Database Users

unable to connect to wifi

hi all i have just bought a 02 xda11i i have a home network consisting of 1 laptop 1 wireless router(belkin54g)the router is connected to my cable modem.i have my laptop upstairs and it connects to my wifi router perfect using wpa/psk but i cant get the xda to connect to my wifi any help would be appreciated as i am about to give up trying thanks in advance.

bump please help

have you tried changing the authentication on the router to WEP which is well tested on XDA’s, or even disabling security just to test connectivity.

hi marc
thanks for replying i think i will try what you say and change my router from wpa 2/psk/tkip and switch to wep as i say my router is a belkin 54g which can run 802,11,b+g my laptop is g and the xda2i is b ive read that if i connect the zda then it will force the router to downgrade from g to b will connecting the zda effect my laptop if they are connected at the same time?allso the routers firewall is on can i leave this on when attempting to connect the zda?as you can probably tell i am a newb at networking,any help from this forum would be a massive help thanks.i am looking forward to having it connected to the web.

you should have your router set to mixed mode. it will not effect the performance with the laptop. firewall will not effect, as long as the relevent ports are not blocked, which they wont be as default. make sure you are not using mac filtering, unless you add the mac address of the router. again this is off by default. although when you get comfortable, mac address filtering + WEP make a good security system. hiding the network ID and giving it an unusual name is best, but a bugger to set up.
strip the system down to bare essentials, then get your device connected, and start adding back. that standard network diagnosis.

marclouis said:
you should have your router set to mixed mode. it will not effect the performance with the laptop. firewall will not effect, as long as the relevent ports are not blocked, which they wont be as default. make sure you are not using mac filtering, unless you add the mac address of the router. again this is off by default. although when you get comfortable, mac address filtering + WEP make a good security system. hiding the network ID and giving it an unusual name is best, but a bugger to set up.
strip the system down to bare essentials, then get your device connected, and start adding back. that standard network diagnosis.
Click to expand...
Click to collapse
agreed!as soon as i have got time i will reset the router and start from scratch i will post the outcome thanks.

remote desktop problem

Hi everyone,
I would like to connect to my laptop next room from local network. I can connect perfectly when I type in my IP address into the first textbox (Computer), but I can't connect when I type in my Computer Name (full computer name) instead. I tried MyPCName as Computer, \\MyPCName as Computer, forwarding port 3389 to my IP, leaving domain name empty, putting in my workgroup name as a domain, putting in my computer name as a domain, putting in myPCName\MyUserName as Username, \\MyPCName as Computer, still the same. It won't connect unless I put in the IP address. I would like to do this since my workplace assigns a different IP to my laptop then I assign at home, but naturally I have the same computer name at both places, so I would like to have a permanent setting for both places.
I'm running Windows 7 64 bit on my laptop and 1.66.405.2 ROM on my HTC HD2.
Many thanks in advance.

can you connect to it ok using another computer? might be a dns issue at a guess...

I can connect from other computers fine. Also on my HD2 I can see the host names of PC's under Resco Explorer and map them. However, remote desktop mobile refuses to work with the Computer Name. I can ping my Laptop's IP and also Computer name from pingbox2. Only in Remote Desktop Mobile there is a problem.

windows 7 by default blocks remote desktop connections from different versions of remote desktop. if you right click computer and select properties, then choose remote settings on the right hand side and select the middle option (accept connections from all verions of remote desktop). havent tried this my self but it solves most issues when using different versions of windows

OK, I sort of figured it but would still appreciate some help. Here is how I got it to work:
I had OpenDNS IP under DNS settings for wireless adapter. I deleted them. If I don't do this, pinging my computer name from HD2 always brings 67.215.65.132, which is opendns and not my true local IP, i.e. 192.168.x.x. I also had to disable the data connection (3G) and only have wireless. If I don't disable 3G, I can only connect with IP and not computer name. Only after doing these 2, when I pinged my computer name, I got the true local IP and I was able to connect with Remote Desktop Mobile using computer name. Now my question is:
1- I don't want to quit using opendns, is it possible?
2- I don't want to disable 3G connection every time, is it possible?
thanks in advance.

For me it works with MyPCName in computer and empty domain, both for XP and 7.

