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Linux Mastering Development Ubuntu

Help with adding second ip to second interface

I spent all day searching online and I cannot find solution for what I’m trying to do. Basically I have ESXi Ubuntu VM on OVH and block of IPs. Currently I have 1 IP configured and have web server and its using port 80 and 443 for SSL. Since I need also port 443 for […]

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Linux Mastering Development

Multiple links between bridges on different VLANs and STP

I’ve got two bridges with two pairs of virtual ethernet devices joining them to different VLANs. The setup looks something like this: Or in text form: $ brctl show bridge name bridge id STP enabled interfaces eth0_bridge 8000.d425ccb390e1 yes eth0 ve_eth0_lan1 ve_eth0_lan1_10 lan_1_bridge 8000.d425ccb390ff yes ve_lan1_eth0 eth1 ve_lan1_eth0_10 $ bridge vlan port vlan ids eth0 […]

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Linux Mastering Development

Multiple links between bridges on different VLANs and STP

I’ve got two bridges with two pairs of virtual ethernet devices joining them to different VLANs. The setup looks something like this: Or in text form: $ brctl show bridge name bridge id STP enabled interfaces eth0_bridge 8000.d425ccb390e1 yes eth0 ve_eth0_lan1 ve_eth0_lan1_10 lan_1_bridge 8000.d425ccb390ff yes ve_lan1_eth0 eth1 ve_lan1_eth0_10 $ bridge vlan port vlan ids eth0 […]

Categories
Linux Mastering Development

Multiple links between bridges on different VLANs and STP

I’ve got two bridges with two pairs of virtual ethernet devices joining them to different VLANs. The setup looks something like this: Or in text form: $ brctl show bridge name bridge id STP enabled interfaces eth0_bridge 8000.d425ccb390e1 yes eth0 ve_eth0_lan1 ve_eth0_lan1_10 lan_1_bridge 8000.d425ccb390ff yes ve_lan1_eth0 eth1 ve_lan1_eth0_10 $ bridge vlan port vlan ids eth0 […]

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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

How-to stop NetworkManager requesting a DHCP lease when configured manually?

I run networkmanager together with cockpit on Debian Buster. I have one physical interface and three VLANs on top of it. All of them are configured to have static IPs (ipv4.method: manual). However, on top of the configured static IP (without gateway I must say), the interface ALWAYS receives an additional IP via DHCP. How […]

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Linux Mastering Development

Why is my computer able to see my wifi network, but not able to connect to it?

I just installed arch linux onto my hp stream, and then installed the wifi driver for it. Now my computer is able to see other networks, but it cannot connect to them. When I ran sudo wifi-menu and typed in the password for my network, it gave the following output: Job for netctl@wlp2s0\x2d[my home wifi […]

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Linux Mastering Development Ubuntu

Adding Multiple IP Addresses from 2 different Subnets to my interface

I’m trying to setup squid with my Ubuntu 16.04 server. I configured everything with my first subnet (which shares the gateway with my server IP). My provider has added 2 different networks to my server tho, and I’m unable to add the second half to my interface. For clarity purposes I will use fake IP’s […]

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Linux Mastering Development Ubuntu

Ubuntu 16.04 DNS resolving is broken

I have a post going on Ubuntu Forums about this issue but the it has stalled and the issue isn’t resolved so I’m trying to tap in to the ask community for help. I had a perfectly working 16.04 dual boot install. Needing to use some Windows software for work I replaced a long unused […]

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Linux Mastering Development Ubuntu

VPN connected and passing DPD keep-alive but no other traffic

I have a connection to my work VPN up using Shrewsoft VPN client (IPSec, IKEv1). It’s connected and I can see NATT keepalive and DPD keepalive traffic going over, but I have no network connectivity at all. Here is a sample of tcpdump output from my wifi adapter (“gateway” is the VPN gateway): 22:15:52.830866 IP […]