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Occasional Contributor I

Clients with 0.0.0.0 IP Address

Hi

 

I'm seeing clients showing up with 0.0.0.0 as an IP address. Can anyone shed light as to what these are, and if I should be concerned?

 

Client IPs are issued by a Windows 2012 R2 server.

 

305 AP's running 6.5.1.5-4.3.1.6_61735

 

2017_10_20_09_48_01_Instant.png

Cheers

Guru Elite

Re: Clients with 0.0.0.0 IP Address

What authentication are you using on that SSID?

 


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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Occasional Contributor I

Re: Clients with 0.0.0.0 IP Address

WPA2 personal + MAC auth via local.
Guru Elite

Re: Clients with 0.0.0.0 IP Address

Has this ever worked?  Do any devices on that SSID get ip addresses or this is a new SSID?


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
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Occasional Contributor I

Re: Clients with 0.0.0.0 IP Address

Yep, it works well, and we have approx 18 concurrent clients on there. It's
a BYOD service for staff phones to access the Internet.
Guru Elite

Re: Clients with 0.0.0.0 IP Address

It is possible those are devices that have the PSK, but are not in the mac address table?


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.3 User Guide
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Occasional Contributor I

Re: Clients with 0.0.0.0 IP Address

It's possible. Would that produce this effect? It's Fri night here, so I won't be able to test or check MACs until Tuesday (Stat holiday on Monday, too).
New Contributor

Re: Clients with 0.0.0.0 IP Address

I have a similar situation.  I have just deployed iap 315s. I am using Mac Authentication and WPA2.  There are about 4 clients showing in the gui that are not whitelist mac addresses and have 0.0.0.0 as IP addresses.  I have since blacklisted them and they still show up as a client.  I checked the cli and they are shown as permanent blacklist.  How do you think these clients are showing as clients?

Occasional Contributor I

Re: Clients with 0.0.0.0 IP Address

I finally had enough time to do some testing. This is caused by clients knowing the PSK but not being on the allowed MAC list.

 

Thanks to everyone for the suggestions :)

New Contributor

Re: Clients with 0.0.0.0 IP Address

Hello, 

I have same exact issue too but  in my authentication I don't use Mac Address list. 

 

I have 2 different SSID, first one is limited to internal network, it's just providing internet connection to guests users with WPA-PSK2 method. (there is no issue with that) second one is unlimited access and it provides internal network access too with enterprise level WPA-PSK2 method, which authenticates users via their certificates and username and passwords from Radius server. 

 

I don't know why but my users can not join to enterprise level network sometime. interesting thing is, even if they are authenticated, they can not obtain an IP address from DHCP server. (on this SSID, as I mentioned there is no limitation to access DHCP or something else) when they tried it, I saw their devices with the 0.0.0.0 IP address. 

Any suggestion?

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