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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How to manage DNS in NetworkManager via console (nmcli)?
I have CentOS 7.2 (guest in VirtualBox, vagrant box centos/7, no GUI).
I see there is a nameserver in file:
$ cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 10.0.2.3
But how to add or ...
- 1,089
33
votes
8
answers
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NetworkManager is not changing /etc/resolv.conf after openvpn dns push
I've got a problem which is "NetworkManager is not updating /etc/resolv.conf after openvpn connection with dns push configured".
Here's my openvpn server config: (I've changed domain name to ABC.COM ...
- 435
31
votes
4
answers
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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 ...
- 1,213
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7
answers
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How do I force NetworkManager to update /etc/resolv.conf?
If I add a new DNS server using nmcli connection modify eth0 +ipv4.dns 8.8.8.8, I still have to update /etc/resolv.conf for the resolver to pick up the changes, right? So how do I force the update?
...
- 3,226
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votes
6
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"RTNETLINK answers: File exists" /etc/network/interfaces Does'nt contain 2 gateways, so what's wrong?
This is my /etc/network/interfaces file contents
The only way this is taking effect is when the system reboots.
I'm trying to get it effected manually. My attempts below.
auto eth0
iface eth0 ...
- 315
15
votes
3
answers
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What is the relation between NetworkManager and network service in Fedora/RHEL/Centos?
Hi I am new to Fedora/Centos/RHEL. I am confused about NetworkManager and network service in these Linux OS. May I know what is the relation between NetworkManager and network service?
If I am using ...
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10
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17
answers
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Inexpensive Network Monitoring tools for Windows
I'm looking for a free or inexpensive Windows-based network monitoring tool for a small network. I'm familiar with Nagios, but we run a Windows-only shop and I don't want one oddball Linux machine to ...
user640
10
votes
4
answers
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How can I set a search domain (and other resolv.conf parameters) in Ubuntu?
I like Ubuntu's NetworkManager -- it does a great job keeping track of all my WiFi parameters and passwords. However, when I actually plug in an Ethernet cable, the frustration begins.
When hooked up ...
- 4,033
10
votes
2
answers
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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 ...
- 632
9
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3
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Ubuntu resolv.conf, not going to next nameserver?
I am using Ubuntu 10.04 Desktop, which comes by default with the "Network Manager" (which I am highly suspicious of).
I am having an issue with resolving DNS zones on 2 different nameservers.
resolv....
- 1,598
9
votes
2
answers
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How do use nmcli to enable DHCP forIPv4 and IPv6 on a specific interface?
I recently switched 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 use nmcli to enable DHCP on this ...
- 8,266
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votes
2
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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 ...
- 171
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3
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Network Manager: failover between two default gateways
Is Network Manager able to check if a default gateway can route packages to the internet?
I have two interfaces, both provide a route to the internet.
When I unplug a cable from any of them, default ...
9
votes
1
answer
6k
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teaming with nmcli: bringing connection down and up again fails
On a centos 7 virtual box, I create a team like this:
nmcli connection add type team con-name team0 ifname veteam0
nmcli connection modify team0 team.config roundrobin.conf
[root@rhce1 ~]# cat ...
- 1,215
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4
answers
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NIS failing to bind
I have a bunch of machines which authenticate via NIS to a central server. I just bought a new CentOS 6.2 client machine, and it can't authenticate.
The following is a list of the classics people ...
- 471
8
votes
1
answer
2k
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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 ...
- 2,196
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votes
3
answers
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How to connect to VPN from the command line in Linux?
I have different tunnels that I configured using the network manager GUI.
When I login to my desktop, I'm connected to the internet without any tunnels. To connect to a tunnel, I usually click on the ...
- 664
7
votes
1
answer
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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 ...
- 305
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13
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Network monitoring tool for FreeBSD [closed]
I am using FreeBSD 6.1 as router.
Now I looking for Network Traffic Monitoring software to see what's happening with internet link.
I have two installed LAN cards in my system, one for lan and other ...
- 1,531
6
votes
2
answers
22k
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How do I supply a password to NetworkManager-openconnect automatically?
I am running a RedHat Enterprise Linux 7.3 server with NetworkManager 1.4 that needs periodic access over VPN to a client's network using openconnect 7.06-1.el7. I can use nmcli to connect with the --...
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4
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Where does NetworkManager store the domain name for generating resolv.conf?
I am having problems getting my domain name set correctly on CentOS 6. My resolv.conf looks like this:
nameserver 198.6.100.25
nameserver 198.6.100.53
nameserver 198.6.100.38
# Generated by ...
- 4,311
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votes
1
answer
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Bridge on vlan on teaming for KVM
I have problem to create bridge on vlan on teaming.
Why I do something like that?
- Kvm needs bridge
- Vlans because I need vm’s in different subnets
- Teaming in option active-backup (small HA)
I do ...
- 51
5
votes
2
answers
3k
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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
- 4,654
4
votes
2
answers
15k
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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 ...
- 153
4
votes
1
answer
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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=...
4
votes
2
answers
3k
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How to convert ip configuration from dhcp to static using nmcli?
is there a way to use nmcli to convert dhcp acquired IP configuration (IP,Mask,Gateway,DNS) to static configuration?
Preferable in a way that i can use in a script?
