09-19-2016 10:05 PM
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  1. khaldoon's Avatar
    hello; i have the same problem at work , i have no access to the modem, did you find any solution that can help me?
    Thanks
    10-02-2013 02:14 PM
  2. Ole Jestrum Betron's Avatar
    I had my problem on.. just change the pass word of your SSID then try to log.on again on the network
    10-08-2013 06:19 PM
  3. Ole Jestrum Betron's Avatar
    just change the pass word of your network SSID then reconnect agani
    10-08-2013 06:20 PM
  4. Matthew Shaw1's Avatar
    Very strange bug here however I'm confident I have identified the issue (not the root cause).

    I have a Samsung S4 mini
    I have a Vigor Wireless Network router that has multiple SSID's running on it.
    One SSID is secured by MAC Address filtering and an other is not.
    Both SSIDs run on the same Frequency/Channel.

    My S4 only connects to the SSDI withOUT MAC address filtering. As soon as I enable MAC address filtering (and grant the S3's MAC address to the network), the device can no longer connect, I get the 'Authentication error'

    I conclude the S4 is unable to connect to Wifi access points with MAC address filtering enabled. Very odd as you would expect that to be only a 'server' side issue one that shouldn't affect a client. But there you go - bugs for you are strange at times!
    10-22-2013 03:18 PM
  5. psadhu's Avatar
    I hope this helps someone. I got my new NEXUS 5 and it did not connect to my router which is Linksys wrt54g - it would just keep spinning from authentication to obtaining IP and never connecting.

    I then switch the router to WPA TKIP and it worked fine. But this is not the mode I want to run my router, SO, I decided to return it/exchange it. Moreover, all my previous Andrioids worked great with it.

    As a last attempt I looking at several things and it stuck me that the firmware was old. So I just upgraded the firmware on my router. VIOLA, it just seems to work now.

    Am not sure if the phone is still defective because, in my opinion, any phone should work with any wireless router manufactured in the last 5 years.
    11-05-2013 11:46 PM
  6. bobdobbs2's Avatar
    I was able to fix this on my meru infrastructure by disabling 'virtual port'. Hope this helps.
    http://www.merunetworks.com/collater...e-cost.pdf.pdf
    12-02-2013 06:00 PM
  7. crescent1967's Avatar
    My family just purchased 4 Galaxy S4s last week and didn't have any issues connecting to our wireless home network until this afternoon - laptops and tablets were able to connect to wifi fine, but not the phones. I tried forgetting the network and re-entering the password to no avail, but solved the problem by unplugging my Comcast router and removing its battery pack, and then re-installing battery and restarting router.

    I was then able to connect the Galaxy S4s to the network again without any problems.
    12-03-2013 08:08 PM
  8. Girmay Gebre's Avatar
    Tap WiFi button ..hit forget and connect again works fine for me.. thanks
    12-20-2013 07:13 AM
  9. Krishn Garg's Avatar
    I have samsung S3 and it connects fine with wifi at home but do not connect at work it gives authentication error occurred with Incorrect password while other phones are connecting to network as well.
    Any suggestion what should i do?
    01-07-2014 04:05 AM
  10. devlindj's Avatar
    Thank you very much for this idea. I have a Galaxy 4 mini. I LOVE this phone, but was very frustrated because it wouldn't connect to my ATT 2Wire at home. However, several ipads, a Galaxy note 10.1, iphones, computers all could connect. And the other Galaxy is on the SAME version of Android OS as my Galaxy s4 mini (4.2.2). I don't know what the problem is with the Galaxy s4 mini, but entering its MAC address into the router did allow it to connect. Sadly, I cannot do that at other locations where I don't control the router, but at least at home, I can use wifi.

    And thank you for the reminder that the ATT 2wire automatically moves manually entered MAC addresses to the 'blocked' column. I entered the address, then moved it from 'blocked' to 'allowed.' Clicked on 'save.' And immediately my galaxy mini is able to access my home wifi!
    01-10-2014 09:39 AM
  11. Justin Lotz's Avatar
    I have the same problem. I click connect and my phone just almost immediately cancels the connection progress. I just got a new router from Cisco. Is that a possible problem ( the router)?
    01-10-2014 10:08 AM
  12. Twason Wiser's Avatar
    Your problem is not with your routers at all. You are however fixing the problem in a round-about way by changing the router, or the SSID, or the address on your S4.