Something seems strange with your phone's networking configuration. At a guess (and this is a long shot), I would check your VPN settings on your phone to make sure you're not connecting to a different domain over 3G as this might explain why it works when you turn off the data connection on the phone and why it works by IP address.
As I said though, it's a long shot and is the only thing I could think of that fits your particular symptoms...

ozkaya said:
OK, I sort of figured it but would still appreciate some help. Here is how I got it to work:
I had OpenDNS IP under DNS settings for wireless adapter. I deleted them. If I don't do this, pinging my computer name from HD2 always brings 67.215.65.132, which is opendns and not my true local IP, i.e. 192.168.x.x. I also had to disable the data connection (3G) and only have wireless. Only after doing these 2, when I pinged my computer name, I got the true local IP and I was able to connect with Remote Desktop Mobile using computer name. Now my question is:
1- I don't want to quit using opendns, is it possible?
2- I don't want to disable 3G connection every time, is it possible?
thanks in advance.
Click to expand...
Click to collapse
about the open dns issues, I suspect that can be solved by making sure your router lets the incoming connection into your home network (you say it resolves to 66.whatever when open dns is used, shouldn't be a problem do long as you don't forget that will be your home ip address so that connection will neef to be allowed through the router and then forwarded by your routers virtual server (our whatever your router software calls out) to your laptops internal ip address.
as for the 3g it should use wifi over 3g by default..... mine certainly does, no need for me to disable it.

tomallen35 said:
Something seems strange with your phone's networking configuration. At a guess (and this is a long shot), I would check your VPN settings on your phone to make sure you're not connecting to a different domain over 3G as this might explain why it works when you turn off the data connection on the phone and why it works by IP address.
As I said though, it's a long shot and is the only thing I could think of that fits your particular symptoms...
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Click to collapse
I think you're right, when the 3G is on (and also Wifi on), Resco shows computers from all around the country when I click computers near me and not my local network. When only wifi is on I can see my local computers. 3G probably has precedence over Wifi? How can I correct this?

samsamuel said:
about the open dns issues, I suspect that can be solved by making sure your router lets the incoming connection into your home network (you say it resolves to 66.whatever when open dns is used, shouldn't be a problem do long as you don't forget that will be your home ip address so that connection will neef to be allowed through the router and then forwarded by your routers virtual server (our whatever your router software calls out) to your laptops internal ip address.
as for the 3g it should use wifi over 3g by default..... mine certainly does, no need for me to disable it.
Click to expand...
Click to collapse
But the 66.whatever address is generic openDNS lookup IP and same for everyone. Are you suggesting me to route this IP to my local IP, i.e. 192.168.x.x? Oh, one more thing, I can also connect when 3g and wifi are both on, but only through computer's IP and not computer name. Can you connect with computer name while both are on and connected?

when your phone does a dns lookup on the name it resolves to the open dns assigned address (not the same for everyone, otherwise the open fns system wouldn't work) so to connect to your computer the phone sends its request to open dns who forward that request to your current actual address.at home that address is your home ip address BUT it isn't your laptops address it is your routers address.(stop reading here if you don't have a router).
so the router needs to be told "if you get a connection request in port (whatever the remote desktop port is) please forward it to (laptop ip address)
its called port forwarding in some routers, virtual server in others.

samsamuel said:
so the router needs to be told "if you get a connection request in port (whatever the remote desktop port is) please forward it to (laptop ip address)
its called port forwarding in some routers, virtual server in others.
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Click to collapse
You're mixing up things a bit - he's not using dns but the computer netbios name. The point is that he has wifi on and connected as well as 3G, thus with an "intranet" ip address on Wifi... so the program/phone should be looking up the name on that connection, where it would find it, instead of looking up over the 3G connection. As the netbios protocol is not routable, it has no chance of finding the computer name over 3G/internet and back home, even with port mappings.

kilrah said:
You're mixing up things a bit - he's not using dns but the computer netbios name. The point is that he has wifi on and connected as well as 3G, thus with an "intranet" ip address on Wifi... so the program/phone should be looking up the name on that connection, where it would find it, instead of looking up over the 3G connection. As the netbios protocol is not routable, it has no chance of finding the computer name over 3G/internet and back home, even with port mappings.
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you're totally right, I have a router and its port is forwarded to my laptop IP, but this is only good (and works well too) when I want to connect from Internet to my local network. I tried OpenDNS exceptions for VPN and defined an exception named as MyComputerName but it didn't work. Then I tried a dyndns solution, but it only works for external connections and not local network, i.e. it can't map local IP's. What I need is a dynamic client which can update my local IP.
I also tried to edit hosts entry in the registry with MyComputerName. It works for a single IP, but I'm not sure if I can write multiple IP adresses (my work and home local IP) into that. If I could maybe everything would be OK.

