I have various machines on my lan in 192.168.1.*, I have a local DNS server to give those machines names. This normally works great, but my new Samsung Galaxy S21 sometimes says "cannot access" when I point it at a web address of a server running on my lan. I'll use a network utility app to do a DNS lookup of the other system, and it will tell me the correct address, then I'll use the same network utility to do a traceroute, and it will try to talk to a local IP I do not have in my network, in my DNS database, or anywhere in the set of addresses my router knows about. Where does this ghost address come from? Does the phone imagine that is the gateway it ought to be using for some reason? (The router's DHCP server certainly doesn't claim an unknown address is the gateway).
Every time I start trying to investigate the problem in more detail, everything suddenly starts working perfectly.
Does this ring a bell for anyone? Any clue what is going on? Maybe I should assign my phone's network statically and see if it works better.
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I'm connecting with my HTC S710 to a WiFi with a static IP. The WiFi connection is set, I can ping other devices within the network but I can't view web pages and synchronize mails. I did lot of tests and I found that the problem is DNS! When I use IP address instead of www.something.com I can view the WWW site!
Does anybody know how to set DNS in my smartphone? DNS address is the same as gateway's in my case.
There's no possibility. Either you activate DHCP on your WiFi Gateway or you use a third party software that allows you to define WiFi profiles.
Does this one work for you? http://www.freewarepocketpc.net/ppc-download-wifi-profiles-v0-0-2.html (although it is originally designed for PPCs)
Hallo fwmone,
thanks for your post!
I have just installed the Wifi Profile program but it's for PPC so there are problems with filling in the right values. I hope I'll be able to figure out how to use it. Anyway the programmer is also Czech so I've wrote him an email asking whether he plans to build Smartphone version..
The wifi I connect to is a local provider and unfortunately he uses static IPs
I'm really surprised that Vox doesn't have such a simple thing like DNS manual settings.
Yeah, the static IP functionality is quite useless without the possibility to set a DNS server.
Means "local provider" you're using some type of wireless internet at home or is it at a location where you can't control the situation? As long as you're using the service at home, you might install a WAP that works as a repeater for the WAN and offers DHCP functionality.
Hi fwmone!
So the problem is solved! The application WiFi Profiles v0.0.5 helped. Despite it's for PPCs it is possible to use it and to set all network configuration including DNS. After applying the profile the connection works fine! GREAT!!
Thanks for your hint!
FYI: that local provider covers our street and I don't control the router/access point. But you're right WAP repeater would be also a solution.
Nice that it worked!
I have a 16-node network (used mostly as a cluster computer for meteorological work), Ethernet, 3 switches, all through an ActionTec DSL gateway/router. There is an edge machine with dnsmasq for dns cache'ing and firewall. My ISP assigns three IP addresses, one of which is my network's gateway address. The ActionTec has DHCP turned "on" although I use SNAT, DNAT, and masquerading on my side. I use my internal network to serve an Apache Web site as well.
The Wi-Fi (and other reception, for that matter) is not very good here, so I bought a TrendNet TEW-636APB Wireless Access Point. It's plugged into one of the switches. The Linux hosts and hosts_files are correctly configured and dnsmasq is configured to assign an IP Address to the TEW-636APB based on its MAC.
Everything works just fine, but most importantly, the HTC One (T-mobile) has no Internet connectivity, even though I can read the IP Address assigned to the phone. Everything is on the same subnet, by the way.
Any suggestions to get Internet up and running? I regularly use bash and c-shell as well as other languages but this one has me stumped. Any suggestions?
Mike
Minneapolis, Minnesota
Additional Info for Wi-Fi Issue
I ruled out some issues in the meantime. The TEW-636APB seems to work fine. I changed each of the config options: same problem. BUT, a laptop connected using Wi-Fi for data works just fine!
On the smartphone (that HTC One), the only URL that connects is on my own network, that is, the Web site served on my subnet and inside my network works just fine. Anything outside of my network fails.
When I turn off Wi-Fi on the cell phone (and use T-Mobile), the Web works just fine.
