Questions tagged [networkmanager]

NetworkManager is a daemon, accessible via dbus, that provides high-level interface management. There are a number of ways for end users to access it: the command line `nmcli` program, the text-based-UI `nmtui` program, and the Gnome `nm-applet` program, among others.

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NetworkManager ignores ipv6.addr-gen-mode changes on CentOS

Problem On a CentOS Linux (7/8) box with IPv6 and EUI-64 generation mode configured, NetworkManager says that the address generation mode is stable-privacy. Details and research On our CentOS Linux ...
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Resource limit reached with 503 error

I received the following error on my website 503 Error litespeed log : -- Failed to start one instance. pid: -62 Resource limit reached! -- The server specifications are as follows cloudlinux LVE ...
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Ubuntu 20.04 forward traffic between two interfaces (wlan0 and eth0) using NetworkManager

Running Ubuntu 20.04 on a Pi with netplan disabled and using NetworkManager only. Have wlan0 running in AP mode and an ethernet cable connected to the Pi. I want connections made to the wifi AP on ...
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Hyper-V Ubuntu-Server VM not connecting to Unifi USG

I have a network set up with 2 VLANs, one for personal interconnectivity and internet access for personal devices, and another one for non-trusted devices like IOT devices. Here's the network topology:...
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Network Manager openvpn only resolves once after ssh connection

I have configured an OpenVpn in Network Manager with its own DNS Server and search domain and Routes. ~$ systemd-resolve --status tun0 Link 16 (tun0) Current Scopes: DNS LLMNR setting: ...
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117 views

different DHCP behavior between machines using NetworkManager and not using NetworkManager

can anyone please shed some light on the differences I list below. And maybe explain why NetworkManager does it differently. And please advise if we can change NetworkManager to behave more like the ...
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118 views

NetworkManager isn't starting dnsmasq on restart, only reload

I've configured NetworkManager on CentOS 7.9 running in Azure to use dnsmasq. Everything is working pretty much fine, except when the server is rebooted (or NetworkManager is restarted) dnsmasq doesn'...
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Cannot access to website after installing cockpit

I have no idea what happened in my system. I have installed cockpit then I realize I cannot access to my website, which is hosted in my server, anymore. Even when I remove cockpit, which contains ...
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75 views

How to encode Pre-Shared Key (PSK) of and L2TP IPSEC connection managed by Network-Manager

If I create a VPN L2TP IPSEC connection using Network-Manager GUI, I introduce the PSK, but this one looks different on /etc/NetworkManager/system-connection/myvpn.nmconnection I am thinking the PSK ...
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72 views

nmcli connection import type wireguard writes additional default route - How to avoid it?

At start I have: [root@client ~]# ip ro | grep default default via 10.0.2.2 dev eth0 proto dhcp metric 100 When i say nmcli connection import type wireguard file /etc/wireguard/wg0.conf I get [root@...
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Ubuntu Server 20.04 network-manager not starting VPN automatically

I am getting desperate here. I need to connect a Ubuntu Server Machine on a VPS to a network to monitor several machines. I can only connect to the network with L2TP over IPsec. I have tried ...
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How to prevent Network Manager from creating routes in default routing table when interface comes up?

We are using Centos8 servers for our Nomad clients, and want to use multiple interfaces in different networks to start the containers in different firewall zones. These zones have different default ...
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OpenVPN configuration works under CLI but not on NetworkManager (TLS handshake failed)

sudo openvpn --config [VPN-NAME].ovpn: works NetworkManager configuration: doesn't work (while being the same, copypasted config) [VPN-NAME].ovpn: dev tun persist-tun persist-key ncp-disable cipher ...
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When setting up openvpn in NetworkManager GUI (KDE Plasma applet) how to make it respect the .conf/.ovpn file configuration?