    The real problem all of you are experiencing is that the S4 does not release it's DHCP address after the DHCP lease has expired. Once your S4 is in this state of still having a DHCP address with an expired lease, there is a bug in Samsung's code that does not release the address, or renew the address, or request a new one.

    The IP address is stored in a files located on your S4 at: /data/misc/dhcp/dhcpcd-eth0.lease and /data/misc/dhcp/dhcp_list

    Power off the S4 completely, pull the battery, or connect to a different SSID, or make it a static address, and your S4 will work.

    Only if Samsung fixes the bug with the DHCP lease timeout, will the S4 ever work correctly though.
    02-25-2014 12:30 PM
  13. WokingWounded's Avatar
    Your problem is not with your routers at all. You are however fixing the problem in a round-about way by changing the router, or the SSID, or the address on your S4.

    The real problem all of you are experiencing is that the S4 does not release it's DHCP address after the DHCP lease has expired. Once your S4 is in this state of still having a DHCP address with an expired lease, there is a bug in Samsung's code that does not release the address, or renew the address, or request a new one.

    The IP address is stored in a files located on your S4 at: /data/misc/dhcp/dhcpcd-eth0.lease and /data/misc/dhcp/dhcp_list

    Power off the S4 completely, pull the battery, or connect to a different SSID, or make it a static address, and your S4 will work.

    Only if Samsung fixes the bug with the DHCP lease timeout, will the S4 ever work correctly though.
    The above explanation is way above my pay grade. However, in my set up at home I have two routers (different brands and models) at opposite ends of the house. One has access to the internet and performs DHCP functions and the other is set up as an access point. Both routers are dual frequency and are set with the same SSIP and passwords as each other (but on different channels) but different SSIPs are used for the 2.4 and 5GHz bands. Now here's the thing: with 5GHz switched off the 2.4GHz set up works perfectly with clients automatically switching to the strongest signal as one moves round the house. Configured with 2.4GHz off and 5GHz on I get the authentication error problem. I can't say for sure it's a Samsung problem since the only 5GHz capable clients I have are Samsung phones and so I haven't been able to test using other clients yet. I spoke to Samsung support yesterday and managed to crawl my way up the tree a bit to someone who undertook to refer the issue "to HQ" and get back to me (I'm not holding my breath)......
    02-27-2014 04:02 AM
  14. Peter Kelly2's Avatar
    I just don't understand how much more security you need filtering the mac address. If you WPA2/WPA enabled in your router and you have the firewall enabled in the router and perhaps some kind of firewall in your cell phone like LOOKOUT, what more security you want ?? When you filter the mac address all you are doing is making is this : Only computers on the MAC Address filter list will have access to the wireless network. Therefore, I don't think this procedure is giving you any extra security. The way I set up my cell was after activating wifi I had it scan for networks and once it found mine I imputed the password and applied the security to be used and that was it. Now the cell's mac address appears in my router as a device with permission to use my network but I am not filtering the mac. I don't feel the need to do it since it is my own network for which I only have access. I think that you are only creating unnecessary problems for yourself..... I am just saying.
    Ok so I had to reply to this it bugged me.
    A password can be bruteforced with enough time (There are many windows/linux packages that do this). Adding MAC filtering adds another layer, bearing in mind that once someone has authenticated onto your wireless network they have a lot more access to the devices on the network, including intercepting communications e.g usernames/passwords etc. Adding MAC Filtering is not over reacting especially in the modern times.
    04-12-2014 02:44 PM
  15. metle_geek's Avatar
    I just got a Samsung Galaxy S4. As I have always done with all of my devices that connect wirelessly, I went into my D-Link software and added my phone's MAC address to the network filter list. The security settings are WPA/WPA2. When I try to connect, the phone is able to see my Wi-Fi network, and it asks for my password, which I enter. It keeps trying to connect, but then it says an "authentication error occurred." I have checked and triple-checked the password, and it is correct. I have also checked and triple-checked the MAC address, and it is correct. I have rebooted the router and the phone several times each. Any suggestions on resolving this? I am an ordinary consumer, not a geek by any means :-) -- please state your response accordingly. Thank you!

