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I have a very strange problem, which I must say, I haven't faced before.

Recently I upgraded my system from 16.04 to 18.04 in my HP laptop. I generally access internet via wireless connection. Most of the time I share my mobile internet connection with my laptop by creating a mobile-hotspot. As you know it is also possible to share the connection via USB tethering. In 16.04 I did not have any problem. In fact, I upgraded to 18.04 by sharing my mobile internet with my laptop via mobile-hotspot.

But after upgrading to 18.04, what I find is that Firefox cannot connect to the internet via the mobile-hotspot created by mobile. Surprisingly, Firefox works while I am sharing my mobile internet via USB tethering and also other available wireless connection. My laptop shows that it is connected to the mobile-hotspot. In connection information I get some automatic IP and DNS addresses. I can ping to those automatic IP and DNS addresses. But still Firefox or other browser (I have Chromium) won't connect to the internet when I use my mobile-hotspot.

Any idea to solve it?

Output of ifconfig:

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 1821  bytes 145195 (145.1 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1821  bytes 145195 (145.1 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlo1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.43.83  netmask 255.255.255.0  broadcast 192.168.43.255
        inet6 fe80::97a1:23f9:42a6:52a1  prefixlen 64  scopeid 0x20<link>
        ether 30:e3:7a:ce:28:ef  txqueuelen 1000  (Ethernet)
        RX packets 11445  bytes 10243390 (10.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 9937  bytes 1278923 (1.2 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

I have some doubt. I use two different wireless connection in my laptop. For office/home wireless I use static ip with netmask 255.255.255.0. For mobile-hotspot I use automatic DHCP and nothing is set by hand. Why the netmask is same ? Sorry, it may be a dumb question.

  • Welcome to Askubuntu! Is this a hotspot you created in Ubuntu via tethering to your phone? Sorry, I'm unclear on what you are saying. Please edit your post to provide clarity. Thank you for helping us help you! – Elder Geek Oct 3 '18 at 19:08
  • Dear @Elder Geek, I have edited my post as you suggested. I hope, this time it is more clear. Thank you in advance. – sandy Oct 4 '18 at 5:25
  • Please edit your post to include the output of netstat -ie or ifconfig when your laptop "shows that it is connected to the mobile-hotspot." Thank you for helping us help you! – Elder Geek Oct 4 '18 at 12:33
  • @Elder Geek : I have added the output. Please take a look. Thank you a lot for trying to help me. – sandy Oct 4 '18 at 14:46
  • I'm always willing to try. Please also edit the output of ip r into your post when your laptop "shows that it is connected to the mobile-hotspot." Thank you for helping us help you! – Elder Geek Oct 4 '18 at 21:23

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