below.
Using iPhone

Maximum number of DHCP clients with Airport Extreme (802.11n)?

I see in the documentation that the number of wireless clients that the new Airport Extreme can handle is 50, but it doesn't indicate that it can handle more than 50 via the LAN ports.
Has anyone connected one of these units to a network with more than 50 simultaneously connected (wired) computers?
Thanks much.
Scott
Ti PowerBook G4 Mac OS X (10.4.9)

Yeah, I knew I'd have to answer that question eventually. I debated including that information with my initial post--I should have. Sorry.
I realize that it's a home unit, and it will be when I'm done. I need to set something up as a temporary solution for a LAN party at our college, but I need to keep it separate from our regular network.
I've got all the switches I need (we usually get by with 3 unmanaged Cisco 24-port switches). I'm just looking for a solution that is simpler than reconfiguring a Linux machine as a DHCP server and gateway for a three-day LAN bash--I am more interested in the DHCP server functionality. So, has anyone seen one of the new units give out IP addresses to more than 50 clients?
Thanks,
Scott

Custom DHCP range on Airport Extreme?

Hi Guys,
I've been googling unsuccessfully for a solution to this problem. It seems that the Airport locks me into 3 possible DHCP ranges. However, I need a custom dhcp range like this:
192.150.23.*
Is there any hack I can use to do this?
Thanks!
John Francis

Um, someone correct me if I'm wrong but that's not an internal IP. In fact, It looks like Adobe owns that class C subnet.
http://www.flumps.org/ip/c/192/192_150.html

Using DHCP Airport Extreme WRONG IP ADDY

I connect my modem directly to my computer and the internet works perfectly.
I try and use my Airport Extreme using DHCP and my Airport Extreme ALWAYS automatically picks an INVALID IP address.
I have no idea why the Airport Extreme is doing this.

When changing network configurations, it is always a good idea to do a complete power recycle of all of your network components.
Try the following, in order, checking for Internet access after each step, until resolved:
1. If the modem has a reset switch, use it to reset the modem. Wait at least 5-10 minutes for the modem to initialize.
2. Remove power from the modem. If it has a backup battery, remove this as well. Wait 5-10 minutes. Replace the battery, and add power back to the modem.
3. Perform a complete power recycle of your network components as follows:
Modem/Router Power Recycling - Quick
o Power-off the modem, 802.11n AirPort Extreme Base Station (AEBSn), & computer(s); Wait at least 5 minutes.
o Power-on the modem; Wait at least 5 minutes.
o Power-on the AEBSn; Wait at least 5 minutes.
o Power-on the computer(s)
If this fails to get the modem to "recognize" the Internet router, then try the "Full" version.
Modem/Router Power ReCycling - Full
o Power-off the modem, AEBSn, & computer(s). (Wait at least 30 minutes. If possible, leave the modem off overnight.)
o Power-on the modem; Wait at least 15 minutes.
o Power-on the AEBSn; Wait at least 5 minutes.
o Power-on the computer(s)
4. Contact your ISP to have them perform a "modem reset."

How to connect a ADSL router to AirPort Extreme?

Hallo,
my local internet service provider forces all costumers to use their modem/router to connect to the Internet using a DSL connection.
I have one external public IP (v4) and the router has an editable IP for the LAN set to 192.168.1.1 .
The ISP router can act as DHCP server and NAT; I can disable the DHCP.
What I would like to do is connect it to the Airport Extreme WAN port and give all the control to the Airport extreme: I want to use his DHCP server, NAT, port forwarding etc.
My problem is that I am able to have Internet connection only if the ISP router has DHCP control and Airport Extreme is set to Bridge mode.
In this configuration, in the Airport Internet configuration panel, the connection is set to Ethernet, IPv4 is using DHCP, Airport IP is 192.168.1.133 and the ISP router has 192.168.1.1 . I also have the DNS IPs set to the ones suggested by the ISP and Bridge mode.
In this way it works: all computers can share Internet connection.
What I am trying to do is:
- disable DHCP in the ISP router;
- in the Airport extreme Internet panel I choose to manually setup IPv4 and I type the same vales it is getting when set to DHCP mode: 192.168.1.133 for the Base and 192.168.1.1 for the router using the ISP dns and I select Share pubblic IP. In the DHCP panel I choose 10.0.1 class.
I save changes and... I got that Internet is no working anymore and I cannot access the ISP router control panel.
Does anybody have suggestion about things to try to not use ISP router DHCP or configuration changes I could try?
Thanks in advance for any help about it!

