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Mastering Development

MetalLB install & Configuration on Kubernetes

I install and configured MetalLB on My Kubernetes cluster. Then try to create LoadBalancer Type service. ( NodePort type service is working well. ) But, EXTERNAL-IP is pending status. I got below error on MetalLB controller pod. Somebody can help to resolve this issues. I also have simular issue when I try to install nginx […]

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User Help

Why can I not communicate through VPC peering connection to VPC in another account?

I have two amazon AWS accounts, a paid one that hosts public webservers (called "paid" below), and a free tier account (called "free" below). Each has a couple of EC2 instances running Amazon Linux in its own VPC, each with a single subnet with no overlap between them. I wanted to be able to transfer […]

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User Help

static network connection between two debians

I am having a big trouble in setting a simple static connection between two computers (two Debians, say A and B). I know, in principle, how to do it, and have done properly for computers B and C (all Debians). However, configuring A is the main goal. Whenever I connect A to my home router […]

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Mastering Development System & Network

Where are nmcli capitalized setting stored and how can I modify them?

I have a VM and I’m playing with nmcli on CentOS 8 nmcli shows a couple addresses which I added. I was able to remove the .106 address from the ipv4.addresses, but not from the capitalized configuration (I don’t know what the capitalized component config is called). $ nmcli connection show enp0s8 … ipv4.addresses: 192.168.56.107/24 […]

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Mastering Development System & Network

docker swarm container bind address other than 0.0.0.0

I got a multi-node docker swarm setup with the following interfaces: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group […]

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User Help

Freshly installed Manjaro linux doesn’t show up wifi

I just installed Manjaro on my dell latitude 7389. Wifi worked just fine right after I installed. but after I did a full upgrade with "pacman -Syu" wifi stopped working. ethernet and bluetooth both works just fine tho. I even tried downgrading the kernel to 5.4 from 5.9. But it still doesn’t work. when I […]

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Mastering Development System & Network

VRF route leaking. Packets not returned

I have following network setup: Firewall connects public network(internet) with private network. Access to public/private networks is set up via VRFs. Here is output of ip link: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: lan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9216 qdisc fq_codel state UP […]

Categories
Mastering Development System & Network

VRF route leaking. Packets not returned

I have following network setup: Firewall connects public network(internet) with private network. Access to public/private networks is set up via VRFs. Here is output of ip link: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: lan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9216 qdisc fq_codel state UP […]

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Linux Mastering Development

Forwarding ports through OpenVPN server to local server (Ubuntu 20.04 x64)

The Goal Hello, I have run into quite a wall when it comes to figuring out my issue of forwarding ports through my remote VPS to my local home server. What I am trying to do is host a Counter Strike GO server for my buddies and I but have everyone (including myself) connect via […]

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Mastering Development System & Network

Openstack instance lost internet access after ataching floating ip

Maybe someone has same problem I have installed Openstack Victoria on two virtualmachines (1 controller node, 1 compute node) running ubuntu 20.04. Each node has two network interfaces, mgmt network and provider network. I have created private network and I have attached it to router. With this configuration I am able to access internet. But, […]