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.

Filter by
Sorted by
Tagged with
0
votes
0answers
14 views

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 ...
2
votes
0answers
14 views

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 ...
0
votes
0answers
7 views

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/...
0
votes
1answer
39 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, ...
0
votes
0answers
24 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. ...
0
votes
0answers
30 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 ...
0
votes
1answer
54 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 ...
4
votes
1answer
392 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=...
0
votes
0answers
18 views

Network Manager/Wired Connection: Why Wireless Broadcasting Every 63 Seconds?

I'm running Ubuntu 16.04 with Network Manager. I've got a wired connection which is working fine. I used an RF meter and discovered that precisely every 63 seconds, there is a massive wireless burst ...
0
votes
1answer
100 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:...
0
votes
0answers
16 views

Syslog debug help : 4G connection drop Airtel

My 4G device is on an automobile that travels around 500 kms in a night. The network disconnects sometimes. And this is the log I see in the Syslog. Can someone help me understand what is going on? ...
0
votes
0answers
212 views

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 (...
0
votes
1answer
46 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 ...
1
vote
1answer
677 views

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 ...
1
vote
1answer
82 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 ...
0
votes
1answer
248 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: ...
0
votes
0answers
220 views

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 ...
0
votes
0answers
21 views

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 ...
0
votes
2answers
466 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 ...
11
votes
3answers
8k views

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 ...
0
votes
0answers
29 views

NetworkManager basic authentication on centos7

I'm using gui vpn(cisco) on centos7 by NetworkManager package, after an OS update I faced an issue when try to connect vpn,here is log: Server 'nl.cisadd2.com' requested Basic authentication which is ...
1
vote
0answers
864 views

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 ...
1
vote
1answer
485 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. ...
0
votes
2answers
32 views

Mongodb doesn't start on reboot

Installed mongodb on Ubuntu 18.04 LTS, mongod service enabled to start automatically on boot. Configured mongodb.conf to start on 127.0.0.1 and host IP. Could start/stop service with systemctl but ...
2
votes
0answers
109 views

What is the meaning of using netplan?

I’m running a few Ubuntu servers and recently started upgrading from 16.04 to 18.04. In this context I came in contact with NetworkManager and netplan. After sticking to ifupdown first, I finally ...
2
votes
0answers
302 views

Cannot resolve some domains with dnsmasq

My machine runs ArchLinux, with NetworkManager and dnsmasq. Dnsmasq should forward all requests to Google's DNS 8.8.8.8, and therefore should simply act as a local cache in front of Google's DNS. For ...
1
vote
2answers
5k views

How do use nmcli to enable dhcp for ipv4 and ipv6 on a specific interface?

I recently switch an interface from not being managed by NetworkManager to being managed but it does not get an IP. I would like to know what is the correct way to usen nmcli to enable dhcp on this ...
1
vote
0answers
166 views

Centos 7.3x & 7.4x VM's fail to bringup login service and network manager after a yum update and restart

I'm running into an odd problem that I've never encountered before. On any of our Centos 7.3x or 7.4x after I do a yum update and restart the VM will eventually come back up, but hangs during the ...
0
votes
1answer
230 views

OpenVPN exits when network connectivity is restored

I'm using OpenVPN as a daemon and when I lose the internet connection, OpenVPN waits for 2 minutes before it tries to restart each 5 seconds. This is as I want it to behave. However when the internet ...
0
votes
1answer
139 views

How to get a nameserver IP from Linux CLI? [duplicate]

When I connect to a wireless network from my laptop, Network Manager somehow requests a DNS nameserver IP from the router and writes it to /etc/resolv.conf. How can I request a nameserver address ...
0
votes
3answers
439 views

How to configure already statically routed IPv6 block on CentOS 7

My question is very simple yet I didn't find a solution, probably because of my lack of networking knowledge. I have a dedicated server and I manipulate it through IPMI remotely. Recently I asked for ...
0
votes
0answers
19 views

Starting Linux NetworkManager caused probable disruption in network connectivity

i had a situation on my Linux machines on Production networks, where I had used a script to start the NetworkManager, because I needed to fetch some NMCLI output details, and NMCLI was not running ...
1
vote
0answers
393 views

Disabling NetworkManager, lost connectivity

I am trying to figure out why my CentOS 7 server is not able to connect to the internet after disabling NetworkManager (installation requirement by cPanel). I have followed this tutorial here on how ...
1
vote
1answer
721 views