I've just tried a couple of things and it really works fine for me. If I connect Wifi only, I can remote desktop with the computer name. If I then connect data connection, it still works. Disabling wifi and obviously it doesn't work anymore. Re enabling wifi, it doesn't work at first, but does again after ~30 seconds once the netbios protocol has done its host lookup procedures.
There simply shouldn't be anything special to do.

kilrah said:
I've just tried a couple of things and it really works fine for me. If I connect Wifi only, I can remote desktop with the computer name. If I then connect data connection, it still works. Disabling wifi and obviously it doesn't work anymore. Re enabling wifi, it doesn't work at first, but does again after ~30 seconds once the netbios protocol has done its host lookup procedures.
There simply shouldn't be anything special to do.
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Click to collapse
thank you very much for your time, I appreciate it. You're right in that waiting a bit resolves the issue (it's a bit more than 30 secs for me that's why I thought it wasn't working when 3G is enabled) but only when OpenDNS is not used. I assume you don't use OpenDNS, right? Once I put that one into equation, it takes over NetBIOS protocol and returns its IP instead of the local IP(192.168.x.x). As far as I understand, DNS lookup has precedence over NETBIOS and if the name is not found in DNS it consults NETBIOS protocol. However OpenDNS has this nice "feature" where it finds the name with its own IP. There are several posts about this on its webpage and they say to either disable the typo correction or put exceptions for Netbios names, but sadly none of them works for me right now.

Nope, no OpenDNS, never actually heard of it.
How does it work? Do you enter their DNS server address in the network settings of your pc/phone, or is it an app you run?

you click Start/Settings/All Settings/Connections/Wifi/First Button/Switch to Network Adapters tab/Select Broadcom 802.11 DHD Network Adapter/Switch to Name Servers Tab/Type in 208.67.222.222 for primary DNS and 208.67.220.220 for secondary DNS, click OK. that's all. Could you try if it's not so much trouble? Thanks.

OK, remote desktop doesn't work either with the OpenDNS servers in.
I'm pretty sure it must be a limitation of the remote desktop app itself, as resco explorer can still navigate and/or discover the network shares of my other PCs with no problem. NBTStatCE also finds everybody.
Wouldn't even surprise me, as that Remote desktop mobile has always been troublesome. I don't remember exactly, but in the WM5 days it was pretty much impossible to use on a local network due to a weird handling of names... if I remember well all "local" (NetBIOS) addresses without a '.' entered in the remote desktop app would be redirected to the "Work" connection, while "remote" ones with a period would be directed on the "Internet" connection. As a network card can only be defined as one of them, if you wanted it to work in both cases through Wifi you had to switch the card from Work to Internet and back all the time. And of course when it's on Work it breaks some other things that use the default system handling like mail.

Splashtop Help

I setup splash top for my home network but I need help getting splashtop to work on other networks when I am not at home. Any ideas?

Does anyone have any ideas how to get this to work?

If you got to there website they have instructions on how to set it up for outside networks. It involves setting up port forwarding on your router and getting the main ip address for you internet connection.
http://support-remote.splashtop.com...sys-wireless-g-broadband-router-as-an-example

weems84 said:
If you got to there website they have instructions on how to set it up for outside networks. It involves setting up port forwarding on your router and getting the main ip address for you internet connection.
Connect from Outside - using Linksys Wireless-G Broadband Router as an example : Splashtop Remote - Support
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I have already followed these directions and still get a failed connection. I can connect fine with home network just not a remote network. Also a little info windows 7 with mcafee virus scanner and firewall. I also have a linksys e1000 router. Anybody know why I cant connect?

You may have already done this, but I needed to setup the entire range of ports (6783 thru 6785) to get mine to work. One mapping per port.
Sent from my Transformer TF101 using Tapatalk

You will to add port forwarding rule on your router. Add 6783-6785 for the port. Make sure the splash top software on your pc under network setting is set to 6783. When you add the ip address you need to add your WAN ip address not your machine ip address. Mac address will need to be that machine youre trying to log into. I have splash top setup to three of my computers at home. Able to access them without no issues from outside of my network. If you are still having issues try to disable your mcafee software and firewall. I have all three on Windows 7 all with firewall enable.

dazz87 said:
You will to add port forwarding rule on your router. Add 6783-6785 for the port. Make sure the splash top software on your pc under network setting is set to 6783. When you add the ip address you need to add your WAN ip address not your machine ip address. Mac address will need to be that machine youre trying to log into. I have splash top setup to three of my computers at home. Able to access them without no issues from outside of my network. If you are still having issues try to disable your mcafee software and firewall. I have all three on Windows 7 all with firewall enable.
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Click to collapse
I will try this when I get home from work. How do I make windows my primary firewall?

