All Questions
Tagged with networking dhcp
716
questions
0
votes
1
answer
69
views
Difficulty in connecting TP Link Wifi Extender with Ubuntu 24.04
I have 3 TP Link Wifi extenders (2 different models) and can not connect to any of them in Automatic mode in Ubuntu 24.04. Connecting directly to my hub works OK. Manual configuration of IP addresses ...
- 45
2
votes
1
answer
169
views
Cannot resolve own local (avahi) hostname
After swapping a faulty router, trying to ssh from PC "A" (Ubuntu 20.04.6) to PC "A", produces the error message: ssh: Could not resolve hostname pca.local: Name or service not ...
- 1,414
0
votes
1
answer
313
views
WiFi not connecting after upgrade to Ubuntu 24.04. Problem with apparmor?
After upgrading to Ubuntu 24.04 I can't make any network connections, wired or wireless with automatic DHCP enabled. If I set IP Address, Netmask and Gateway manually everything works. To get the ...
- 45
0
votes
0
answers
44
views
noble 24.04 ssh after DHCP reservation
When I installed 24.04 on my two machines (let's call them foo1 and foo2), Ubuntu settings has an ssh feature in settings|system|secure shell which would allow me to simply type ssh foo2 from foo1 to ...
- 664
0
votes
0
answers
53
views
Netplan with source-based routing for multiple NICs and Gateways
I want to configure an Ubuntu VM with multiple NICs and Gateways:
ens18: 192.168.10.0/24
ens19: 192.168.20.0/24
ens20: 192.168.30.0/24
In the best case, the IPs should be provided by my DHCP server.
...
- 1
0
votes
0
answers
21
views
Route between two network interfaces (one with VPN, the other one served DHCP addresses)
I tried to find an answer to my question, but I've not found anything...If this has been asked and answered I'll be happy with a pointer.
I have a server running Ubuntu 23.10 with two network ...
- 1
0
votes
0
answers
27
views
How can i bridge eth interfaces with no bridge (let me explain)
I have a device that has 3 ETH interfaces.
This way I installed the Ubuntu server on it to use the Pi-Hole application
I want to use my ETH0 to receive the Wan cable from my internet provider moden ...
0
votes
0
answers
16
views
Dual nic server with open client http port unreachable
I am setting up a poe switch connected to my ubuntu server 20.04. I am running an amd 5700 with some generic parts in a minipc that is being used as an nvr. I have a internet facing nic, eno1, where ...
0
votes
2
answers
834
views
failing pxeboot install for 24.04 Server LTS
I'm trying to set up a pxeboot installer for 24.04 Server LTS. The machine finds our PXE and TFTP just fine, and loads the kernel and initrd. But when it gets to the install, it fails to recognize ...
- 51
0
votes
0
answers
76
views
DHCP does not work
I'm trying to config a notebook as router, with 3 NICs, 2 used to connect to internet (with modems with DHCP servers embeded), and 1 to connect to LAN, with a switch (I want to use an ubuntu dhcp ...
- 74
2
votes
1
answer
696
views
ip-config-unavailable DHCP error from NetworkManager
Overview and Environment
I recently set up a new VirtualBox VM and ran into some strange network behavior. The machine is running Ubuntu 22.04 and after installing the virtualbox guest additions, my I ...
- 141
1
vote
0
answers
253
views
When does ubuntu initiate a DHCP lease renewal?
After doing some research. I found out that some DHCP clients initiate a lease renew when 50% of the lease time has elapsed. And I need to know if this is valid for ubuntu 20 and later DHCP clients. I ...
- 111
0
votes
0
answers
77
views
ISC-DHCP-Server Crash without any error messages
I have two server machines with ubuntu 22.04 LTS. One is the master, the secondary is standby.
Both server serve NTP service, Bind9 services and DHCP services (bind9 & DHCP additionally providing ...
- 55
0
votes
0
answers
23
views
Ubuntu 20 desktop has my external IP
I have a small factor PC connecting to LAN1 port of a router that acts as a wifi bridge to other parts of my network. The traffic eventually leaves the house from a Bell Canada router. Yesterday I ...
1
vote
0
answers
111
views
Ubuntu Server with 2 nics
I would lik to pose a question here because i'm missing something with the settings on a ubuntu server 22.04 with 2 nics. I think it should be fairly easy because with other servers (NethServer ...
- 11
0
votes
1
answer
149
views
DHCPD and Appamor
I running ubuntu 22.04 on raspberry pi, with fixed IPv4 address. On the server a isc-dhcp-server is running. (i know isc-dhcp-server is outdated an not in service anymore).
While starting appamor ...
- 55
0
votes
0
answers
75
views
Impossible to make IP static - SOLVED
I may be had an upgrade problem from Ubuntu 20.04 to 22.04 that I can't solve.