Very confusing. Any suggestions?
Michael
Might be a DNS problem...
wxmanmichael644 said:
I ruled out some issues in the meantime. The TEW-636APB seems to work fine. I changed each of the config options: same problem. BUT, a laptop connected using Wi-Fi for data works just fine!
On the smartphone (that HTC One), the only URL that connects is on my own network, that is, the Web site served on my subnet and inside my network works just fine. Anything outside of my network fails.
When I turn off Wi-Fi on the cell phone (and use T-Mobile), the Web works just fine.
Very confusing. Any suggestions?
Michael
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Click to collapse
Hi Michael,
It seems to me like this a DNS problem, you should try opening google using it's ip address ( try using http ://173.194.35.132/ ) to check connectivity. Also if your phone is rooted you should be able to use some terminal like tool and try to ping some hosts to rule out the dns problem.
Cheers,
Stefan.
P.S.: please use thanks if information was helpful
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I had a small quarrel with my stepfather, and then he didn’t let me access the home internet. When I try to connect to our home wifi normally, it says "obtaining ip address" and loops for minutes until it says "failed to obtain ip address." But when I try to connect by setting static ip from my phone, it connects immediately but says " no internet." I assumed he might have blacklisted me, but I am unable to connect even my laptop and other phones. Suspecting that my stepfather had enabled whitelist or MAC filtering, I tried to spoof MAC address using kali linux, but I couldn't connect to the wifi with spoofed MAC. I need internet but my stepfather won't listen to me. Since he is not in home right now and won't return for a month, I don't have a connected device to access the setup page and see the settings of our Digicom ( DG-M342T) router. I am also unable to physically access the router but I have the password( Authentication type - WEP). How do I fix this? I would really appreciate your help.
You could download the router's management app and then view the connected devices list on your phone. Check your router's setup guide to see which app you need to download.
jwoegerbauer said:
You could download the router's management app and then view the connected devices list on your phone. Check your router's setup guide to see which app you need to download.
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I can't access the setup page by typing 192.168.10.1 in the url or from other Router management apps on the play store. It says " Can't reach the page." I also checked the guide where it says to open admin page by typing 192.168.10.1 on the browser , but there is no mention of any management apps.
Making changes to your router you’d need to know the IP address of the router. A list of wellknown router IPs here:
How to Find Your Router IP Address in 3 Steps | ExpressVPN
Learn what an IP address is, the differences between a local and public IP address, and how to find your router’s IP on Windows and Mac.
www.expressvpn.com
jwoegerbauer said:
Making changes to your router you’d need to know the IP address of the router. A list of wellknown router IPs here:
How to Find Your Router IP Address in 3 Steps | ExpressVPN
Learn what an IP address is, the differences between a local and public IP address, and how to find your router’s IP on Windows and Mac.
www.expressvpn.com
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Click to collapse
Thanks for your reply jwoegerbauer. As I mentioned earlier in my post, if I connect to wifi just by typing password, it loops "obtaining ip address" for long period, and therefore I have to set static ip address through the advance setting of wifi just to connect to it. My router's local ip address is 192.168.10.1 . I used to access the admin page before the restriction through this ip address. But now it says "Can't reach the page." The problem is about not being able to access internet and admin page after connecting to the router.
Clear your local DNS cache to make sure you have the recent version from your ISP for 192.168.10.1. For Windows machine, you can do this by going to Start > Command Prompt > Type ipconfig /flushdns and then hit Enter.
Assumed that router's IP really is 192.168.10.1 and it still doesn't work then maybe ISP is blocking it. You may try to use an alternate DNS service such as Cloudflare for example.
I flushed the dns in windows. Now I can connect to the wifi without setting statip ip (in windows), but I still can't access internet. If I try to open any website, it says "
Hmmm… can't reach this page" and then says "You are not connected." I installed cloudflare WARP in windows but it was no use , since it requires internet access to function.
These are the screenshots of my android to explain what exactly happens:
1. When I try to connect to wifi just by typing it's password (loops at "obtaining ip address")
2. Setting the static ip manually
3. Instantly connected after setting static ip
4. Connected but No internet
5. Can't access router setup page
Cloudflare Warp? Confused.