Dunno about McAfee, but the firewall shouldn't be causing any issues as long as you allow splashtop connection. I set up separate port forwarding for each one. TCP Any -> ****. Did that three times and it connected.

DKYang said:
Dunno about McAfee, but the firewall shouldn't be causing any issues as long as you allow splashtop connection. I set up separate port forwarding for each one. TCP Any -> ****. Did that three times and it connected.
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Some you saing port forward each port as in 6873 to 6873, 6874 to 6874, and 6875 to 6875? Do you have a linksys router?

Router model / make won't make a difference to what ports need to be forward, just how you actually go about doing it.

Well I guess I will try to open them individually.

under999 said:
Some you saing port forward each port as in 6873 to 6873, 6874 to 6874, and 6875 to 6875? Do you have a linksys router?
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Click to collapse
I did "Any to 6873" and etc. Just changed the destination port number for each one since "6873 to 6873" didn't work for me.

Are you guys able to connect to your pc from an outside network with the splashtop thats included in the mycloud or did you purchase it from the market?
I have port forwarding set up, added the pc and WAN ip (not local network ip), enabled "internet discovery" in experimental features on splashtop streamer on my pc and its still not working. I have no options to add mac address, just name, ip, password and port.
Splashtop is now $0.99 so i may just go ahead an buy it so i can use it on my other devices as well if the built in one doesn't support this.

Mine works well...after I set the ports to forward.
However someone did warn me about doing this and lack of security...

fone_fanatic said:
Are you guys able to connect to your pc from an outside network with the splashtop thats included in the mycloud or did you purchase it from the market?
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Click to collapse
Yes, I am able to connect from outside of my network. I am using the one that came with the TF. I believe the one that comes with the TF has a custom resolution of 1280x800 just for the TF. Where the one in the Market Place highest resolution is 1024 x 768. I tried both and the TF version looks much better. There is a area when you have to input the mac address for that machine. My port for one of my pc is "6873-6785"

dazz87 said:
Yes, I am able to connect from outside of my network. I am using the one that came with the TF. I believe the one that comes with the TF has a custom resolution of 1280x800 just for the TF. Where the one in the Market Place highest resolution is 1024 x 768. I tried both and the TF version looks much better. There is a area when you have to input the mac address for that machine. My port for one of my pc is "6873-6785"
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Click to collapse
Thanks for that info. Do you remember where you put the mac address because i don't see it when attempting to add a new computer.
UPDATE
Nvm its working, maybe PC was off when I attempted to connect earlier from outside my house. Didn't need to put in Mac address afterall. Just wan IP and password I set and forward the ports.
Thanks guys

fone_fanatic said:
Thanks for that info. Do you remember where you put the mac address because i don't see it when attempting to add a new computer.
UPDATE
Nvm its working, maybe PC was off when I attempted to connect earlier from outside my house. Didn't need to put in Mac address afterall. Just wan IP and password I set and forward the ports.
Thanks guys
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Click to collapse
Cool glad you got it working. Now, I remember its not the mac address its the Wan address. The most important thing is the listening port 6783,6784, etc,etc,, depend on how many pcs you want to access.

How does a home personal modem get hacked?

I had never had never changed the username or password for the default "admin" settings on my home cable modem/router. So whenever I would manage wifi settings (turn wifi on or off / enable or disable WPS / change wifi ssid or security key) I would just type in the numerical IP address for the modem and it would take me right to my modem's configuration page.
Anyway I recently learned that you need to change the default "admin" username and password for safety. Okay so I did that. My question, when I had left it on the default admin username settings, how was a hacker going to access my modem through a wired connection? I understand if I have wifi turned on, and especially if I have WPS enabled, that hackers potentially can break my wifi code to piggyback onto my wifi for free and they then could access my modem's configuration settings over wifi, but what I don't understand is how they would get to my modem's configuration page if the wifi radio is turned off. I would actually have to be targeted right? I would actually have to be infected with a virus that alerted somebody they've accessed my computer or got through my firewall, and then a hacker would be able to get to my modem's configuration page? Is that how it works basically?