What is the unit of Signal as output in “nmcli dev wifi”

I want to know the unit in which The Signal is calculated. Is it in dBM ? Usually I see the dBM values are in -. What would the - and + values signify in dBM ? Also more the value is positive, does it ...
0
votes
0answers
84 views

Maintaining openVPN connection on CentOS 7 Server

Morning all, I have a headless CentOS 7 server that has an openVPN tunnel to another server at a different location. I have looked around the net and found that if I place a script inside the /etc/...
0
votes
1answer
96 views

How to undo NetworkManager changes

I accidentally modified NetworkManager with the command. nmcli con modify eno1 ipv4.dns-options 'single-request-reopen timeout:2 ndots:0' I think the modification hasn't been activated since I haven'...
0
votes
2answers
446 views

Bind NetworkManager managed dnsmasq to device when it appears

I have couple of servers running in VirtualBox interconnected by hosted-only network. The parent system is Ubuntu running NetworkManager which manages the DNS according to the connected network so my ...
0
votes
4answers
1k views

How do I set the single-request option in NetworkManager?

In our environment (lots of CentOS 7 VMs), we routinely encounter the oft-discussed issue where name service lookups result in a 5 second delay as a request times out, even on "successful" requests. ...
4
votes
2answers
5k views

NetworkManager & dnsmasq - ignore auto DNS settings

I'm running Arch Linux with NetworkManager and dnsmasq set up. It all seems to work fine, except that I try to use the new CloudFlare 1.1.1.1 DNS, but the resolver keeps using the DNS that is ...
0
votes
1answer
595 views

How to route default destination not via VPN tunnel?

There a millions of sites which describe how to configure the network routing to send all traffic through the VPN tunnel. However, what is the exact opposite? There is an OpenVPN server configured on ...
0
votes
1answer
437 views

Qubes OS OpenVPN UDP works from terminal, not from NetworkManager

TCP works either way. I've fresh installed Qubes OS 3.2. I am trying to connect to NORDVPN from the sys-net. If I open a terminal and type "sudo openvpn --config us512.nordvpn.com.udp1194.ovpn" (asks ...
8
votes
1answer
437 views

Linux self recovering DHCP after really long downtime?

I have a few CentOS 6/7 systems (non-production, experimental purposes) that have been configured to use DHCP for their IP address. Last week there was a big network disruption and I found that those ...
2
votes
2answers
713 views

NetworkManager - do not allow user to disable network or connection

By default, users that are logged in on the system are able to completely disable network or connection, is there a way to disable this? Thanks
0
votes
1answer
10k views

How do I enable the wireless network adapter on centos 7 minimal install?

I have just installed CentOS 7 over an old windows PC. The CentOS 7 image was of minimal install as I had only 4 GB of pendrive available. The wifi driver named wlp18s0b1 shows in the list if I do ip ...
1
vote
0answers
231 views

Teamed port with activebackup and arp-ping link checking fails when one port dies

I have two machines which are interconnected over 2 ports and I want both ports to be teamed to have a single interconnect link. I've configured the team runner to be activebackup and the link state ...
2
votes
1answer
703 views

Avoid Replacing DHCP-discovered DNS Resolvers?

I am on CentOS 7.4 attempting to configure dnsmasq for DNS caching and per-zone DNS servers for running Consul. Essentially, the dnsmasq configuration boils down to this: # filter everything with ...
6
votes
1answer
3k views

NetworkManager does not bring up interface after reboot

I create an OVS bridge with: # ovs-vsctl add-br br-int This create a netdevice that I can see in ifconfig. And then I create a NetworkManager connection and bring it up: # nmcli connection add type ...
1
vote
0answers
296 views

Fedora 26: Docker, NetworkManager, dnsmasq startup order

I am using Docker with Consul. I have configured NetworkManager to use dnsmasq and I configured dnsmasq to listen on the Docker interface docker0. When the machine is booting, dnsmasq cannot find the ...
0
votes
1answer
309 views

Domain names not getting resolved after adding ethernet port to Open vSwitch

For a QoS experiment, I wanted to connect two VMs to Open vSwitch. I created two tap interfaces and attached the VMs to them. I added the two tap interfaces to Open vSwitch. Finally, I added the ...
0
votes
1answer
362 views

How can I have NetworkManger automatically connect to a network?

I am trying to prepare several machines that will be used at a single location. I know the SSID of the network and it will be unsecured. Is there a way to add the network in NetworkManager so that ...