Thanks
4
votes
0
answers
1k
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nmcli static routes are ignored
I'm in doubt about how NetworkManager through nmcli manages static routes. I have a CentOS 7.1.1503 server with three network interfaces:
[root@brick ~ ]# nmcli con show
NOMBRE UUID ...
- 181
3
votes
2
answers
1k
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Find which program is replacing my resolv.conf file
I use network-manager on Debian 8. My config contains some custom DNS servers, so my /etc/resolv.conf file generated by network-manager looks like this:
# Generated by NetworkManager
search rudloff....
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3
votes
2
answers
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CentOS 6 WiFi using NetworkManager and Without GUI tools
I am using CentOS 6, trying desperately to get Wifi working via a ifcfg-wlan0 file and fudging with /etc/wpa_supplicant/wpa_supplicant.conf. I do not have an X server, so I do not want to use the GUI ...
- 1,952
3
votes
2
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How to add interface alias on RHEL6 or CentOS6 with NetworkManager?
How to add a network interface alias (for example eth0:0) on CentOS6 or RHEL6 in the "correct" way that is through NetworkManager without NM_CONTROLLED=no. And this has to be done without GUI.
Thank ...
3
votes
2
answers
1k
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bridge for virtualisation stays in state DOWN - unable to get it up
Running Rocky 9.3, attempting to get a bridge for a public Range of IPs for use with Virtual machines.
Same hardware used to run Centos 7.8 machine with it all working, am now trying to set it up the ...
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3
votes
1
answer
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Routing issue on Linux with Mobile Broadband
Note:
This is a "cross-post", I asked this same question on "superuser" StackExchange site, but without obtain any answers, just a comment (now curiously disappeared).
I've thought this site is ...
- 31
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votes
2
answers
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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 ...
- 41
3
votes
2
answers
5k
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Removing all domains from Network Manager DNS Search List
I'm trying to remove all values from the domain search list that's generated by the network manager. However I cannot get it to provide a blank list. I have tried using "ignore-auto-dns but the ...
google-cloud-platform
3
votes
0
answers
156
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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 ...
- 231
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votes
1
answer
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Ubuntu & OpenConnect : any way to provide additional arguments?
I'm using OpenConnect to connect to my workplace via VPN. This works fine, but I'd like to use Ubuntu's network manager to establish connections. I guess it's a matter of having all connections ...
- 1,630
2
votes
1
answer
5k
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openconnect VPN works in KDE NetworkManager widget but not on command line
I need to connect to a Cisco VPN on Linux and at first I did this using the KDE NetworkManager plasma widget thingy. That worked fine and I'm able to connect to the VPN if I choose it from the Network ...
- 273
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votes
2
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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 ...
- 669
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votes
2
answers
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dnsmasq reads addn-hosts config but ignores it, falls back to system's /etc/hosts
I'm running dnsmasq installed as a NetworkManager plugin on my local Fedora 39 machine.
All I need from dnsmasq is basically support for additional hosts files that I can organise by topics.
My ...
- 143
2
votes
1
answer
678
views
How to fix NetworkManager-dispatcher script permission denied error?
I've got a fully updated RockyLinux 9.2 server, where I have a couple of network services running via Systemd.
Following the instructions such as from here and here, I created a shell script that's ...
- 875
2
votes
1
answer
2k
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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 ...
- 25
2
votes
1
answer
937
views
How do I configure NetworkManger-OpenVPN to only use a VPN for some IPs?
My company is using a pfsense router to manage a simple VPN for the office. The idea is that I should be able to connect to the VPN from home and use it to (a) access servers on the office LAN and (b)...
- 675
2
votes
3
answers
13k
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dnsmasq on virbr0 (libvirt) and network manager
I want to run dnsmasq on my local machine in order to configure a wildcard to resolve to 127.0.0.1 for testing purposes.
However, when I went to start dnsmasq with systemd I got the following error ...
user315915
2
votes
2
answers
13k
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Issue with RHEL7 and disabling NetworkManager
Okay community, let's see if we can figure this one out, cause I'm out of answers.
Where I work I am setting up a bunch of RedHat Enterprise Linux servers. There is a collection of RHEL6 and RHEL7 ...
- 31
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votes
2
answers
2k
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Linux: how to verify my network configuration before doing a restart
I am trying to build a network bridge for my VMs on a server.
So I added a new file and changed another in the /etc/sysconfig/network-scripts directory.
Then I did a network reboot with the ...
- 341
2
votes
2
answers
1k
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NetworkManager applet looks like it can't see network
My system is Ubuntu 9.04.
There is NetworkManager applet, but it looks like there are no networks. When I click it, there is disabled menu "Wired Network/device not managed". I have working eth0 ...
- 757
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votes
5
answers
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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. ...
2
votes
1
answer
1k
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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 ...
- 1,748
2
votes
2
answers
2k
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nmcli is not working in Kickstart script
I have the following commands in a Kickstart post-install script:
firewall-offline-cmd --new-zone=management
firewall-offline-cmd --zone=management --add-service=ssh --add-service=snmp
firewall-...
- 974
2
votes
1
answer
693
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How to persist on a wifi network in a ubuntu machine?
I've got a Ubuntu machine running a software that requires internet. However, sometimes the wifi fails (router reboot for example) and doesn't find the network again, until I manually service network-...
