Database Info

Wifi+DNS on XDA Mobile 6

I rarely post questions because most that I have had have been answered already and I can find what I need through searching.
However the amount of apparent confusion in the questions and answers on this subject has made it impossible to figure this out.
I cannot reliably connect via wifi on my Wizard running XDA Mobile 6.
Problem:
1. Wizard connects to Wifi, but does not correctly get DHCP.
Okay, a pda is pretty useless as a wifi device if it can't receive a dynamic address, but I set up a static IP (on the Wizard) to work with my router, and deferred diagnosing this until after I actually have wifi working at all.​2. Wizard cannot seem to choose a DNS server.
It apparently tries to use the GPRS dns server to resolve addresses, and can succeed, but this is slow. If I disable the phone it uses the DNS I entered (my wifi router). and works precisely as it should, resolving domain names almost instantly, just like the other wifi devices on my network. With the phone turned on the DNS address seems to be ignored​
Is there someone out there who can address this problem? Maybe I need a primer in the serpentine methods Windows Pocket PC uses to configure itself to connect to networks, because it certainly doesn't seem the least bit logical from this writer's perspective.
Thanks.
Le Zouave

Yes, I had the same issue with most 6.0 ROMs here. But TNT 6.0 ROM works without changing DNS manually. Haven't checked the root cause is ...... You might install TNT ROM to see whether it resolve your issue.

That's some kind of DHCP problem.
I don't have it with my cooked ROMs.
When DHCP is used to get an IP address, it also gets the DNS servers sent back in the same response packet. So if you disable DHCP (or it fails) you need to manually configure both it and the DNS addresses.

Exactly my point.
It's clear that the problem is a DHCP client failure. There are plenty of posts here saying things like, "try a different ROM" etc. The information I am looking for is how to fix it.

Uh, try a ROM that doesn't have the problem?
The ones I've run (including my own cooking) work fine.

oops- double post

I was sort of hoping for a registry key to edit or other setting...
DHCP is working, for example on Remote NDIS-host (activesync connection), so it seems likely that there might be another solution.
I will have a look at your ROM, Genesis3.,

Touch Pro DNS not working

I have an HTC touch pro with the latest verizon ROM.. this is the second time that DNS has stopped working. i can go to websites by numeric IP but not by name. no applications work that use a servers name.. ie:google maps: aim..
last time i fixed it by reinstalling the rom and redoing my whole phone but i dont want to do that again just for it to happen again next week.
I have an IP utility on the phone and the phone has dns servers listed .. it just isnt performing dns. Last time ity happened i tried manually adding open dns servers and it still didnt work. Please Help.

Nevermind I figured it out. The Phone was holding the wifi ip address/dns info from when i had used wifi earlier. i went to settings.. connections.. wifi and changed from a specific IP address to obtain address automatically and now it works fine.

School wifi problem

Just got my Samsung Captivate about a month and I got my wifi connected to the school network, but when i open the broswer or any apps need internet i didnt get any connections? at the first week it works.. and when connecting to the school wifi it should be come out with the school login page,, then the internet will work.. however the wifi is connected doesnt matter how strong the wifi singal is.. it just cant load and cant bring me to the login page..
I really need help..
and the wifi works everywhere.. except my school...
btw my friends iphone 3gs works..

I am also at college and have had the same problem. the best reason I have found is the phone itself. half of our wifi is an older standard that does not work on the phone. it shows up as wep and i can not get it to recognize it as 802.1x . in my tinkering I have also messed up the wifi that was working.
long story short it probably won't work. I have spent a long time trying to get it to work with no luck
Sent from my SAMSUNG-SGH-I897 using XDA App

Hello to both of you,
I also attend a college with an 802.1x connection and the captivate supports most of these networks; however you will probably need to configure the network settings manually (usually retrievable on your schools IT site). If you dont mind digging up your settings I would love to check to see if I can configure your phone.