jgolf said:
I had never had never changed the username or password for the default "admin" settings on my home cable modem/router. So whenever I would manage wifi settings (turn wifi on or off / enable or disable WPS / change wifi ssid or security key) I would just type in the numerical IP address for the modem and it would take me right to my modem's configuration page.
Anyway I recently learned that you need to change the default "admin" username and password for safety. Okay so I did that. My question, when I had left it on the default admin username settings, how was a hacker going to access my modem through a wired connection? I understand if I have wifi turned on, and especially if I have WPS enabled, that hackers potentially can break my wifi code to piggyback onto my wifi for free and they then could access my modem's configuration settings over wifi, but what I don't understand is how they would get to my modem's configuration page if the wifi radio is turned off. I would actually have to be targeted right? I would actually have to be infected with a virus that alerted somebody they've accessed my computer or got through my firewall, and then a hacker would be able to get to my modem's configuration page? Is that how it works basically?
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Click to collapse
Is your modem accessible from the outside (Internet)?

MrObvious said:
Is your modem accessible from the outside (Internet)?
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Click to collapse
Yes, it is.

Need to change
You need to change adm user (if possible) and default password, always

People can do a netscan with a LONG range of IP address til they find someone open its very simple to do sadly. But most ISP`s well Cable ISP`s that I know of put there own kind of password in there to where the person that owns it can not get into it. But anything open to the net people find ways.

You'd be better running your own router behind the modem and disabling routing functions on the modem if possible.

MrObvious said:
You'd be better running your own router behind the modem and disabling routing functions on the modem if possible.
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Which side of the modem is physically "behind" the modem?
In between my computer and the modem; or, is it in between the modem and the wall outlet?

hyelton said:
People can do a netscan with a LONG range of IP address til they find someone open its very simple to do sadly. But most ISP`s well Cable ISP`s that I know of put there own kind of password in there to where the person that owns it can not get into it. But anything open to the net people find ways.
Click to expand...
Click to collapse
I see. I am not trying to do anything in particular other then trying to learn about something that has always confused me. (BTW I set up a username and password under the admin settings of my modem and wifi router).
In theory at least, is your computer's firewall still a line of defense if your modem is compromised?

jgolf said:
Which side of the modem is physically "behind" the modem?
In between my computer and the modem; or, is it in between the modem and the wall outlet?
Click to expand...
Click to collapse
Sorry thought that'd make sense. When you say behind, I mean the side from your modem to your network. In front would mean from your modem to the wall to the ISP.

Local attacks to the router can be done by cracking wep which is easy and cracking wpa or wpa2 by deauthing clients to make them reconnect and then grabbing the 2 of the four packets that make up a handshake then using a table of passwords that are common and then run that through aircrack-ng and it calculates hashes and checks to see if they match the handshake.
I think i said that right
anyways you could actually setup a test machine by searching for kali linux and look for a tutorial on cracking wpa2
You need kali linux - a distro of linux that contains pentesting tools already installed and is ready to go
Andthen you need to download a wordlist once in kali
then you should find that tutorial and your off
just make sure you password is in that wordlist
Cheers!
And to answer your question, someone has to have remote access to your computer from the internet to access your modem and routers configuration page when you are wired.

Lgrootnoob said:
Local attacks to the router can be done by cracking wep which is easy and cracking wpa or wpa2 by deauthing clients to make them reconnect and then grabbing the 2 of the four packets that make up a handshake then using a table of passwords that are common and then run that through aircrack-ng and it calculates hashes and checks to see if they match the handshake.
I think i said that right
anyways you could actually setup a test machine by searching for kali linux and look for a tutorial on cracking wpa2
You need kali linux - a distro of linux that contains pentesting tools already installed and is ready to go
Andthen you need to download a wordlist once in kali
then you should find that tutorial and your off
just make sure you password is in that wordlist
Cheers!
And to answer your question, someone has to have remote access to your computer from the internet to access your modem and routers configuration page when you are wired.
Click to expand...
Click to collapse
This is also a good point. Notice he said WPA/WPA2 "common" passwords, or dictionary passwords. If you want a good strong WPA key, go to https://www.grc.com/passwords.htm and put one of them bad boys into your Wi-Fi pass. Make sure you use AES encryption (WPA/WPA2 doesn't matter as much), not TKIP. AES is also called CCMP on some routers. You put that in, and no one will be hacking your Wi-Fi.

How to know if your wifi n cable box is being hacked? And how do u stop it from happening?

