Questions tagged [dhclient]
The dhclient tag has no usage guidance.
89
questions
22
votes
3
answers
48k
views
How can I reload dhclient without restarting network?
I am using ubuntu 14.04 on ec2 instance, I am changing dhcp settings as part of the provisioning process, and I cant find a way to reload the dhclient. Infact, theres no way to restart network on 14....
- 321
9
votes
5
answers
33k
views
ifup cannot bring up eth0 after upgrading to 16.04
I've upgraded my server from 14.04 to 16.04. I can see following error on syslog:
ifup[478]: Internet Systems Consortium DHCP Client 4.2.4
ifup[478]: Copyright 2004-2012 Internet Systems Consortium.
...
- 285
9
votes
5
answers
32k
views
Why is dhclient saying: "SIOCSIFADDR: Permission denied"?
I have encountered a very weird error on ubuntu-server (8.04), I have no idea why dhclient is not allowed to set the network settings! I'm not the one who installed the server in the first place, so i ...
- 14.7k
8
votes
1
answer
15k
views
How do I turn off avahi-daemon on boot? [duplicate]
I just switched from Windows 8 to Ubuntu 13.04. I installed UFW GUI interface for the firewall. In the listening report it shows the something called dhclient and avahi-daemon running in a few ports.
...
- 81
6
votes
1
answer
3k
views
Ubuntu Server 22.04 LTS no DHCP on startup
I am wondering if there has been a regression with Ubuntu. Back when 18.04.3 came out, I noticed that my VM-based Ubuntu servers would no longer be able to get DHCP addresses from my Windows DHCP ...
- 61
5
votes
2
answers
3k
views
Why does apparmor kill dhclient?
I successfully upgraded my KVM server to 20.04.1 LTS but when later trying to access it by ssh, there were no network route to the server, while the VMs still were happily running just great. Logging ...
- 151
5
votes
1
answer
10k
views
Does Ubuntu 18.04 use dhclient?
I'm trying to figure out how to configure my DHCP client on Ubuntu server 18.04.
I have the following netplan configuration, coming from cloud-init:
network:
version: 2
ethernets:
...
- 121
5
votes
1
answer
4k
views
Apparmor denies several processes since a kernel change
I happened to encounter a very weird problem. I'm running Ubuntu 17.10 in development mode since around April, and ever since I have been trying to stay on the latest kernel RC to avoid nasty problems ...
- 513
4
votes
2
answers
7k
views
How can I automate a root command after (not during) startup?
I'm using Ubuntu 12.04 LTS, but I need to run the following command:
sudo dhclient
after startup to acquire a stable ethernet connection. I am running dhclient during startup already, through the /...
- 141
4
votes
2
answers
13k
views
Can't get ipv6 address using dhcp
I can get the ipv4 address using dhcp,But can't get the ipv6 address.
the dhcp server also support the ipv6 service.
ifconfig eth0
eth0 Link encap:Ethernet HWaddr: 00:21:85:d3:a3:36
...
- 2,152
4
votes
2
answers
39k
views
How to force dhclient to run?
I usually run with eth0 config'd statically from info in /etc/network/interfaces, but sometimes need to use a dhcp acquired config. Running dhclient just tells me it's now an upstart job and suggests ...
4
votes
1
answer
5k
views
EOF error when running dhclient command
When I try to use dhclient vpn_vpn it shows an error as below:
root@sunimali-HP-ProBook-450-G6:/home/sunimali# dhclient vpn_vpn
cmp: EOF on /tmp/tmp.EnmkqhupY9 which is empty
root@sunimali-HP-ProBook-...
- 41
4
votes
1
answer
7k
views
Regenerate resolv.conf from dhclient.conf without releasing/renewing IP?
When I make changes to dhclient.conf such as modifying the DNS search path (so that the changes don't get lost on reboot or DHCP renews), how do I regenerate /etc/resolv.conf? That page suggests ...
- 886
3
votes
2
answers
9k
views
I have to run command 'sudo dhclient' after every reboot
Since I have changed my router, on one PC I I have to run the command sudo dhclient eno1 after every reboot. I have upgraded to Xubuntu 20.04, but the problem is still present. How can I change that?
...
- 71
3
votes
2
answers
5k
views
Cannot access local hosts by name, but can by IP address
I'm new to Ubuntu and a novice in networking. I cannot access the hosts on the local network by name from my freshly installed 13.10 (no GUI) server.
It is not configured as a DHCP server. I use a ...
- 31
3
votes
2
answers
2k
views
eduroam randomly drops connection
As the title says, when on eduroam my internet connection drops after some time (usually after a couple of minutes when I have a lot of traffic, e.g. zoom meetings, when there is less traffic it might ...
- 279
3
votes
1
answer
450
views
Sify broadband dialer client fail to install
A few days ago I tried to migrate directly towards ubuntu 11.04,but find it difficult,because my internet connection doesn't works as it depends on sify dialer login GUI program provided on windows.
