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User Help

Wifi connected but no internet access

I’m using Xubuntu 18.04 and Windows 10, both on dedicated hard drives, but on the same laptop. I’m having problems connecting to my local WiFi network when using Linux. The situation is illustrated on this image Situation in local wifi network The trouble appears only when trying to connect to the extended network, which runs […]

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Linux Mastering Development Ubuntu

Share multiple IPsec VPN routes on local network

I have a VPN connection that provides a list of private subnets, I would like to share some of them on my local network. I have tried different IPTABLES rules with ipv4 forwarding enabled but I can’t get it. I enclose the information of the interfaces and routes once established: LAN enp3s0 and tap0 VPN […]

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Linux Mastering Development Ubuntu

Multiple NIC Configuration Stopped Working ( Multiple NIC on Same Subnet) Routing Issues

Server : Ubuntu Server 18.04.4 Router : pfSense 2.4.4 Switch : tp-link TL-SG1016DE The Short : How do I configure multiple NIC on the same subnet/VLAN? Would like traffic that goes in one NIC to go out the same interface. This was working not sure what happened. The Long: Not sure what happened but my […]

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User Help

CentOS not finding wifi adapter

I installed CentOS on a Lenovo yoga laptop a few days ago, but I cannot get the wifi to work. I’ve tried lots of things following suggestions from replies to several questions on different sites. NetworkManager-wifi is installed (and always was). Below are some of the commands people usually ask for, I really don’t know […]

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Linux Mastering Development Ubuntu

19.10 Ubuntu “Temporary failure in name resolution” Suddenly!

An Ubuntu 19.10 machine has been experiencing sudden loss of network connectivity. It is on the same network as several Windows and Mac systems which never experience these network problems. When the Ubuntu system experience this problem, running ping google.com will give the error message: Temporary failure in name resolution Tried running sudo dhclient to […]

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Mastering Development System & Network

Random “Connection resets by peer” with redis-benchmark

I’ve got several linux hosts in office network. When I run Redis server on one of them, redis clients receive random errors “Connection reset by peer”. We’ve noticed these errors with our own clients using hiredis. However, the same error is reproduced with the utility redis-benchmark included in the Redis package. This utility simulates several […]

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Linux Mastering Development Ubuntu

Ubuntu 18.04 Ethernet is recognized and connected but internet is not working

Wifi works but the Ethernet wired connection does not. The same cable on the same computer on the same Ethernet port works perfectly under windows 10. In Xubuntu 18.04 I get no internet. The system recognizes the Ethernet cable as soon as I plug it. And the network manager shows that the computer is connected […]

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Linux Mastering Development Ubuntu

Ubuntu 18.04 Ethernet is recognized and connected but internet is not working

Wifi works but the Ethernet wired connection does not. The same cable on the same computer on the same Ethernet port works perfectly under windows 10. In Xubuntu 18.04 I get no internet. The system recognizes the Ethernet cable as soon as I plug it. And the network manager shows that the computer is connected […]

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Linux Mastering Development Ubuntu

Wifi issues with Ubuntu 18.04

I’m running Ubuntu 18.04 on a Lenovo laptop, and I’m having lots of issues with my wifi. Originally, I installed Wicd, that made the connection better, but caused issues by making my wpa_supplicant fail. Now I’m back on network manager, and when I boot up, I instantaneously get good internet speeds, but then it’s almost […]

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Mastering Development System & Network

VirtualBox Ubuntu VM (Windows host) stops resolving names after connecting to VPN on host

I am running a Lubuntu guest VM on my Windows 10 host using VirtualBox (6.0.10r132072). Everything works fine network wise. When I connect to my company VPN, in most cases the VM loses ability to resolve names. In Firefox it doesn’t open any sites (e.g. github.com: Hmm. We’re having trouble finding that site. We can’t […]