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No auto-connect to WLAN with hidden SSID

I work in Infrastructure Services at the IBM Zurich Research Laboratory.

Across IBM, there is a standard setup for wireless LAN access. There’s a public WLAN that provides access only to the internet; and there’s a private WLAN that provides access to both the internet and the corporate intranet. The private WLAN requires authentication via WPA/WPA2 Enterprise using LEAP or a certificate, and has a hidden SSID.

Both WLANs are served by the same access points.

The iPhone and iPod Touch do not automatically reconnect to the private WLAN with the hidden SSID.

Each time the iPhone wakes from sleep, the user must connect manually to the private WLAN. The user must go into Settings and then Wi-Fi, wait for the private WLAN to appear in the list (there’s always a delay) and then tap on it. Also, if one opens Mail or Safari application before connecting manually, the the blue pop-up list of available networks will not include the private WLAN with the hidden SSID.

This is a major inconvenience, because it adds half a minute or more to each operation that requires network access. Checking one’s email—something that should normally take no more than ten seconds—instead takes a minute or more, depending on how quickly one manages to connect.

This bug also results in needless expense, because network operations that should go over the local WLAN often go instead over the mobile phone network.

The inability of the iPhone/iPod Touch to reconnect automatically to networks with hidden SSID has been a problem since the original iPhone came out.

This problem is an obstacle preventing wider adoption of the iPhone within IBM.

Mac Pro, MacBook Pro, Mac OS X (10.5.7)

Posted on Aug 7, 2009 3:02 AM

Reply
37 replies

Oct 22, 2009 7:06 PM in response to Michael Lowry

Anyone have an update on this ?

I have a new 3GS with 3.1.2 and have the same issue. I haven't tried the factory reset yet, but from this link;

http://l00pback.wordpress.com/2009/10/14/iphone-3-1-bug-no-auto-reconnect-to-hid den-ssid-wireless-networks/

“Work around”: Not really a workaround, but a sightly less frustrating way of reconnecting… when in range of the network… recreate the network by entering the SSID and leave out any of the security stuff then click Join. The join will fail (for obvious reasons), but will then “remind” the phone that that network exists and will then connect using the previously configured settings."

takes some of the pain away.

Nov 18, 2009 4:13 AM in response to paladin252

Having the same problem.

In portugal some Universities like where I work use a wifi network called eduroam that's hidden (non Broadcasting ssid)

The iphone connects fine, and the connection works flawlessly.
The only problem is that users need to manualy connect every time.
We use Cisco AccessPoints, WPA enterprise.

APPLE please fiz this... this is a pain for our users

Nov 18, 2009 11:57 PM in response to rukinhas

I've had this problem for a few weeks and I think I have just found a solution.
Reset your network settings;
Settings
General
Reset
Reset Network Settings

then do a reboot;
Press power and select buttons for ~10 seconds without touching the power off slider.

When you turn on again you will have to re-enter the network settings, however my iPhone then remembered my hidden SSID.

Good luck 🙂

Dec 29, 2009 6:50 PM in response to sboreham

I just purchased an iPhone and I was having the same problem with my network not broadcasting SSID.

I looked for a solution and finally found your thread. It is working so far. Kind of makes sense. If a network connection is hidden during the original configuration, the iPhone will expect it to be hidden.

Thanks sboreham!

Mar 4, 2010 1:14 PM in response to Michael Lowry

Up until now, our 100+ iPhones would auto-connect to our hidden SSID for internal network access without issue (WPA-Enterprise). We have another SSID for guest access that only allows access to the Internet which, until now, we had never broadcasted.

Today we started broadcasting the guest SSID (guest-mode) throughout our wireless network and all iPhones will no longer auto-connect to the internal SSID as they had before. Both SSIDs reside on the same access points throughout the network.

Here's what happens now:
- iPhones do not auto-connect to the internal non-broadcasted SSID
- the guest SSID appears in the list of wireless networks on the iPhone
- the internal non-broadcasted SSID appears, then disappears, in the list of wireless networks
- once the internal SSID appears, the user is able to manually connect to it without issue and obtains the appropriate IP information
- in the network list on the iPhone, the checkbox next to the "connected" wireless network moves between the internal and guest SSIDs as the internal SSID appears then disappears in the list
- during this apparent switching of networks, the IP information does not change no matter what network the iPhone says it's connected to and network connectivity works fine on the internal SSID

To verify this, I disabled the broadcast of the guest SSID and all iPhones again auto-connected to the internal SSID as they always had before.

There definitely appears to be a bug with the iPhone OS that is preventing the iPhone from auto-connecting to a Wi-Fi network SSID that is not broadcast but only when there is a broadcasted network SSID readily available.

No auto-connect to WLAN with hidden SSID

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