...
- 171
3
votes
0
answers
2k
views
dhclient not renewing lease
I'm running Ubuntu 16.04.3 LTS and am having a strange problem with dhcp leases not renewing on one interface. The machine has one physical interface and two VLANs; ens3, ens3.1001 and ens3.2002.
The ...
- 31
3
votes
0
answers
2k
views
Can I force dhclient to use the client identifier from /etc/network/interfaces
I'm using Ubuntu 12.04 LTS with isc dhclient version 4.1.
My goal is to use DHCP to get IP addresses for multiple sub-interfaces on eth0. I have three stanzas configured for that in my /etc/network/...
- 31
3
votes
0
answers
883
views
How do I configure DHCP client to use the "routers" option as well as the "rfc3442-classless-static-routes" option?
The DHCP server on my network sends the following options:
option routers n.n.n.n;
option rfc3442-classless-static-routes ...;
But the DHCP server is (incorrectly?) configured to send the actual ...
- 131
2
votes
2
answers
6k
views
Ubuntu 18.04 unable to reach DNS after upgrade
I recently upgrade my Ubuntu Virtual Machine (VirtualBox 5.2.8) from ubuntu 16.04 to 18.04 using do-release-upgrade -d. There were lots of issues during the upgrade. I kept having to restart/resume ...
- 121
2
votes
1
answer
7k
views
eth0: PACKET SNIFFER(/sbin/dhclient [duplicate]
Im new to Ubuntu and would like help please, I ran ProShield and got this error -
eth0: PACKET SNIFFER(/sbin/dhclient
I ran the following programs below and nothing came up as far as I can see. ...
- 21
2
votes
2
answers
943
views
No network from minimum net install
I did a minimum net install, but my new system is not starting the network automatically -- No IP address with my eth0 device.
I installed dhclient package myself but that doesn't help. I thought it ...
- 1,065
2
votes
1
answer
2k
views
Network Manager doesn't respect DHCP settings?
Had my Ubuntu 20.04 system running without any issues for months, but lately I had to start running sudo dhclient after every reboot, otherwise I am not able to connect to the internet.
I am fairly ...
- 151
2
votes
1
answer
3k
views
How to add specific option to DHCP request of Ubuntu
I added the following lines to my /etc/dhcp/dhclient.cong
option option125 code 125 = string;
option option125 0D:E9:19:01:06:31:32:33:34:35:36:02:0a:31:32:33:34:35:36:37:38:39:61:03:03:61:62:63
...
- 507
2
votes
1
answer
12k
views
How to start dhclient at boot?
Here's the problem:
root@home:~# ping 8.8.8.8
connect: Network is unreachable
root@home:~# dhclient eth0
RTNETLINK answers: File exists
root@home:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) ...
- 450
2
votes
1
answer
3k
views
Why does dhclient <interface> return a services related message?
I'm trying to use dhclient to set up a tether with dhclient, which worked in 11.04. However, upon upgrading to 11.10, I get the following message when trying to use it.
Rather than invoking init ...
- 21
2
votes
1
answer
2k
views
hostname is not set from DHCP server
I am using netplan to configure my wired interface via DHCP:
network:
version: 2
renderer: networkd
ethernets:
eno1:
dhcp4: yes
dhcp6: no
I uninstalled dhclient and installed ...
- 261
2
votes
0
answers
258
views
Use Same DNS Server (IPv6) for All Connections
I want to oblige a single computer to only use specific DNS servers, for all network connections, including new ones, and be sure that only these DNS servers will be used.
I've found a solution by @...
- 183
2
votes
0
answers
392
views
18.04 ignoring dhcp provided domain-name for name lookups during install
Brace for some pictures.. I'm installing "ubuntu server" using ipxe and I noticed that none of my short names work but the Fully Qaulified Domain Names (FQDN) do; the exact image being installed is as ...
- 344
2
votes
0
answers
551
views
DVR cleint software for Ubuntu?
My DVR is working for windows based Client software but I would like to use Ubuntu base client software to record the videos and images.
Can anyone suggest me the suitable software for DVR client ...
- 121
2
votes
0
answers
3k
views
Ubuntu 16.04.2: Excessive DHCPDISCOVER in syslog
I have an Ubuntu 16.04.2 server with 5 network interfaces (eth0-eth4).
The server started with 4 static interfaces.
ETH0,2 = WANs (with static public ips)
ETH3 = WAN (with static private ip)
ETH1 = ...
user127284
1
vote
2
answers
20k
views
Problems running dhclient
After running apt-get upgrade and restarting an Ubuntu Server install I noticed the computer didn't have a network connection.
I checked ifconfig
~$ ifconfig
lo Link encap:Local Loopback
...
1
vote
3
answers
12k
views
Two "search" entries in resolv.conf
I am using 12.04 and have a problem with my resolv.conf
There are 2 search lines there. But I can only explain one. I would like to get the other one removed.
carsten@myubuntubox:~$ cat /etc/resolv....