My IP was before static at 192.168.0.100 on the "ens1" interface, but the interface have been set to "...
- 1
0
votes
1
answer
108
views
netplan config is ignored, who reconfigures my network?
I have a machine with multiple NIC, for the sake of simplicity we call them
ext0: uses DHCP, goes to the outside
int0 and int1: have static IP adresses, go to some private network, where there is ...
- 978
-1
votes
1
answer
3k
views
Ubuntu DHCP client uses IDs instead of MAC addresses. Can't change this behavior
I'm trying to use DHCP static lease assignment instead of manually managing static IPs for some of our servers. However Ubuntu switched from MAC addresses to some DHCP IDs becoming useless after major ...
- 39
0
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0
answers
81
views
Unable to Configure Network on Homeserver Behind "Fritz Box" Home Router
Description:
I've encountered a puzzling network issue with my homeserver setup and I'm seeking guidance to resolve it.
Problem:
My homeserver, behind a "Fritz Box" home router, experiences ...
- 1
0
votes
0
answers
60
views
dhcpd.conf configuration for PXE server
i am trying to configure the dhcpd.conf file, when I restart and see the staus of the isc-dhcp-server it is giving below error:
isc-dhcp-server.service - ISC DHCP IPv4 server
Loaded: loaded (/lib/...
1
vote
1
answer
650
views
MacVTap in KVM not getting IP address from Local Network DHCP
Trying to create a KVM with MacVTap interface, but there is no ip assigned to it
Referring to these docs to create the kvm.
Followed the creation of network properly, i.e added interface in the ...
1
vote
0
answers
530
views
Netplan Configuration Isssue: Unable to obtain ip address for ethernet configured with dhcp4
Goal:
Determine why configuring an interface with only dhcp4 fails.
Setup
I am working on configuring netplan for a Virtualbox VM.
The VM has 1 bridged adapter connected to my machines wlo1 and 2 ...
- 141
0
votes
0
answers
298
views
No Internet after static IP Ubuntu 22.04
I have a Ubuntu 22.04 Server, and one to an other day i dosn't become from the router a dhcp adress, but when i set a static ip adress i can connect localy to the services on the server, but I can not ...
0
votes
1
answer
112
views
Making Ubuntu host allocate same DHCP IP address to same guest VM all the time
I have an Ubuntu 22.04 and I have Oracle VM VirtualBox 7.0.4 on it. I have created several VMs (all Linux VMs) on VirtualBox. I need DHCP to allocate same IP address to a particular VM. I installed ...
- 11
0
votes
0
answers
321
views
Ubuntu Server Loses Connection Every Few Hours (Systemd-Networkd restart fixes)
I am having trouble with a new install of ubuntu server. I configured a bonded network using systemd-networkd which works but every few hours it stops working.
10-bond0.netdev
[NetDev]
Name=bond0
Kind=...
- 309
0
votes
0
answers
93
views
Network Problem, when trying to connect to Eduroam Wifi
I can connect fine to any other networks.
And I can also connect to this wifi, when I am at the center of it, but it's like when I get a bit too far from its original startpoint it gives up on ...
- 1
1
vote
1
answer
3k
views
Ubuntu 20.04, Cannot ping gateway
I have a fresh install of Ubuntu 20.04. Connected to ethernet getting dhcp setting automatic from modem.
Gateway 192.168.2.1
Ubuntu 192.168.2.100
Home device 192.168.2.21
Home device is able to ...
- 11
0
votes
0
answers
24
views
Can't transport Ubuntu to another machine - fails dhcp connection
I have an application running under Ubuntu 18.04 server which I've always been able to clone and move to another machine. When I create a 20.04 drive, I can move it to another machine with the same ...
0
votes
0
answers
51
views
Copy info from DHCP to Manual settings in Network Manager?
What I want to achieve is to get all info from DHCP (DNS servers, search domains, IP) as the starting point for my manual settings.
Example: what I do right now is to set is as Automatic and then run ...
- 220
0
votes
1
answer
628
views
Ubuntu 20.04 with two NIC, but only one works
As the title says, I have a system running Ubuntu 20.04 with two NICs.One NIC (ens9) is connected to the cameras (via a switch) and the other (ens4) is connected to a LiDAR. I am running a DHCP server ...
0
votes
0
answers
335
views
Got no internet connection on my Ubuntu 23.04. Need help
My Ubuntu had internet connection previously , but once I have set up my DNS and DHCP servers, my Ubuntu has no more internet connection.
May I know what is the main cause of not having internet ...
- 61
0
votes
0
answers
115
views
ubuntu server DHCP Server two interfaces -how?
Hi I have got a problem with DHCP Server on ubuntu server witch is configured on rasbery pi. Device has two network interfaces wlan0 -where is Internet from phone and eth0. The problem is that eth0 ...