    - Tina
    Seems samsung kernels have issues connecting to wpa/wpa2 I would suggest running a guest portal and running a different encryption to test this

    Sent from my SAMSUNG-SGH-I337 using AC Forums mobile app
    04-12-2014 05:00 PM
  16. Someone woth S4's Avatar
    Hi there,

    Just another thought from someone who tried everything with no success and was able to resolve the issue with a simple thing that I should have thought of long ago.

    I was about to return my new S4 when I decided to go through my router settings one more time. I discovered that I had Access Control on in Advanced Wireless Settings. I turned the access control off, and my phone (Oh, miracle!) has connected to Wi-Fi. At the same time, I was able to see it as one of the connected devices in Access Control. I added it to the allowed devices and turned Access Control back on. Now the phone is connected and everything is working properly.

    - - - Updated - - -

    Hi there,

    Just another thought from someone who tried everything with no success and was able to resolve the issue with a simple thing that I should have thought of long ago.

    I was about to return my new S4 when I decided to go through my router settings one more time. I discovered that I had Access Control on in Advanced Wireless Settings. I turned the access control off, and my phone (Oh, miracle!) has connected to Wi-Fi. At the same time, I was able to see it as one of the connected devices in Access Control. I added it to the allowed devices and turned Access Control back on. Now the phone is connected and everything is working properly.
    06-28-2014 11:59 PM
  17. Aziz Seleem's Avatar
    Galaxy Mega - authentication error occurred ( علي موبايل wi-fi- networks - والاتصال بالنت معطل - أرجو الافادة بالحل
    07-06-2014 04:12 AM
  18. crfd's Avatar
    i got the same problem with my Galaxy Note 10.1 (GT-N8020). I was thinking its hardware issue.
    its connecting perfectly when its very close to my NETGEAR Router. But this was happen recently. its was working perfectly

    Do we have a solution for this issue?
    07-25-2014 08:02 AM
  19. horangeh's Avatar
    Some people resolved the WiFi problem on S4 by uninstalling the AT&T Smart Wifi utility. Read the comments from Jan/Feb/March 2014 here:
    How to Fix Samsung Galaxy S4 WiFi Problems
    07-25-2014 08:41 PM
  20. Edward Coleclough's Avatar
    Download a WIFI Fixer/troubleshoot app from the playstore. It worked for me.
    09-14-2014 06:29 PM
  21. kk1l's Avatar
    From WorkingWounded:
    The above explanation is way above my pay grade. However, in my set up at home I have two routers (different brands and models) at opposite ends of the house. One has access to the internet and performs DHCP functions and the other is set up as an access point. Both routers are dual frequency and are set with the same SSIP and passwords as each other (but on different channels) but different SSIPs are used for the 2.4 and 5GHz bands. Now here's the thing: with 5GHz switched off the 2.4GHz set up works perfectly with clients automatically switching to the strongest signal as one moves round the house. Configured with 2.4GHz off and 5GHz on I get the authentication error problem. I can't say for sure it's a Samsung problem since the only 5GHz capable clients I have are Samsung phones and so I haven't been able to test using other clients yet. I spoke to Samsung support yesterday and managed to crawl my way up the tree a bit to someone who undertook to refer the issue "to HQ" and get back to me (I'm not holding my breath)......

    I see the thread is 1 yr old, however I see exactly this issue with my Galaxy Tab 8. Connected to the 5GHz N-only radio I will get an "authentication error" after about 5 minutes of being connected. When I switch to the 2.4GHz side I will not get the authentication error. I will see the device reconnect every so often, but on the 2.4GHz side it succeeds. I am not sure why there are retries. (I watch this by keeping the WiFi settings open on the Tab).

    I am within 10' of the access point and see 45dB to 50dB of signal above the noise floor on the router display, so signal is not the issue.

    Did you ever get a reply from Samsung??

    Ron
    01-08-2015 10:14 PM
  22. thedude0156's Avatar
    I have a samsung Galaxy 4. I can connect to the wifi everywhere but at work. I have worked with the tec department and there has been no changes since it did work 2 weeks ago. DId a factory reset and still not connecting. I am open to options or what to install to fix it
    09-19-2016 10:05 PM
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