FYI, you might be having a problem similar to what's seen in this post.
http://androidforums.com/captivate-support-troubleshooting/142397-odd-netmask-issues-wifi.html

I definitely had this problem today. It appeared connected but no web pages would load. Going to have to investigate further. Why can't things just work

I know my school recently implemented some new security certificates that you must agree to before logging in, has anything like that changed for you? My wife's Aria is running 2.2 and can log into the school network, but my captivate cannot. It is frustrating I know.

Seems some colleges and universities are noticing issues with android devices letting the DHCP leases to expire but keeps using the IP address assigned instead of requesting a new one.
See the following links.
h t t p ://www . natecarlson . com/2010/08/27/android-att-captivates-wifi-networking-is-broken/
h t t p ://www . net . princeton . edu/android/android-stops-renewing-lease-keeps-using-IP-address-11236.html
I actually have similar issues with my Belkin wireless router at home. My laptops and other wireless devices have no problems connecting or re-connecting but the Captivate just refuses to re-connect after the connection was terminated. Even after resetting the router, the phone just keeps trying to use the same IP address for some reason.
The only way I could get it to reconnect is to either reboot the phone or to remove the AP entry which is a pain especially if you have wireless passwords.
Hopefully someone with better insight into how Eclair and Froyo handles WiFi can come up with some fix.

more solutions?

I believe the new 2.2 firmware solves this issue. I too am at College and my captivate FAILS to actually access the internet through wifi unless I statically assigned the IP.
I just updated to Froyo and it connected instantly. I'll have to do more testing to make sure, but I think Samsung finally fixed it.

captivate wifi issue at school
i just got Galaxy S (Captivate) and wi-fi is giving trouble.
when i tried at a university campus, it gives error and says can't open and try again later. it is like, i get connected to the network, IP and DNS and everything is generated. But when i open browser to open a website, instead of taking me to login page it gives the above error.
here is what i get when i try to open a website.
'web page not available'. the page might be temporarily down or it may have been moved permanently to new address.
here are some suggestions:
- check to make sure device has signal and data connection. (I made sure it is connected to wifi)
- reload page later. (i tried after 5 mins, same result)
- view cached copy from google. (doesn't work either)
i am not able to understand why is this happening. i tried restarting the phone after connecting to wifi but no luck. any pointers?

Sounds like they use a portal system which requires logon and doesn't play nice with the Captivate's browser. Unfortunately many such portal systems are written poorly and I've even seen some that only work with Internet Explorer.
You could try a different browser on the Captivate. Dolphin allows spoofing assorted User Agents, which might help.

Hey guys, I have the same problem connecting to m school's network login page. It would say connected but the website always says cant be found. But the good news is that I found a way to connect to it manually! What you need is your captivate and friends iphone 4 or 3gs. First have use your friends iphone to connect to the wifi and then go into wifi settings. You should see 2 DNS address, Ip address, netmask (subnet mask) and router address. Now jot those addresses down except the ip address. Go to settings->wireless and network->Wi-Fi settings->now tap the bottom left button under the samsung logo and click advanced. Now check use static ip. Do not enter anything for your ip address just yet (we will do this last). Now enter router address into gateway, subnet mask into netmask, DNS1 to DNS1 and DNS2 to DNS2. ok when you are done click back and tap the network you want to connect to. Once you are connected jot down your ip address by taping the network once more. now go back to where the static ip was and input the ip address you just jot down into the ip address underneath use static ip. Disconnect and reconnect to the desired network. You may have to do this a few times or reboot your phone. This has been working for me so far around different buildings but with the same school network connection. I hope this helps cheers!

