iPhone 6 Plus receives the static DoD iP-address 26.x.x.x. in my LAN?

Question

iPhone 6 Plus receives the static DoD iP-address 26.x.x.x. in my LAN?

My iPhone 6 Plus receives, when connecting to my network (192.168.xxx.xxx) a weird iP namely 26.0.62.0 & 26.1.220.0 from the Department of Defense Network Information Center (DNIC). This is logged into my firewall of the UBEE 321b modem. Also note that both the SOURCE and TARGET uses port "0" to make a connection. To me, even the TARGET iP-address makes no sense to me.

When connecting to my network for the first time:

After a while it gets a normal iP-address from within the range of my network or after I've done a refresh on the logging page in my router later in time:

NOTE: the MAC address (ending at :C5:0A) is from my iPhone 6+. I also checked this behaviour on my 'old' iPhone 4 too, but no such issues at all.

I called my ISP (Ziggo) and they have no idea what's happened and ask me to search for the solution on Apple related forums. Does anybody have this same connection issues (perhaps to other iP's form the Department of Defense)? Why does these iP-addresses run thru my modem at port "0"?

ISP information:

Home Internet: Ziggo in The Netherlands

iPhone 4 on iOS 8 + iPhone 6 Plus on iOS 9.2.1 (13D20) subscriptions: Ziggo in The Netherlands (using the Vodafone 3G and 4G network for both iPhones)

Thanks for reading and any direction and/or help is greatly appreciated!

Cheers

Message was edited by: Berend de Meyer / typo's

iPhone 6 Plus, iOS 9.2.1, 16GB

Posted on Mar 30, 2016 3:51 AM

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Answer 1

wjosten

Level 10

95,369 points

Mar 31, 2016 9:22 AM in response to Berend de Meyer

Could be because the Department of Defense is squatting on a massive number of IPv4 addresses and is not using most of it. Phone networks like yours "borrow" these IP addresses because their networks are larger than the 16 million hosts that the 10.x.x.x network can provide. Your carrier assigns the (unused) DoD IP addresses internally to its phones and then NATting the traffic from the phones to the public IPs. Since SIP packets have an additional IP address embedded inside, your carrier's firewalls aren’t NATting that IP and thus the ordinarily “private” IP address is getting through the NAT process.

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Answer 2

Mar 31, 2016 9:22 AM in response to wjosten

Thanks for your reply. Yes, reading some more on the net I came across a lot of threads with this subject about ISP's hiring some iP-addresses.

Another chap told me:

With a dual- stack network , I mean in this stack are both the wifi and 3g stack.
Which in most phones are both active with the WiFi stack normally takes precedence.
Can best meet the Apple implementation ( or institution) are the 3g is tried first, then the wifi then only apply the priority rules , making the final connection with only the wifi.

My ISP rep told me they had no knowledge about using iP's from the DoD. The search continous...

Cheers

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