All Questions
43
questions
0
votes
0
answers
590
views
Issues when setting up static IP on Debian bookworm
I have recently started hosting my server from my PC and everything worked perfectly until my public IP changed. I taught I have successfully setup a static IP but I didn't. Now I am in a loop of ...
- 1
0
votes
1
answer
123
views
systemd-networkd, DHCPv6 lease - On debian 10 and above, unable to find org.freedesktop.network1.Manager in busctl output
I need to extract DHCPV6 lease information and from systemd-networkd's code it seems like DHCPV6 lease is not stored on disk, but is exported via DBUS using org.freedesktop.network1.Manager node.
...
- 1
0
votes
1
answer
546
views
How to obtain reserved IP address from dnsmasq DHCP server?
I'm working on an assignment that asks me to connect 2 VMs to each other.
The first (king) functions as a DHCP server using dnsmasq.
The second (queen) is supposed to be provided with a reserved IP ...
- 1
1
vote
1
answer
2k
views
Debian Bullseye gets DHCP address instead of static after first boot
After a cold start, the NIC gets an IP-address from DHCP, not the static IP-adress that is defined in /etc/network/interfaces. After a warm boot, it gets the correct static IP-address. I have got a ...
- 21
2
votes
1
answer
2k
views
Prevent networkmanager to disable an interface if dhcp timeout when mixed dhcp and fixe ip configuration
I need to find a way for a computer to have both a fixed ip address AND have be a dhcp client on the same interface. So far it works great, I am using Debian 11 and NetworkManager.
The problem, is ...
- 301
1
vote
0
answers
1k
views
How to set the default outbound interface in Debian when using multihomed interfaces on EC2
In Debian 10 with an Amazon EC2 AMI (as of March 31, 2021), the /etc/network/interfaces file looks like this:
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d
...
- 153
0
votes
1
answer
174
views
order of dhcp interfaces
My debian server has two interfaces:
iface eth0 inet dhcp
iface eth0.40 inet dhcp
It gets ip-addresses and anything else from an isc-dhcp-server. (That works well in common.)
But the dhcp options ...
- 101
0
votes
0
answers
316
views
Automatic IPv6 WAN Address Negotiation
I'm running vanilla Debian 4.19 as a home router but am having trouble setting up automatic IPv6 address negotiation at boot. I think I have the right settings for the WAN interface (eno1) in sysctl....
- 293
3
votes
0
answers
136
views
WICD Network Manager: Takes over a minute to cancel a network connection attempt. Forced to wait for DHCP client to timeout
Debian Buster XFCE using WICD. I do a lot networking work: setup and diagnosis of routing and switching. As such, it's not so rare that I ask WICD to connect to a network that has no functioning DHCP ...
- 116
0
votes
0
answers
2k
views
Debian DHCP Client can't find DHCP Server
I have a big problem with DHCP client on Debian.
Fresh Debian 10 installation (from debian.org), DHCP Client can't find DHCP Server
Logs from syslog:
Listening on LPF/enp2s0/<mac>
Sending on ...
1
vote
1
answer
909
views
Where can I get Debian IPv4 interface identifier?
I understood that nowadays Debian (I only use Debian so I don't know about other distros) no longer use MAC address to get a DHCP lease.
My machine MAC address is : 00:15:5d:40:41:41
Looking at my ...
- 243
15
votes
5
answers
14k
views
Can a computer running a DHCP server assign its own IP address?
Can a computer running a DHCP server assign its own IP address, or does it have to be set statically? If this is a question which depends on the DHCP software, then my configuration is a Debian server ...
- 2,974
0
votes
1
answer
4k
views
Debian 10 configuration as router for private to private network
I'm currently struggling to get a debian 10 system working as a router between two private networks.
Allow me to try and depict the setup
Network 192.168.2.X <-> Debian 10 Router <-> Network ...
- 2,974
2
votes
0
answers
192
views
tcpdump doesn't capture DHCP Discovery
I tried to capture DHCP Discovery through the tcpdump:
# ip l | grep enp5s0
3: enp5s0: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
# tcpdump -ni ...
- 244
1
vote
1
answer
132
views
Slaying DHCP on a Debian Jessie virtual server
I have a problem with a Debian Jessie server running as an Intranet VMWare virtual machine.