[Q] "obtainig ip address" loop, please help

hi guys,
so i bought my Lg g2 yesterday and i can't connect to my wifi network, the phone says obtaining ip address over and over again. i searched the internet and found that is a very common problem. it has something to do with my router so i installed a firmware update. the router (dlink dwl 700ap) is borrowed from our cable company and is already quite old (the newest firmware dated from 2008). since updating didn't work, tried to change every possile setting in the router menu, also didn't work. (i came across a setting saying dchp disabled(by default), tried changing it to enable but some devivces could not connect anymore). i tried some apps from google play but non of them changed anything. i also tried to use static but i could not acces the web (i think the static setting were coorect since i copied them from my "ipconfig" in windows, wath i found weird is that the ip adress of the router said 195.168.0.50 while the ip on my computer said 85.XXXXXXXX.). so i factory resetted my G2, didn't work.
i can connect with every device to my router (s3, ipod touch, lumia 720, iphone 5s) and i can connect my lg g2 to every other network.
so should i return my lg g2, call my cable network or ?
can anyone help me ?
thanks a lot, i really appreciate it
ps sorry for my bad enlish

Turning on dchp will try to auto assign ips so make sure all devices are set to auto or reserve the ip at the router level if you wish some to be static.
As for static ip settings. Make sure the ip you're trying to get the phone isn't assigned.
Default gateway (from the information you've given) 192.168.0.1
Subnet mask is 255.255.255.0
Sent from my LG-D802 using XDA Free mobile app

treebill said:
Turning on dchp will try to auto assign ips so make sure all devices are set to auto or reserve the ip at the router level if you wish some to be static.
As for static ip settings. Make sure the ip you're trying to get the phone isn't assigned.
Default gateway (from the information you've given) 192.168.0.1
Subnet mask is 255.255.255.0
Sent from my LG-D802 using XDA Free mobile app
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Click to collapse
thanks for the quick reply! i used the ip adress of the router (192.168.0.50) and your default gateway and still can't connect the web.
as for dhcp, i really don't understand how dhcp is disable as a default on my router and still every single device can connect and us the internet at the same time

ollielol said:
thanks for the quick reply! i used the ip adress of the router (192.168.0.50) and your default gateway and still can't connect the web.
as for dhcp, i really don't understand how dhcp is disable as a default on my router and still every single device can connect and us the internet at the same time
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Click to collapse
default it should be on. Here in th UK routers ship as such.
Try a different ip. After that it's beyond my knowledge
Sent from my LG-D802 using XDA Free mobile app

treebill said:
default it should be on. Here in th UK routers ship as such.
Try a different ip. After that it's beyond my knowledge
Sent from my LG-D802 using XDA Free mobile app
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Click to collapse
still not working, thanks for trying. wishing i never bought a lg g2 in the first place

Anyone else got the same problem ?

Can you connect to the hotspot on another phone?
Might be a stupid suggestion but since you asked, the password on your G2 could be wrong for your router :/
Sent from my LG-D802

linjes said:
Can you connect to the hotspot on another phone?
Might be a stupid suggestion but since you asked, the password on your G2 could be wrong for your router :/
Sent from my LG-D802
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Yes i can and yes the password is correct (you mean my wpa2, right ?) ?

ollielol said:
Yes i can and yes the password is correct (you mean my wpa2, right ?) ?
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Yeo! Hmm I would say it's a problem with the router, esp since you can connect to other WiFi networks from your phone. Have you tried resetting the router itself? Drastic but I can offer no advice from the settings standpoint
Sent from my LG-D802

linjes said:
Yeo! Hmm I would say it's a problem with the router, esp since you can connect to other WiFi networks from your phone. Have you tried resetting the router itself? Drastic but I can offer no advice from the settings standpoint
Sent from my LG-D802
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yes did a reset, no change. Are you sure it is the router because i never had any problem with it.

I cannot be *sure* of anything but if your phone can connect to other devices perfectly well then the most obvious source of error is the router
You mentioned that toggling dhcp on breaks the connection for other devices - does it fix the connection for your g2?
I took a look at my router settings for static IP address and I have no idea how to set up static addresses haha.. (Not sure how your other devices connect if dhcp is off as I know next to nothing about networking)
Sent from my LG-D802

i had that problem "obtaining ip address" when i use MAC filter, which allow only registered MAC address connect to the router. i registered my LG g2 MAC address to the router and the problem gone.

hi guys
i found the problem
it happens just when you disable auto update in "settings>general>about phone>update center>software update>check automatically"