How to change DNS Server to Cloudflare is explained in detail here:
How To Change DNS To 1.1.1.1 [ CloudFlare ] In Windows 10 Laptop And PC Full Tutorial - TECHWIBE
Are you having a slow Internet speed and websites are taking too long to load with your Window 10 OS (laptop or PC). Then this guide will definitely help you
www.techwibe.com
I downloaded an application( Cloudflare WARP) form the cloudflare website linked below. I checked the website you linked and changed the DNS accordingly, but I still can't access internet. My android phone is not even connecting without static ip and I am tired of manually setting it and not being able to use internet.
Windows · Cloudflare WARP client docs
The Cloudflare WARP client allows individuals or organizations to have a faster, more secure and private experience online.
developers.cloudflare.com
No further ideas on my part.
jwoegerbauer said:
No further ideas on my part.
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Well thanks for your help jwoegerbauer. Below is the screenshot of ipconfig command after flushing dns. It looks like I haven't been assigned an ip address, the subnet is different, and the gateway is blank. Do you have any idea what this means? What could be a valid ip adress to connect manually with static ip?
This started a couple of days ago, and I have now mitigated it with a couple of firewall rules on the VPN gateway, as well as shutting down the dhcpcd server on that server (which I don't need anyway, and which probably should have been stopped long ago).
My LAN has a raspberry pi 4 running their debian firmware that is configured as a VPN gateway. It connects my LAN via ProtonVPN to the internet. This gateway is set up with a static IP address (192.168.2.49) on the LAN, and is configured to use another RPI on my LAN to get its DNS (192.168.2.50).
My one month old running OOS 11 OnePlus8 is rooted with magisk, and I have blocked most of the google stuff from the internet using afwall, and suspended non-essential system services using greenify. When connected to my LAN, the phone has a static IP address (192.168.2.71), has its gateway set to the VPN gateway (192.168.2.49), and its DNS to my local rpi DNS (192.168.2.50).
DHCP on my LAN is provided by my router (192.168.2.1).
WIFI on my LAN is provided by an enterprise-grade tp-link hotspot.
Starting a few days ago, for reasons mysterious, when the phone connects to the LAN, the VPN gateway would promptly go offline. Because I run it headless, I would be forced to reboot it - which made diagnosis a bit of a pain. Finally, I found a log entry on the VPN gateway that informed me that my OnePlus was trying to claim the ip address of the VPN gateway as its own (192.168.2.49) in spite of being set to use 192.168.2.71. This duplicate IP was causing dhcpcd on the VPN gateway to immediately take down its eth0 interface. This would break ALL connectivity because I have wifi on that RPI disabled.
Prior to this problem involving the OnePlus, that RPI had been up continuously for over 400 days, so it should certainly be considered to be reliable at the job it does and almost certainly the problem is with the OnePlus.
So, for some reason the OnePlus is trying to assert its assigned gateway address as its IP rather than the 192.168.2.71 that is set, at least in some packet that it uses to announce itself; once it is connected it works properly (which means the right IP address is being used).
I have deleted, then re-created the wifi connection profile and doing that did not cause the problem to go away.
I have another RPI VPN gateway on my IOT VLAN (192.168.24.0/24). No DHCP is available on the VLAN (a security measure), and I do have a profile for the phone that allows it to connect to the VLAN. It works without issue there, but then dhcpcd has been and remains shut down on that RPI. I suppose I could start dhcpcd on that server and see if the phone then breaks it too. I won't do this unless there is some merit to doing so...if it would help find the basic problem.
As I say, shutting down dhcpcd and blocking all dhcp traffic to/from the LAN VPN gateway mitigated the problem. But that the problem could occur at all says something is wrong, and I'm pretty sure it isn't a problem on my network.
This seems most likely to be a bug in OnePlus firmware, though why it would manifest after a month is a mystery to me. Does anyone have any insight? Or does anyone have any suggestions for another place on XDA where this post might more appropriately be placed?