Thanks for the reply,
at the end it seems that my airport extreme works too BUT with an error message saying "double NAT" and the front led turned to yellow. I have ignored such error because things seems to work and so the led color goes to green.
What I had to do here is:
- set previous router to IP 192.168.1.1
- turn off DHCP on my previous router;
- leave on the NAPT (NAT) service on previous router and set it with start and stop address to the same IP I am using for the Airport Extreme (192.168.1.100);
- open all ports and services on previous router by faking the mac address of the Computer's NIC I was using to configure router. I say faking because previous router wants to know for which computer the ports have to be open, so I had to use the same mac address of the Airport extreme. I cannot type it, previous router will get it automatically when configuring it.
- on the Airport Extreme, Internet side, I had to manually configure Internet options using Ethernet mode: I set the IP 192.168.1.100 for the Airport base. Then I have enabled DHCP on class 10.0.1.x .
Airport extreme seems to work with all features now, I hope that "double NAT" warning will not create any trouble. Anybody knows about that?

Airport Extreme, Time Capsule and N and G

Hi,
A quick background. I can't have wires, other than from my iMac to my Airport. So I use wireless. I like the N speed from my mac to my fileserver and even though it is slow compared to ethernet a chronosync job is just fine over night. The problem is I have to use G for my xbox and wii, which seems to reduce the speed of the connection.
I have been looking into getting a time capsule to replace my air port extreme and wonder if the following would be possible:
Set time capsule up as n only using channel 1.
Connected to this via ethernet would be my internet and my iMac and my server/laptop using n
Set airport extreme as b/g compatible using channel 11 so my xbox and wii and connect.
My question, is there some way that the airport can be linked to the time capsule with ethernet to share the internet connection used by the time capsule? Could you connect the internet ethernet port from the airport express to an ethernet port on the time capsule?
Any thoughts, opinion and tips would be welcomed. Basically I thought as I want a time capsule it could be an opportunity to get the most out of the devices.
Steve

This should be possible. The key is to disable DHCP on the Airport Extreme. You could then simply connect a standard Ethernet cable from the TC's LAN port to the Airport Extreme's LAN port (or WAN port if you enable what I believe Apple calls Bridge Mode).
I use a Linksys WRT-54G and an Airport Express. The Airport Express is a second access point and on it I simply disable DHCP and it works flawlessly. Your setup would be similar. And what you're proposing is actually a great way to setup a wireless network. You will need to have two SSIDs so your client devices don't get confused about which to connect to.
Message was edited by: Dave Z (fixed a grammar error)