This machine has been recently upgraded from Debian 7 Wheezy to Debian 8 Jessie (expecting continuing later ...
- 51
0
votes
1
answer
229
views
How to "forward" dns ip addresses one level deeper?
I have a mobo with 2 ports: eth0(WAN) and eth1(LAN) which i want to use as a router/gateway(NAT). But at first I want it to manage DHCP.
I've installed Debian, configured eth0 for dynamic and eth1 ...
- 379
0
votes
0
answers
3k
views
Configuring Raspberry Pi as DHCP/local DNS server, Stretch vs Wheezy
I've been using dnsmasq as a DHCP server/resolver on an old Raspberry Pi, running wheezy, for years without any problems. I decided to upgrade to stretch and, at the same time, to a Raspberry Pi 3B+.
...
- 379
0
votes
2
answers
856
views
DHCP server sending DHCPDISCOVERs
After upgrading to Debian 8 running isc-dhcp-server I began seeing these on the logs:
servername dhcpd: DHCPDISCOVER from yy:yy:yy:yy:yy:yy (servername) via eth1
servername dhcpd: DHCPOFFER on xx.xx....
- 173
0
votes
1
answer
1k
views
Static IP set in /e/n/interfaces, Debian 9 takes DHCP
Objective: Set box (fileserver, x over ssh, backup location) with static IP 192.168.1.192.
Router does not have static-by-mac functionality.
Problem: lines in /etc/network/interfaces:
auto enp0s10
...
0
votes
2
answers
306
views
What is the recommended FDQN for a local laptop on a DHCP home network?
I have a pretty common home network and a laptop that connects to it either by Ethernet or wifi and gets an IP using DHCP. What is the recommended configuration for FDQN, including hostname and /etc/...
- 212
1
vote
1
answer
448
views
OpenVPN: dhclient fails
If I start the openvpn client and then run dhclient tap0 to obtain an IP address, everything works fine.
When the same command is called by openvpn from a script (up option):
#!/bin/sh
/sbin/...
- 401
0
votes
2
answers
283
views
A way simple to resolve an domain different in my network
I am running a debian server in my local network. My internet-gateway is integrated in a Vodafone easybox (WLAN-)router.
To easily access my services from all my devices at every location I have an ...
- 11
1
vote
1
answer
786
views
On Debian jessie, can I specify which dhcp client is used for a particular interface?
I use the /etc/network/interfaces file on Debian to configure my network interfaces with DHCP. The relevant section looks like this:
allow-hotplug eth0
iface eth0 inet dhcp
allow-hotplug eth1
iface ...
- 113
0
votes
0
answers
113
views
dhcp server or routing rules on a lan with internet server
I have two machines : Imac with Mac OS 10.9.5 & a Debian 8 server headless
both have one ethernet interface and one firewire.
The DHCP is still on the router and has statics ip address, the two ...
- 1
2
votes
1
answer
2k
views
Get IP from DHCP server from other machine in Internal Network
I have two virtual machines:
Debian (Router) with one Bridged Adapter and three Internal Network adapters
Ubuntu with one Internal Network adapter
I installed on Debian DHCP server, I'd like Ubuntu ...
- 240
1
vote
2
answers
96
views
Wireless static IP configuration
I'm using Debian and I have trouble assigning a static IP to my computer to my local wireless network. I've setup my configuration files in my computer correctly but that does not seem to work.
...
- 192
2
votes
2
answers
2k
views
Debian server making many DHCP queries per second
I have a webserver running on a local machine, which spontaneously started to send about 400 DHCP requests per second, constantly changing its IP address, until I killed dhclient several hours later. ...
- 21
3
votes
0
answers
2k
views
Beaglebone DHCP Server Assigns its Own IP Address
I'm trying to run a DHCP server on my Beaglebone Black (running Debian), and I want to give it a static IP address - 192.168.17.1 - but it keeps assigning itself its own different IP address - 192.168....