sremick said:
Sounds like they use a portal system which requires logon and doesn't play nice with the Captivate's browser. Unfortunately many such portal systems are written poorly and I've even seen some that only work with Internet Explorer.
You could try a different browser on the Captivate. Dolphin allows spoofing assorted User Agents, which might help.
Click to expand...
Click to collapse
Yeah, my school uses the Bradford dissovable agent. Funny thing is, some connections work perfectly, others not at all. Technically none should work, and sometimes I feel that maybe I should tell them that sometimes somehow it is possible to bypass the whole agent thing- but why rock the boat just yet

Does it need a proxy to work? If so, this app is amazing.
http://forum.xda-developers.com/showthread.php?t=766569

I figured it out a month ago, and it is actually petty easy. But you really have to change ip address manually, usually just the last number.
Sent from my SAMSUNG-SGH-I897 using XDA App

[Q] Adding L2TP/IPSec PSK VPN

I am trying to set up L2TP/IPSec PSK VPN on my Transformer, but after I fill out the credentials and hit the back arrow, the VPN is not added. I have not added a L2TP Secret (left this disabled).
I have been able to add a PPTP VPN (as a test), but I need the L2TP/IPSec PSK VPN for my corporate network.
Any suggestions?
Thanks in advance.

As an aside, I have the same issue with my EVO (Gingerbread), so I am assuming it is user error.........

When you are creating the VPN profile you need to use the Menu/Save option rather than just pressing the back button otherwise your changes will be lost.

Thank you so much, I knew it was probably something simple I had overlooked.

Matchstick said:
When you are creating the VPN profile you need to use the Menu/Save option rather than just pressing the back button otherwise your changes will be lost.
Click to expand...
Click to collapse
Hello anyone where is the menu/save option?
Forgive me Just cottoned onto that!!

Theres a button in the top right corner. Press it and the save option will pop up.
Sent from my Transformer

Hey all,
I have VPNC installed on my transformer with my work Nortel VPN setup as preferences.
When trying to connect I get:
response was invalid [1]: )ISAKMP_N_INVALID_EXCHANGE_TYPE)(7)
And if you look in the notification bar you quickly see VPN Widget Switched Off.
Is this just that my work Nortel VPN does not support this?
I am running Prime 1.8.4.

Try this? Worked for me and my VPN needs
http://code.google.com/p/get-a-robot-vpnc/

I tried that as well (VPN Connections) and i get a "failed to connect" error.

authentication via proxy server was unsuccesful

anyone of you here using a proxy server in a university? when i move to a different building in the same university, i cannot browse anymore because it says "authentication via proxy server was unsuccessful".
our proxy server does not require auntentication.
android 3.2 from our tablet has already a built-in proxy settings, why is this happening to me when when i move to a different building with the same proxy server?
any help from this will be greatly appreciated.
thank you in advance.

I don't have any issues in my University using the WiFi =/

i dont know why it is happening to me? the tech from the university said maybe its due to number of devices accessing the wifi proxy at the same, thats why i cannot connect. but i had my rooted lg optimus black before and its running smoothly in the university's proxy server!
i think there is something wrong with android 3.2's wifi proxy?

There are wifi-related issues with some of the Galaxy Tab 7 Pluses, (namely the SOD,) but this one is new to me. I've never experienced it. Truth be told, the tech could be correct. The proxy server might have been refusing connections due to heavy load. Even if you think your phone and tablet are connecting at the same time, the phone could have made its request earlier and been the last allowed device, or if you connected after, could have taken up a spot that was just vacated by another device.
My question is then, is this an ongoing issue? By this I mean are you having this issue multiple times in the day, where your phone can connect just fine, but your tablet is throwing that error message?

thank you for your reply, rkmj!
yes, this is an ongoing issue up to now! i have been experiencing this for over a month already. when im the main library i can easily connect at the first time. but when i move to the other buildings within the same proxy server, with definitely different access points it always says:" authentication via proxy server is unsuccessful". i am using my rooted lg optimus black with this same positions in the university before, and it works flawlessly, so i doubt if it is with the heavy load?
so is there something wrong with the proxy setup of honeycomb 3.2?