Airport Extreme Network (Wired) Dropoffs

Hi everyone,
I've been suffering with a problem with my Airport Express for as long as I've owned it and finally decided I would make a major step to resolving the problem (primarily held back by not wanting to purchase another router to prove the problem).
I run a home Wireless network consisting of 2 x G4 PB 1.33 12" with Airport Extreme built in and 1 x Mac Mini with Airport Extreme built in. All devices connect to the Internet via this Airport Extreme which I have configured in NATing mode running DHCP. The Airport Extreme connects to the Internet (3Mbit/s Cable) via my Motorola Surfboard SB4100 Cablemodem using the Ethernet port. In between the cablemodem and the Airport Express is a 5 port 10/100 Switch, that enables me to connect my PS2/Xbox/GCN to the Internet (I have 2 Internet IPs, one for Gaming and one for Airport).
I have the Airport configured so that when there is activity the light flashes.
The problem I was getting was that occassionally (sometimes every 30 mins, sometimes more, sometimes less frequently but always frequently enough that I would be interrupted while doing things online) the connectivity to the Internet would pause. The pause was typically 10 seconds, sometimes less but never more than 20 seconds. While the Internet paused the light on the Airport would go orange and flash, as though it'd lost its IP address or something. Performing a hard reset on the device would not affect the reliability of the Airport and this connection and also up and downgrading the firmware from 6.1.0 to 6.1.1 to 6.2 does not affect the reliability either.
When I check the log of my surfboard occassionally I see sync'ing errors and put the problem down to this, however there were certainly less errors reported in the SB4100 log than there were downages.
I put the problem down to an IP renewal problem (where the Airport was renewing the DHCP lease) and kinda tried to tolerate the outages even though they are really annoying.
I had the opportunity to get my hands on a Cisco PIX 501 cheap the other day and took advantage in an effort to perhaps irradicate this problem or just perform some testing and my results are even more bizarre.
Now I have configured the PIX 501 to perform all the NAT/PAT functions that the Airport used to perform along with DHCP, etc.. The Airport has been configured purely as an Access Point, only bridging between wired and wireless.
The problem is still occurring in the new configuration!!
What I have found, though, from the indicator lights on Cisco PIX (indicating link speed and activity on the 4 ports of the integrated 10/100 switch) is that when the Airport goes "funny" the link light for the port that the Airport connects to goes out until the Airport goes back to green on its LED.
To me this looks like there could be an intermitted fault with the Ethernet interface on my Airport Express or a dodgey Ethernet cable. So I replace the Ethernet cable with a brand new 2m CAT5e cable to test this, and as expected the problem is still present. Next just to confirm absolutely 100% I move the Airport to a different port on the PIX and plug my PB directly into the old port (Disabling Airport) and test connectivity. I do not get a dropped link on that port and when the Airport is dropped I can still connect through the Cisco using my wired connection.
When I spoke to Apple they said that I should switch firmware versions to 6.1.1, then 6.1.0 and then back to 6.2 which has not helped either.
As a little quirky puzzler I can also force the problem to manifest itself by using Remote Desktop Protocol to connect to either a Windows Terminal Server or XP machine through the Airport. When I do this the problem will appear within minutes and recur every couple of minutes but not with any real regularity. Unfortunately for me this is something that I do very frequently
Before I try and take this unit back to Apple has anyone else seen this kind of problem and possibl

My apologies, perhaps it's not clear. The Cisco PIX is a router/firewall device. This is exactly what I have done and the problem is clearly nothing to do with anything except the Airport as my investigations and testing have proved.

Using several Airport Extremes to create and extend corporate + guest wifi

hello all,
my office has purchased 6 airport extremes for our new office, AirPort Extreme 802.11ac (6th Generation), running version 7.73
the plan was to hard wire one extreme via the wan port and create both a corporate and guest network
then link to the others throughout the office by wirelessly extending to provide complete coverage
after moving around the location of one or two units my coverage is now complete across the office space
my setup is as follows:
my network is a windows active directory setup where one of my domain controllers is my DHCP server in the range 192.168.x.x
to enable the guest network on my extremes i need to have my first hard wired (wan port) extreme unit configured in DHCP mode
this airport extreme has pulled down an ip address from my windows server in the range 192.168.x.x
the extreme then uses its own dhcp range to provide connectivity to my clients, 172.16.x.x for corporate wifi and 10.0.x.x for guest wifi
my issue is
the dhcp range that the extreme uses for all my corporate wifi users is 172.16.x.x
i cannot access any servers on my windows network 192.168.x.x by drive maps/hostnames as they are challenged for authentication
I can only access by using ip addresses instead of hostnames
all of my shares and wired users are configured to use hostnames for file shares, printers etc on my servers
the first extreme gets its DNS info from my windows dhcp server correctly but these settings are not passed down to my wifi clients
is there a way to do this ?
I have tried using the 'domain name' field on the extreme dhcp config but this had made no difference
can anyone advise on this ?
do i need to use a different setup, maybe switch to wired config ?
what i'd like to have is the following:
2 wireless networks, one for corporate users and one for guests/visitors
my corporate users to have access to all my corporate servers as their permissions allow using hostnames for access
my guest users to have internet access only
my 6 access points to be connected to each other either wired or wirelessly to provide coverage throughout my office
i was told that the 6 airport extreme's would allow me to do this but now i'm not so sure
any help or suggestions would be gratefully accepted,
thanks

You are trying to use Apple domestic products in a business setup.. this is not what they were designed for.
Could you use 3 units to cover the offices.. please have a go as this simplifies things tremendously.. just use three units in bridge.. preferably all connected to your ethernet network and so operating as AP only.
If that works then use the other 3 units for your guest network.. these should then be placed on a different vlan via your main managed switch.. so they can get internet but have no connection at all to the office network.. but other ways around it could be found. As you have already discovered a simple double NAT might sufficiently block guest access.