0
votes
0
answers
394
views
Specifying systemd-networkd options via netplan
I have a need to use a systemd-networkd configuration option on my system:
[DHCPV6]
RapidCommit=no
Is it possible to add this option via netplan somehow? Or do I have to disable netplan completely to ...
- 1
0
votes
1
answer
1k
views
Netplan/NetworkManager not using dhclient at boot
I would like to use dhclient as my DHCP client, and as systemd-networkd does not support this, I would like to switch to Network Manager in Ubuntu 22.04.
My Netplan configuration is as follows:
...
- 1
0
votes
1
answer
353
views
Can't find the network during installation
I'm trying to finish setting up Ubuntu 20.04 server on my HP ZBook laptop, but I can't set up the network correctly.
I can't find my wired LAN. I read the Ubuntu official guide and it says that ...
- 1
0
votes
1
answer
142
views
Having trouble deleting old DHCP configuration from interface
I switched my router and my new one is setup with different IP ranges for the dhcp clients. Old one was 192.168.0.0/24, new one 192.168.88.0/24. My ubuntu server that is in my network won't loose that ...
0
votes
2
answers
3k
views
Routing Table Metric With Two Interfaces
I've tried for many hours now to find a solution to my issue, but I can't seem to locate a permanent explanation - I'm also an ultra noob, so forgive me if I get the basics incorrect.
I have a server ...
- 13
0
votes
1
answer
2k
views
Can not connect to internet/struggling with network configuration
Trying to use Ubuntu server for a minecraft server with friends. Not had much luck. Basically when it gets to the DHCP part of the install for the network configuration, there is no IP address and the ...
- 1
0
votes
0
answers
472
views
Ubuntu 22.04 vm bridge to wifi so that vms get ip address via dhcp
Preamble
I've tried following assorted tutorials. None are specific to Ubuntu 22.04. Every one I've tried so far end up with me having to reinstall to get wifi working. Some assume the machine has a ...
- 133
0
votes
0
answers
3k
views
Ubuntu Server 22.04 LTS using netplan and networkd on RPi4b won't assign DHCP IP to wlan0
Fresh install of Ubuntu Server 22.04 LTS on a 4GB Raspberry Pi 4b with PRO activated. On the initial boot up, I didn't realize I needed to wait until the cloud-init sequence finished so I may have ...
- 19
0
votes
1
answer
126
views
network LAN ssh is running but internet can not connect
I have a old project to run an odroid cluster at home, thus I started configuring the network.
there is 5 Odroid XU4 with Ubuntu 22.04:
master with eth0 1Gbit/s 10.10.10.1 & eth1 100Mbit/s 192.168....
1
vote
1
answer
394
views
What is DNS resolver associated with a network interface?
I am currently working on ubuntu 20.04 machine.
What is exactly a DNS resolver/nameserver associated with a network interface?
when i am checking the /etc/resolv.conf file, i can see nameserver 127.0....
- 513
0
votes
1
answer
323
views
DNS lookup not working in a VM until I run dhclient
Have already spent 4 hours trying to debug why DNS lookups do not work when the VM boots up.
Not only did I try to debug the problem manually, but went over hundreds of articles on the internet, ...
user1686625
0
votes
0
answers
322
views
Recover DHCP lease if it has been lost
So my system lost it's DHCPv4 lease. Since this is the WAN uplink, the system then became unreachable. I can't see any trace that it has tried to recovery from this.
Apr 3 00:31:47 mistik systemd-...
- 370
0
votes
0
answers
110
views
DHCP inet address keep disappearing
I'm having trouble with network with Ubuntu embedded on a PYNQ board. By running ifconfig I can see that the inet address keeps disappearing and then reappearing. My network interface looks like this:
...
- 109
0
votes
0
answers
404
views
e1000e device loses dhcp lease repatedly
I have a M70q mini PC that is using the e1000e device driver for the ethernet connection. Whenever I attempt to ftp a file to the computer, it loses its IP address. It will regain the IP address but ...
- 83
0
votes
1
answer
243
views
How to block NetworkManager from changing a line from dhclient.conf when merging?
In dhclient.conf I have a line
send host-name = gethostname();
which I do not want to be changed by NM to
send host-name = '<current short host name>'
when generating the file in /var/lib/...
0
votes
0
answers
155
views
Discover new IP address by calling MAC address
I have two devices that is located on a remote network:
A Raspberry Pi running Ubuntu 20.04. Let us call it Alex.
Raspberry Pi Pico Wireless running my code only. Let us call it Bob.
Alex acts as a ...
1
vote
0
answers
347
views
Ubuntu 22.04.2 - loses internet randomly/ [closed]
So I have a machine running ubuntu server 22.04.2 with a wired network connection which seems to lose internet randomly.
Running a continuous ping from the machine to google.com skips big chunks in ...
- 11