- 31
0
votes
0
answers
126
views
Debian 8: Server makes routers dhcp crash
I've got an old pc with debian 8 running as home server. A small problem is that whenever the server uses a lot of network traffic, let's say while downloading torrents, it seems to crash the dhcp of ...
2
votes
1
answer
7k
views
Network interface configuration on Debian 6 (No DHCPOFFERS received)
I am trying to configure an interface to allow internet connection on a home server which runs Debian 6 x86.
The server is behind a router which has DHCP enabled. The router IP is 192.168.1.1 with ...
- 121
0
votes
1
answer
125
views
Detecting active devices on LAN from Debian based server
Simply: How can i detect if there are any active devices on lan?
More details:
I have home server which acts as Internet gateway and wifi access point. Because of server part of its configuration i ...
- 245
2
votes
1
answer
1k
views
Forcing resolver to OpenDNS's servers
I'm trying to configure Debian as a router/gateway on my network with eth0 going to my ISP's modem and eth1 to my LAN.
eth0 needs DHCP so that it gets the proper IP address from my ISP modem, but in ...
- 213
0
votes
2
answers
662
views
Alternative to a static lease/ip reservation
I used to have routers which allowed to make ip reservations based on MAC. But my current router doesn't have this option. What is the alternative for that?
Why do I need it?
I have a Debian server ...
- 5
1
vote
1
answer
1k
views
Restrict static IPs (Only DHCP) on Debian Squeeze
How can i restrict access to the Internet for users with static IPs? Can i disable free dhcp leasing?
I'm running Debian Squeeze with dnsmasq as dhcp server. All users has their own ip, mapped to mac....
- 45
3
votes
1
answer
8k
views
How to reload DHCP client remotely, in order to write new resolv.conf?
I'm trying to configure dnsmasq(8) on a Debian GNU/Linux system in a private DHCP-based network. During a local, manual setup - after installing dnsmasq istelf - one could simply include the line
...
- 146
3
votes
6
answers
28k
views
All statically assigned addresses, but dhcpcd still runs?
I have a VM (on ESXi 5.1.0) running Debian Wheezy (7.0).
eth0 has a statically assigned address. eth1 was DHCP-assigned, and now I want to make it static.
Here is my old /etc/network/interfaces:
# ...
- 338
3
votes
2
answers
5k
views
dhclient configures /etc/resolv.conf with invalid entry
I'm trying to figure out why running dhclient on my interface sets /etc/resolv conf to the ip number of my gateway(router).
This entry is invalid and each and every time causes inability to resolve ...
- 489
1
vote
2
answers
24k
views
"dhcpd failed" error when starting DHCP server
I am setting up a DHCP server on Debain (virtual machine) on Ubuntu 12.04 host, but unable to get it up and running.
My configuration is like this,
dhcpd.conf
ddns-update-style none;
option ...
- 13
0
votes
1
answer
1k
views
How to get new IP address on boot up?
In Debian Linux, how can I get a new IP assignment on boot up? I'm working with VMs and I am required that every machine gets a new unique IP after booting up.
- 689
0
votes
1
answer
2k
views
DHCPREQUEST not replied
I have installed wpa_supplicant on Debian Squeeze so i can connect to my home and the school WiFi network. My home network is secured with WPA2 AES and I can connect to this network without any ...
- 1
5
votes
2
answers
18k
views
DHCP table in Debian
How to view all assigned ip addresses on a Debian DHCP server?
It is usually easy to do on a standalone router through a web interface. How to do it with dhcpd in Debian?
- 113
2
votes
1
answer
976
views
dhclient overwriting resolv.conf
I'm setting up virtual dev environments and I want the hostname.domain to be something specific, eg- "barney.local". However my /etc/resolv.conf file keeps getting nuked because i'm using DHCP. I ...
rizen
0
votes
1
answer
1k
views
Problem with dhcp in Debian
I try to have a static ip adress on an host.
I execute the following commands :
$ ip address eth0 10.4.1.15 netmask 255.255.255.0
$ route add default gw 10.4.1.5
But later my IP address changes ...
- 447