I was pretty sure no one would have any idea about this. I have mitigated it by turning off dhcpcd on the VPN gateway and I am not inclined to do a deeper dive; I have too much else to do.
How can I assign a static IP address to my phones hotspot?
I use the hotspot on my Samsung M31 to connect my laptop running Windows 10 to the internet.
I also have Oracle's Virtual Box VM running a few test websites on the laptop on Ubuntu Server 22.04, which need a static IP address to access.
A few days back when I ran ipconfig at the Windows command prompt, it showed my wireless IP address as 192.168.166.135. Today, it show as 192.168.35.125. Meaning, all my sites are now broken. Is there a way to stop the hotspot from changing IP addresses?
Can someone please help?
Thanks,
normanscr said:
How can I assign a static IP address to my phones hotspot?
I use the hotspot on my Samsung M31 to connect my laptop running Windows 10 to the internet.
I also have Oracle's Virtual Box VM running a few test websites on the laptop on Ubuntu Server 22.04, which need a static IP address to access.
A few days back when I ran ipconfig at the Windows command prompt, it showed my wireless IP address as 192.168.166.135. Today, it show as 192.168.35.125. Meaning, all my sites are now broken. Is there a way to stop the hotspot from changing IP addresses?
Can someone please help?
Thanks,
Click to expand...
Click to collapse
I don't know the answer to your question directly as your situation is more complicated than is mine but I will try to help in so much as you can at least check what your current settings are.
My setup is only similar to yours in that I have apps (such as vysor & scrcpy) on Windows which are expecting a static IP address from my phone. However, where my setup differs from yours is I'm not using my phone as a hotspot - the router is assigning the IP addresses.
However, maybe what I've learned by randomizing my MAC address on each connection can help you - where I say maybe - as I your situation is using the phone as a hotspot and mine is passively accepting the IP address handed to the phone by the router.
In Android 11, the phone's Wi-Fi radio MAC address can be randomized per SSID, in which case the "address reservation" feature of most routers (often incorrectly called "static" IP addresses) won't work as intended. Worse, in Android 12, in Developer options, you can set a switch to randomize the Wi-Fi radio MAC address of the phone on every connection, regardless of the SSID.
Hence, you have to set the "static" IP address request in the phone itself, so that the router will respect that request for a static IP address.
(As an extra complexity, my SSID broadcast is hidden for privacy reasons (not for security - but privacy), which complicates things only a tiny bit as you have to turn off auto-reconnect for privacy.)
See the images below where maybe (but maybe not!) this information will help you track down why in your (hotspot) case, this static IP address requrest isn't being honored in your hotstpot setup.
normanscr said:
How can I assign a static IP address to my phones hotspot?
I use the hotspot on my Samsung M31 to connect my laptop running Windows 10 to the internet.
I also have Oracle's Virtual Box VM running a few test websites on the laptop on Ubuntu Server 22.04, which need a static IP address to access.
A few days back when I ran ipconfig at the Windows command prompt, it showed my wireless IP address as 192.168.166.135. Today, it show as 192.168.35.125. Meaning, all my sites are now broken. Is there a way to stop the hotspot from changing IP addresses?
Can someone please help?
Thanks,
Click to expand...
Click to collapse
Hi ,
if You are the lucky owner of a rooted phone you can try this:
How do I assign a permanent static IP address to hotspot in Android 10
I would like to assign a permanent static IP address to hotspot in Android 10 (Unofficial LineageOS 17.1 for Natrium by LuK1337, rooted with Magisk v20.3 and updated to Jan 11, 2020 build). Now whenever I turn on the hotspot, it assigns a...
forum.xda-developers.com
To assign a static IP address to your phone's hotspot:
Go to your phone's settings and find the hotspot or tethering settings.
Look for the option to set the IP address as "Static" or "Manual."
Enter the desired IP address, subnet mask, gateway, and DNS server information.
Save the settings and restart the hotspot.
For more details, you can check out https://1921681.mobi/192-168-100-1/. Hope this helps.