resetting-fedora-network

resetting linux network config on fedora

tags: learning networking linux

content

what to reset:

• firewall, dns, network interface

services:

• NetworkManager, firewalld
• systemd-resolved is suggested but not found on my machine?

stop services:

• sudo systemctl stop NetworkManager
• sudo systemctl stop firewalld

remove configs:

• sudo rm -rf /etc/NetworkManager/system-connections/*
• sudo rm -rf /etc/NetworkManager/dispatcher.d/*
• backup original config: sudo mv /etc/NetworkManager/NetworkManager.conf /etc/NetworkManager/NetworkManager.conf.backup (resets to defualt)
• sudo firewall-cmd --complete-reload
• sudo firewall-cmd --set-default-zone=public or remove all firewalld config:

sudo rm -rf /etc/firewalld/zones/*
sudo rm -rf /etc/firewalld/services/*
sudo systemctl restart firewalld

dns:

• sudo rm /etc/resolv.conf what /etc/resolv.conf supposed to look like:

# Generated by NetworkManager
search illumina.com edgeos.illumina.com
nameserver 10.10.1.10
nameserver 10.10.48.5

or

nameserver 8.8.8.8

routing table

• ip link show to check interface
• sudo ip link set $interface down to disconnect an interface (disable the interface)
• sudo ip addr flush dev $interface to remove the ip addresses assigned to that interface

restart all services

sudo systemctl start NetworkManager
sudo systemctl start firewalld
sudo systemctl start systemd-resolved

check interfaces’ connection

nmcli device status

bring up disconnected interface

• sudo ip link set enp88s0 up (this might not work)
• sudo nmcli device connect enp88s0

up

down

networkmanager-dns

reference