I have my .conf files for openvpn working fine in an Arch with KDE Plasma. My conf files have some lines to update the DNS configurations like below: script-security 2 up /etc/openvpn/update-resolv-...
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Ubuntu 20.04 Networkmanager OpenVPN: accept pushed DNS but don't route all traffic to tun interface

I am trying to get some Ubuntu 20.04 clients at work to connect to a new OpenVPN server provided by our new server provider. The goal is to route only certain traffic into the tunnel (the ...
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How to find the route that has internet connection and set it as default (lowest metric) with NetworkManager (Ubuntu)

~$ route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 192.168.30.102 0.0.0.0 UG 100 0 0 eth0 default ...
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Values from DHCPV6C_OPTIONS not passing to dhclient

I am having trouble with getting an ipv6 address from my dhcp server. We setup a pool of instant clones. On the parent VM, we setup dhcp=dhclient on NetworkManager.conf. Then I configured /etc/...
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65 views

2 servers show different behavior when DHCP sever goes down

i dont have any control of the DHCP servers on my network and every 2 weeks or so there is an outage of a few hours where my CentOS 7.8 servers do not get responses to DHCP renewal requests. As far as ...
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NetworkManager fails to bring bridge on boot

On a newly installed Debian 10.6 I added a bridge with one slave: $ nmcli c show br0 connection.id: br0 connection.uuid: 0de37d79-84b5-4715-a5c2-...
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Linux router over VPN

I have a Linux (Ubuntu 18.04) device with 4 Ethernet ports and a LTE wwan card that I want to turn into a bridge and router. However, I don't want to enable NAT via the LTE connection, but route all ...
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28 views

No access to .x.x IP range on network

I have following setup: Cellular network connection for Internet access 2 x Ethetnet LANs with no access The LANs are 10.5x.x.x networks. My device is on 10.51.85.x subrange. I can ping / reach ...
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612 views

NetworkManager bridge is not working

I face the same problem on 2 difference machines: A CentOS 8.1 and an openSUSE Leap 15.2 I want to create a bridge on each host that will be used from libvirtfor bridged networking. On both servers, I ...
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158 views

CentOS 8 NetworkManager puts ethernet NIC to sleep

I'm running CentOS 8.2 with a pretty generic install. The system has a single Gb ethernet nic (ens32) which has a static IP address configured. Once a day (or there abouts) the ens32 interface is ...
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Unable to set outgoing IP on multi-IP CentOS 8

Our CentOS 8 server at Hetzner has a primary IP aquired through DHCP, and an additional /29 subnet. No matter what outgoing IP I choose, packets are always sent with the primary IP. I would like to ...
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174 views

Adding multiple IPs on same physical interface - but with different logical interfaces (CentOS 8 + NetworkManager)

I'm adding a secondary IP to my CentOS 8 server running NetworkManager. I would previously have done this with ifcfg-style configuration files, but I'm trying to embrace the future and the direction ...
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How do I create a CentOS 8 bridge with DHCP fallback to static address?

I have a host which I connect to different networks. On the host I have some virtual machines, and in order to enable them to connected to the network I have set up a bridge. When I connect the host ...
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444 views

NetworkManager adding extra default gateway

Using NetworkManager, I am trying to setup multiple interfaces on different VLANs; the primary interface, em1, is used on a development VLAN; the secondary interface is on a dedicated iSCSI VLAN. I am ...
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986 views

Removing all domains from NetworkManager DNS Search List

I'm trying to remove all values from the domain search list thats generated by network manager. However I cannot get it to provide a blank list. I have tried using "ignore-auto-dns but the ...
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390 views

Get uuid of connection after adding it using nmcli

I would like to add VPN connections to multiple machines and let them activate automatically when when using the default ethernet connection. However I need the UUID of the VPN connection I just added ...
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2k views

NetworkManager stop working in Ubuntu Linux

Settings - Network: Oops something has gone wrong. Please contact your software vendor. NetworkManager needs to be running. ~$ NetworkManager NetworkManager: symbol lookup error: /usr/lib/x86_64-...
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How to increase wifi beacon timeout in Linux NetworkManager?

I use ESP8266 in AP mode and connect to it using HTTPS. Unfortunately the device is not very powerful and TLS part makes it so busy that it doesn't transmit wifi beacons for a short time (as far as I ...
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Can NetworkManager deactivate connection when all bond slaves lost carrier?

For Ethernet connection, when carrier is lost then NetworkManager sets connection state to 'unavailable': [root@host ~]# ip link set down enp2s0f0 [root@host ~]# journalctl -u NetworkManager --since ...
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Centos7 / NetworkManager - how to reload route files?