- 11
1
vote
1
answer
3k
views
dhclient.conf supersede stanzas ignored
I'm putting the following lines at the top (also tried the bottom) of my dhclient.conf file:
send host-name "hostname";
supersede domain-name "my-domain-name"
supersede domain-search "my-domain-name"
...
- 461
1
vote
1
answer
5k
views
Failed to send 300 byte long packet over wlan2 interface
Recently my syslog is getting flooded with these messages, every couple of seconds:
Aug 13 16:02:15 lati dhclient: DHCPDISCOVER on wlan2 to 255.255.255.255 port 67 interval 15 (xid=0x204c0015)
Aug 13 ...
- 751
1
vote
2
answers
4k
views
internet issues after upgrading to Ubuntu 12.10
I upgraded to Ubuntu 12.10 using update manager. After the upgrade, the wifi gets connected but would not display any webpages. If I ping 8.8.8.8 or google.com, there is response.
I managed to fix ...
- 9,836
1
vote
1
answer
2k
views
Is there a way to disable the systemd DHCP client in 18.04 LTS and switch to the dhclient command line client?
I have a group of automation configs and scripts for Packer, Terraform, and Ansible, that I use for deploying K8S clusters on our in-house VMWare cluster. All of this is working great now with one ...
- 113
1
vote
2
answers
404
views
Dual Boot computer can reach sites under Windows, but not under Ubuntu
I have a dual boot system: Win-10, and Ubuntu 20.04.
Under Windows, I can ping and get web service from everywhere.
Under Ubuntu, I get response from some site, but not others.
I boiled the problem ...
- 21
1
vote
1
answer
5k
views
Correct DHCP client configuration
I have two dhcp directories in /etc: /etc/dhcp and /etc/dhcp3
Which one is the correct direcotry for editing my dhcp client configuration?
I want to send the hostname with dhcp and so was trying to ...
- 143
1
vote
1
answer
2k
views
Many dhclient processes running?
Is it OK to have many dhclient processes running? Or is this an error and you should always have one such a process? What does it mean? Why is it listening? Is this computer a DHCP client or is it a ...
- 481
1
vote
1
answer
84
views
How to modify sbin.dhclient apparmor profile which is preventing automatic DHCP connection to network after upgrade to Ubuntu 24.04
After upgrading to Ubuntu 24.04 I can't make any network connections, wired or wireless with automatic DHCP enabled.
I have traced the problem to apparmor which is giving the following error messages ...
- 45
1
vote
1
answer
2k
views
I have to run command 'sudo dhclient' after every restart or disconnecting from wifi
I'm new to ubuntu. After installing a VPN, my internet stopped working. I searched for solutions over the internet. After a lot of trial and error, I figured that my internet started working once I ...
- 323
1
vote
0
answers
340
views
dhclient disconnects after few seconds
I have been fighting with the interface of my ubuntu 16 lts server to connect to a wifi on startup. Currently I connect using wpa_supplicant and dhclient.
If I do both manually, I get connected ...
- 111
1
vote
0
answers
2k
views
19.10 Ubuntu “Temporary failure in name resolution” Suddenly!
An Ubuntu 19.10 machine has been experiencing sudden loss of network connectivity. It is on the same network as several Windows and Mac systems which never experience these network problems.
When the ...
- 1,083
1
vote
0
answers
256
views
Why is /run/systemd/resolved.conf.d/isc-dhcp-v4-eno1.conf wrong?
Yesterday i updated Ubuntu 18.10, but after poweroff/poweron the DNS was wrong, so that routing worked, e. g. ping 8.8.8.8, but not name resolving.
So i overwrote the resolving files, e. g. /etc/...
- 389
1
vote
0
answers
332
views
No network connection after upgrading Ubuntu to 18.04 from 16.04
I have been trying to find a solution to my issue for three days now. Since the upgrade to 18.04, I cannot access the network, neither through cable nor WiFi.
I've tried different solutions from ...
- 11
1
vote
0
answers
22
views
How to get interface GETWAY with two WANs
I have 2 ISP connetions, first ISP use mac binding, second use PPPoE
/etc/network/interfaces
auto lo
auto lan
allow-hotplug gembird-white
allow-hotplug gembird-black
iface lo inet loopback
iface ...
- 157
1
vote
0
answers
687
views
How do I get Ubuntu 16.04 to generate a type 3 DUID instead of a Type 1 DUID?
I'm trying to get IPv6 set up on a client (no GUI) using DHCPv6. It appears that Ubuntu by default configures dhclient to generate a Type 1 DUID (LLT) - an ID based on the mac address and the time of ...
- 111
1
vote
1
answer
1k
views
Getting DHCP address in virtual machine with ubuntu 14.04 fails
I run Linux 14.04 in a virtual machine istalled on windows 10. I don't get an IP address in VM Linux (Windows ok). I see that ubunt looks on a wrong DHCP server address (I guess the variable is ...
- 11