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All replies
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Helpful answers
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Sep 7, 2016 6:48 AM in response to bernard.huangby Bob Timmons,Sorry, but Apple will only allow 10.0.x.x addresses to be assigned by the AirPort Extreme.
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Sep 7, 2016 8:42 AM in response to bernard.huangby tygb ,Hello !
Suggested article : AirPort Utility 6.x: Reserve a DHCP address for client computers
Hope , so it can help you .
Thanks !
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Sep 7, 2016 9:02 AM in response to tygbby Bob Timmons,Unfortunately, the article does not mention that the only IP address range that can be assigned by the AirPort router when it is set up to provide DHCP and NAT service is 10.0.x.x, 192.168.x.x or 172.16.x.x
Confirm by checking the settings in AirPort Utility to see that the "10.0" prefix, or "192.168" or "172.16" cannot be changed.
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Sep 7, 2016 2:54 PM in response to bernard.huangby LaPastenague,bernard.huang wrote:
Hi,
I'm trying to setup the airport extreme to be used for our office.
Our office IP is 10.255.x.x
When I am trying to setup DHCP & NAT, within the NAT options,
This is actually easy if you remove NAT.
DHCP is an option. You do not want or need NAT. Then you will have double NAT problems.
So if you want Double NAT..
The fact that the office uses 10.255.x.x. is irrelevant to devices behind the Extreme.. they may as well be on 192.168.x.x (and I highly recommend you do NOT use 10.x.x.x behind another 10.x.x.x because the Apple router doesn't like routing in that setup.. even if the subnet is correctly class C it works as if it is class A.
In fact if the office is using 10.255.x.x then your Airport could also use a small range in the same IP subnet.
Simply fix the main router to exclude a selection of addresses .. eg 10.255.1.1-200 is used by the main router.. and you can then set the AE statically to 201 and use DHCP on the network tab, to clients behind it from 202 - 254. It works fine as I have it running that way.
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Sep 7, 2016 4:18 PM in response to bernard.huangby Bob Timmons,Your original post stated that......
"When I am trying to setup DHCP & NAT, within the NAT options, there's only 10.0.x.x, 172.16.x.x and 192.168.x.x"
If you don't need the AirPort to provide NAT service, then LaPastenague has a good idea for you.