Airport Extreme question from a possible buyer....

Hey all!
I was thinking about buying an Airport Extreme so I can wirelessly backup to my hard drive for my macbook. The price I can deal with, don't worry, but here is my question:
Can I use the Airport Extreme with my current router?
Currently, I am using a BT Home Hub (v1.0) with a belkin router (with the DHCP not set to give out ip addresses) which extends my network (perfectly) and gives out the same ip addresses the Home Hub does.
Can I replace the Belkin Router with an Airport Extreme? This is so I can extend the network and share my hard drive so that all mac users in my house can backup.
For this to work, I need to be able to disable DHCP on the Airport Extreme and insert my LAN ethernet cable into the WAN port (is that right??) and hopefully the Airport Extreme will send out the same network that the Home Hub does.
-- Can I do this? --
Reason I am asking is because I don't want to fork out loads of money on an Airport Extreme, only to find out it doesn't work and be really disappointed and have wasted £120!!
Thanks, James

Hi James,
I use a similar setup, usually without any problem. The last week has been a different story though, both in function and in Apple's responsiveness to problems. I would recommend reading the thread here before making the purchase. At the very least, it would be a good idea to wait until Apple acknowledges the problem and brings a fix forward.

Airport Extrem doesn t give internet access to my new windows 7

Hello,
I ve bought an ACER laptop aspire one with windows 7. Its wifi + internet has work fine in airports, hotels and friend s homes, but in my home wiht my Airport Extrem it is impossible to get internet access with wifi ( connection limited indicqted with the yellow triangle ).
The Airport extrem works fine with another mac and others windows XP and vista...using the DHCP.
Ther Airport extrem identify the MAC @ of the aspire one but it seems like DHCP servers doesnt give it an IP@. The log:
Jan 02 00:29:06
Severity:5
Rotated TKIP group key.
Jan 02 00:29:27
Severity:5
Associated with station 84:4b:f5:01:49:81
Jan 02 00:29:27
Severity:5
Installed unicast TKIP key for supplicant 84:4b:f5:01:49:81
So I tryed to attribute/reserve a fixed IP@ without succes.
I tryied to install bonjour for windows...add the suffix "local" to the name of the PC...without success....finally I tryed an ipconfig /renew and windows answer is that it the DHCP server didnt reponse. Time out.
Do you have any tip ?
Thank you very much !
Joan

d00dbro wrote:
Sorry I don't have an answer, but I have the same problem. XP works with my router, but 7 does not. They don't receive the IP address.
Download the very latest driver from the manufacturer of the wireless card.
Make sure you load the airport utility for windows into the computer.. use ethernet to do it.
Intel cards are the worst.. they often have issues.
Remember that windows can move location spontaneously.. it should be home.. not work not public.
Turn off all the firewalls.. there might be several if you buy a laptop with trial software.
If you continue having issues we need more details of what TC and what firmware it is running.
Change all names in the AEto windows compatible.. never forget Apple names are not going to necessarily work. This includes the AE name and wireless name/s.
Windows names.. short, no spaces and pure alphanumeric.. (it is a bit broader than that.. but it is easier to stick to the known working subset) Certainly no spaces in the name and no apostrophe as Apple setups seem to create.
Use fixed wireless channels can also help.. with separate names for 2.4ghz and 5ghz.

Airport Extreme 802.11ac VPN Passthrough (IPSec, PPTP, and L2TP)

Hi There,
I just got an Airport Extreme 6th Gen and set it up in a breeze using Airport Utility on Mavericks. It was actually too simple to configure but I cannot connect to our company's VPN using Cisco IPSEC. I can't find any settings within Aiport Utility that says about VPN Passthrough. My router mode is in DHCP and NAT mode by the way.
Have anyone experienced this issue and solved it? I know our VPN is working since I upgraded from a Cisco SMB router and if I plug it back in I can connect to it.
Any help will be much appreciated.
Thanks!

