I run Testing on two laptops; let's call them Lap1 and Lap2. Lap1's wireless device is 07:00.0 Network controller: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n (rev 01), while Lap2's is 02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59). I have two available networks at home, one I pay for and another one provided by my employer; let's call them Home and Work respectively.
Connected to any network, Lap1 can browse, ping, and traceroute without any trouble. The same if I connect Lap2 to Work.
When Lap2 is connected to Home I can't browse the internet. Immediately after establishing the connection I can browse the internet, but after around 15 seconds every request hangs. The same happens if I connect Lap2 to Home using an Ethernet cable. The specifics are as follows:
- I can ping any website, but running traceroute always returns three columns of asterisks regardless of the address I give as a parameter.
- I can ping 192.168.100.1, which is the router/switch address, both with and without the -b flag.
- I cannot ping any other address in the local network, i.e. 192.168.100.x, for x not equal to 1; I always get "Destination Host Unreachable".
- When I enter 192.168.100.1 in a browser, I get the Apache2 Debian default page, whose "hard file" is /var/www/html/index.html; from any other device, this address takes me to the configuration site for the router.
- When I access this config. site, I can see that Lap2 has always a status of "Offline", regardless of whether it is connected or not to Home.
- I posted this problem at a Debian users group on Facebook and I was adviced to flush routing tables using these instructions: https://linoxide.com/how-to-flush-routi ... rom-cache/.
- Deleting every file in /etc/NetworkManager/system-connections/, and restarted the Network Manager service.
- Running iptables -F (as root, of course) and restarting Network Manager.
- Adding Lap2's wireless MAC address to the whitelist at 192.168.100.1 from Lap1.
- If I connect to Home using USB tethering via my phone on Lap2, I can browse the internet with no problem.
- If I log out and use my guest account in Lap2, I can browse; the connection is painfully slow, but I do have internet access plus I can traceroute sites with just a few lines of asterisks, not all of them. Still, I cannot ping local network nodes (i.e. 192.168.100.x) from the guest account.
I apologise for the bad formatting, but I'm not very familiar with the markup of this forum.
EDIT: I bought a WiFi USB antenna to plug into Lap2, and connected it to Home; the same thing happens: I can establish a connection but no name gets resolved; I can ping but traceroute always returns asterisks.
Please help!