How can I reload the running NetworkManager routing configuration from the route-XXX files in a Centos/RHEL7 server? I have a few servers which get routes updated directly via the /etc/sysconfig/...
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153 views

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, ...
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131 views

CentOS7 issue with NetworkManager - interface configured as static (manual) but interacts with DHCP

I have an issue with NetworkManager on CentOS7( I know, but i have to use it, because of REASONS :( ). I have a network interface of a VM configured with static IP. which worked for some time now. ...
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72 views

Can a Linux box be configured with IEEE 802.1x while grabbing the info from a Windows box?

A managed Windows device can join the wired network of my corporate company, while a personal Linux one can't. As far as I understand, this is possible thanks to IEEE 802.1x standard. Looking at the ...
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257 views

Interface bonding on GRE tunnel with nmcli

I have two Ubuntu server-based routers and I'd like to bond (in broadcast mode, since I only care about redundancy) a radio link (where the radio equipment is connected to an Ethernet port) and a LTE ...
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831 views

networkmanager-strongswan vpn - routing specific ip through VPN

I'm trying to setting a VPN on Linux Mint 19.2. I'm using the network-manager-strongswan so I added this file named VPN under /etc/NetworkManager/system-connections/ [connection] id=VPN uuid=...
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212 views

What Does This L2TP/IPSec Error Mean?

I am trying to connect to a Cisco Meraki VPN that uses L2TP/IPsec. On my side I am using Libreswan/NetworkManager to configure my connection. When I try to connect, I get logs as follows: Mar 02 11:...
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Attach KVM VM to vlan-filter capable bridge

I am trying to use new vlan-filter capable bridge on Virtualization Host running OEL 8.1. It does not support OpenVSwitch out of the box and I think vlan-aware bridge might work. Now I have (...
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83 views

Missing period in DHCP domain search

On my server running the ISC DHCP daemon, I have the following in /etc/dhcpd.conf: ... option domain-name "example.com"; option domain-search "example.com"; ... On my clients running the latest ...
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What is the proper way to setup Open vSwitch with NetworkManager in CentOS 8?

How it was before in good old times of network-scripts: I've describing bridge and port in files: /etc/sysconfig/network-scripts/ifcfg-br0 /etc/sysconfig/network-scripts/ifcfg-port0 than restart ...
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550 views

Removing config defaults for a slave interface of a bridge

I am running Fedora 31 and am having trouble with NetworkManager. I tried to make a bond of two ethernet interfaces and then put the bond in a bridge, yet the bond is getting an IPv4 address with DHCP ...
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604 views

Can't ping bridge interface br0 on Ubuntu 18 Server

I am running Ubuntu 18.04.3 Server on VirtualBox (host - Windows 10) with bridged adapter (to connect VM and my host). Host connected to switch by Ethernet. I have this yaml in /etc/netplan: network: ...
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How to recover a network device that disappeared in CentOS 7?

I have a set of servers installed in remote locations, with two ports, one that communicates with the internet, and the other that is typically set as a static IP for local connections. Recently, it ...
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KVM guests don't show correct source IP

I've got KVM hosted on CentOS 7. All of my networking configurations are done via NetworkManager. The problem I'm facing is that guests show KVM's IP, rather than my external IP, when connecting to ...
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1k views

NetworkManager gsm connection on Simcom SIM5320A via serial port is failing

Device Hardware: Raspberry Pi 3 OS: Raspbian GNU/Linux 10 (buster) NetworkManager: 1.14.6 ModemManager: 1.10.0 Modem: Simcom SIM5320A connected via UART to the port ttyAMA0 Problem I don't think ...
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No network connectivity to/from Docker CE container on CentOS 8

I just installed the latest release of docker-ce on CentOS, but I can't reach published ports from a neighboring server and can't reach the outside from the container itself. Running a plain vanilla ...
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Connect Ubuntu 19.04 Server to Ubiquity Unifi USG L2TP VPN Server?

I am trying to connect a remote Ubuntu Server 19.04 instance to a Ubiquity Unifi USG L2TP VPN Server. I have the VPN server set up as an L2TP server with PSK and verified that it is working by ...
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1k views

Policy-based routing - neither rules nor routes get picked-up by CentOS 7.6.1810

I have 2 VLANs over a bonded connection I can't get to work with policy-based-routing. Actually I can make them work manually, but I'm unable to persist the configuration in order to survive reboots. ...