What modem is the AE plugged into and is it a router as well??
The AE cannot handle vpn passthrough easily if you have double NAT.. well it just won't work.
If you are using a PC it also may not work because it will need upnp which airport does not provide. Manually forward the ports but it will only work if the AE is the one and only router in the network.
You may still have issues.. as port 500 could well be used by the AE with btmm.. you will need to not use btmm to use ipsec .. but I haven't explored it fully.

Airport Extreme Not Consistently Assigning DHCP

I am using a relatively new (within the last year) Airport Extreme as the primary router on my home network. Connected directly to the router is a GigE switch, an AT&T Microcell, and another router - an Aruba RAP which creates a secure VPN for my home/remote office network. The connection to my Apple desktop is made through the GigE switch, as are three additional wired connections to other devices in my home, including two Apple TV's and (hopefully) two Airport Expresses.
I recently discovered when trying to configure a new Airport Express to extend my wireless network over ethernet (roaiming network) that my Airport extreme is not consistently assigning the IP addresses within it's defined DHCP range (10.0.1.0 - 10.0.1.200). About half of the time devices on the network are getting a default 169.254.x.x IP address, which (in the case of my desktop) results in an 'self assigned IP' error within the network settings. I can reboot my apple desktop and the next time it gets a correct 10.0.1.1 address. Reboot again, it defaults back to a 169 address - and so on. It doesnt seem to make any difference if I connect my desktop directly to the Extreme, or, if I connect it through the GigE switch. And, every time I get a 'self assigned IP' I have no connectivity beyond the Extreme (no internet), and I'm forced to use my wireless/Airport connection.
Another problem here is that the Expresses both expect to receive 10.x IP addresses and when they don't get one, they basically become pretty $100 paperweights when connected over ethernet. Also, if you try to configure a new Express without the 10.x address it expects to be assigned (and defaults to a 169.x), the Airport Utility will no longer 'find' the Express once the Express auto-restarts and the update will fail. I learned this after spending two hours on the phone with Apple support yesterday - during which they were able to get my first generation Express configured, but, not my 24-hour old second Generation Express, which continues to act only as a paperweight. Oddly enough, everything works perfectly well if I use only wireless connections to the Extreme - there are no IP problems and everything works correctly. Unfortunately, I want to use wired connections for all my devices (expresses, Apple TV's) because we stream alot of audio and video.
Is my Extreme not working correctly? Does anyone think it's problematic to have a second router (the Aruba) connected behind the Extreme? I suppose I could force some components to use only specific IP's, but, that sounds like a pain. If the Aruba is problematic, I would also consider a second internet connection, or, finding some way to split home IP traffic vs work IP traffic.
Thoughts?

I've been doing some research and it appears the 'self assigned IP' address is a common problem in the Apple support community. And, for what it's worth, it appears an inability to isolate or accurately troubleshoot the problem - by users or Apple tech support - is a recurring theme. I totally understand that no two home networks are exactly alike (different ISPs, switches, configurations, etc.), but, after being a die-hard PC user for my entire life I can honestly say I never encountered anything like this while using my PC. I'm not about to trash my Mac, but, the Apple 'ease of use' selling point is quickly losing it's lustre.
I got into this mess because I added a GigE switch to my network. Rather than buy a different switch (a tactic which assumes my problems are being caused by the switch) I'm inclined to buy another Airport Extreme and try daisy-chaining them together to overcome the reason I bought the GigE switch in the first place, which is not enough ethernet ports on the Extreme. That, or I'll spend a weekend in my attic re-wiring my home network to daisy-chain my two Express devices together instead of requiring individual connections to my router. My experience with Apple hardware thus far is that it prefers to 'play nice' with other Apple hardware over non-Apple hardware. It could be $100 error on my end (or, a weekend of not doing yardwork), but, I think it's the best shot. Other possible fixes, including manually assigned IP-addresses, put too much emphasis on software and network configuration - which (by my non-scentific analysis), are two areas even harder to troubleshoot.
I'll let you know how it goes.
Mh
Post Script - Dear Apple: please find a way to significantly increase the number of ethernet ports on your Airport Extreme Router. Thank you.

DHCP Passthrough on Airport Extreme

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