I'm having the exact same problem! Wifi works fine at home/coffee shops, but dose not work when I'm working at the hospital, which has a large network.
I tried the work around proposed by the Princeton University IT Dept involving turning off Push notifications and mail retreival, but nothing has helped. This is very frustrating and Apple has not helped out in any way. Any ideas??
It seems to potentially be a problem with the DHCP renewing the IP address too often, but I'm not sure.
Thanks to anyone with ideas.
Thanks for your reply.
Yes, I have updated to 3.2.2. I checked the autofill settings in Safari and it was already turned off. The network I'm having problems with is a hidden network with no security settings. iPad will connect with full signal, but allow no internet access via safari or any other app. I tried resetting the network settings and performed a full restore (twice) with no luck. Computer, iPod touch and cell phone work fine on this network. I even called the hospital IT help desk, but they, of course, had no clue what was going on.
Any ideas? Thanks so much!
To fix the "wi-fi connected, but no internet access" try the following:
[Mac Only - "internet sharing configuration"] that is sharing via iMac Airport.
Stage-1.Fix mixed up ip configurations (internet sharing must be turned on)
Check your current Airport ip address if it starts with 192.... or 168... by going to:
System Preferences> Network> AirPort,
a) if it starts with 168... the Status report should say: "Airport has a self-assigned IP address and may not be able to connect to the internet."
b) click on the "Advanced..." button (lower right coner)
c) click TCP/IP
d) change "Configure IPv4" to "Manually"
e) set "IPv4 Address" to 192.168.1...... ( please check your ethernet IP before punching in the values)
f) Subnet Mask: "255.255.255.0" and click "OK"
g) click "Apply"
After applying, AirPort should have a "green" dot by it and the Status should say: "AirPort is connected to AirPort Network and has the IP address 192.168.1.4." Now we've fixed the IP Problem.
Stage-2 Fixing "Firewall settings"..Check to see if your firewall is blocking any incoming connections.MANUAL TESTa) enter your iDevice Wi-Fi setup and choose "Static"[ Settings> General > Wi-Fi > b) under Choose a Network..." select your wifi name and touch the blue "arrow" to change the "IP Address" manually.c) select "Static" and in put the values used in your Wi-Fi setup. eg:
no try browsing the internet, if still it does not work, get back into the wi-fi setting and tap the DHCP tab and let the iDevice automatically generate values, if the IP Address still start with 168... and the Subnet Mask 255.255.0.0, we can be sure that our firewall is blocking incoming connections.
Now we are sure that the firewall is blocking incoming connections, lets jump to stage-2.b
Stage-2.b Fixing "Firewall settings"..
1) Open "Finder" and hold "cmd"+"shift"+"G" to open the "Go to the folder:" dialogue and type in the following strings or copy paste: /private/var/log/appfirewall.log
2) click "go"
3) right click the "appfirewall.log file and "open with" your defalut text editor. (leave open)
4) now open "System Preferences" > "Security" > (if your firewall is locked, click the padlock to permit changes and enter password if prompted to do so). "Advanced..." (this should bring up a dialogue in which we will allow our blocked wi-fi settings.)
5) In the text editor scroll down to the current time and date event value.
6) quickly jump to your "Network" settings pane in the system preference and click on AirPort in the left pane(make sure your Status reads ""AirPort is connected to AirPort Network and has the IP address 192.168.1.4.".
7) go to your iDevice and connect to the internet through your wi-fi and monitor the "text editor" to see if there are any changes to the file as in "requesting a file update or reload" just allow it.
7b) if there are no changes, turn "AirPort off" and after 10 sec, turn "AirPort on" the "appfirewall.log" file should have an update or reload request.
save the file and check which value is being blocked based on turning AirPort on and off. once you have determined that, (in my case the line was: May 1 20:16:19 iMac-Hynes Firewall: Deny named data in from 10.0.2.4:58458 to port 53 proto=17)
and the value being blocked was: May 1 20:16:19 iMac-Hynes Firewall: Deny 'named' data in from 10.0.2.4:58458 to port 53 proto=17)
8.b. after determining the blocked value of the AirPort incoming connections...
9. go back to the "Firewall" settings,("System Preferences" > "Security" > (if your firewall is locked, click the padlock to permit changes and enter password if prompted to do so). "Advanced..." (this should bring up a dialogue in which we will allow our blocked wi-fi settings.)
10. search for the value you discovered being blocked(eg: "named"... or waht ever yours is...) and check if there is a "Block incoming connections" if there is...good. Just click on the arrows at the end and change the values to: "Allow incoming connections".
11. be sure to uncheck "Block all incoming connections" if checked at the top of the dialogue before clicking ok.
12. after clicking ok, click the padlock to prevent further changes and close the systems preference
Turn AirPort on if it was off and connect your iDevice and voala!!! you are surfing the net...! Hope it works for you all
Thank you SO MUCH. I have been searching for a solution to this problem for almost a week (haven't called anyone or gone to Apple though because I'm out of the country). However, I owe you my sanity. This should be the response to every single inquiry about this problem in relation to the 169. IP issue.