DHCP is an auto configuration protocol used on IP networks.
0
votes
1answer
24 views
OpenVPN clients cannot share their connection to the Internet
Context: a Wifi VPN gateway (Linux Ubuntu computer)
Simply One distant Server (www.example.com) and One Client (Paul, Ubuntu Linux, gateway) linked with openVpn. Server allows Paul to ...
2
votes
1answer
39 views
Set static IP when DHCP server is unreachable
I can configure RPi for DHCP client.
But when the DHCP server is unreachable, I want to set specific IP.
How can I configure dhclient for this?
0
votes
0answers
11 views
Virtual nics and dhcp testing
I need to conduct some testing and want to create 2 virtual network interfaces in Linux and bridge these to a physical nic. I need to test sending specific dhcp client parameters to a dhcp server on ...
0
votes
0answers
12 views
OpenVPN “breaks” my local DNS down
Context:
Router-computer (Ubuntu 14) runs a wifi AP (wlan0), as a router between clients and Internet (on eth0).
For DHCP it uses isc-dhcp-server and DNS resolvers are defined in ...
0
votes
0answers
30 views
My dhcp client isn't getting the dns server address
I have a network with diskless booting(tftp,pxe,nfs), the clients are working(receiving ip,gateway,etc), but they don't receive the dns address, what it can be?
this is my dhcpd.conf:
...
1
vote
3answers
62 views
Trying to get Ethernet working in Linux
I just installed Fedora 22 alongside Windows 10 on my desktop and I've been trying to get the Ethernet to work for a long time.
There is no wireless and this is my only source of internet connection ...
0
votes
0answers
42 views
isc-dhcp-server [ok] and running but doesnt seem to work at all
I am attempting to create my own Wireless Access point with compatible hardware and software.
Running cmd service isc-dhcp-server start and service hostapd start on my Raspbian box returns
Running ...
1
vote
0answers
19 views
Is the ordering of blocks within /etc/network/interfaces important? if so why?
I am using raspbian and have came accross a problem when using isc-dhcp-server .
The problem seems to arrise when I change the ordering of the blocks within my etc/network/interfaces file
For ...
0
votes
0answers
39 views
isc-dhcp-server conflicting with /etc/network/interfaces - Multiple instances match the same subnet
I am running Raspbian and trying to run cmd service isc-dhcp-server start.
This returns the msg
[FAIL] Starting ISC DHCP server: dhcpd[....] check syslog for diagnostics. ... failed!
my ...
0
votes
1answer
43 views
Debian ssh Cannot Resolve Hostname on DHCP Server
I used to connect to my raspberry pi via ssh using the hostname of the pi and vice versa. Now that doesn't work. I can connect by using the ip address, but that changes daily and it is annoying to ...
1
vote
1answer
30 views
DHCP server with static IP not resolving hostnames (clients do)
Network Setup
I have a server which I am trying to set up LXCs on
I am using LXD which forces me to use DHCP
DHCP is working fine already
due to my setup I need to be able to access the containers ...
1
vote
1answer
24 views
What module in the kernel that inform the DHCP client to start DHCP negotiation?
DHCP client is a process instead of kernel code. How the DHCP client know when to start sending DHCP discover message? Is it the IP module in the kernel that inform the DHCP client?
0
votes
1answer
48 views
How to get new ip using dhcpcd
I'm using 64-bit ArchLinux and dhcpcd. How to retrieve new IP using dhcpcd? I've tried to restart the daemon, the IP address i got still the same
$ ifconfig
enp3s0: flags ...
inet xxx ...
$ sudo ...
0
votes
0answers
14 views
Unable to connect to internet after assigning fixed IP via DHCP
I've setup my RaspberryPi(NOOBS) as WiFi router by following online guides.
Yep, I'm running hostapd and isc-dhcp-server on it. I directly plugged in RJ45 cable provided by my internet provider in to ...
0
votes
1answer
34 views
BusyBox : dhcp client seems to cause NFS mount to stop working
I have a BusyBox based embedded Linux system, mounting the RFS via NFS. This works fine except when I try to use udhcpd to get a DHCP address for eth0. This then causes the NFS mount to stop ...
4
votes
3answers
87 views
How to skip DHCP if no cable connected to ethernet in Debian
My Bananian Linux is wasting time at logon trying to get a DHCP lease for eth0 interface which is not connected. Well, the extender cable is connected to it, but nothing is on the other end.
I have
...
1
vote
1answer
39 views
Networking fundamentals: what IP is assigned a NIC if there is no successful DHCP negotiation?
On Windows computers, when there is no DHCP server found on the network interface, it gets assigned some IP address like:
169.254.x.x
So it is supposed you can find it on the network using tools ...
0
votes
0answers
54 views
Wifi Hotspot dnsmasq no DHCP ACK
I am creating a Wifi hotspot with hostapd and providing DHCP/DNS through dnsmasq. When a client connects to the Wifi hotspot it is subsequently unable to obtain an IP address through DHCP. The ...
0
votes
0answers
30 views
ArchLinux - DHCPCD timed out during dual boot installation from USB
I am trying to install a Dual Boot ArchLinux with Windows 7 running already on my machine.
I have succesfully "burned" ISO on my USB using Rufus. After botting up, I manage to access Live ...
0
votes
1answer
49 views
Problems setting up Ubuntu Machine as a router
I have been at this for over 24 hours, here is what I have so far.
-I have an Ubuntu Server running version 14.04.2.amd64, called SV-01
-SV-01 has two NICs. ETH1 is for the external network (goes to ...
0
votes
2answers
63 views
Disable DHCP without altering 'interfaces'
I have a bunch of RPis running in read-only filesystems that are not able to modify the /etc/network/interfaces file.
As of right now, they load their configurations off of a USB stick and use ...
1
vote
1answer
95 views
Arch Linux: Despite ot static ip configuration I get a DHCP address
This is very strange to me. On my Raspberry Pi running the latest Arch Linux I disabled all the DHCP service on ETH0 and everything else DHCP:
rm /etc/dhcpcd.duid
pacman -R dhclient
pacman -R dhcpcd
...
0
votes
1answer
23 views
dhclient equivalence of 'dhcpcd -T' command
In dhcpcd, there is an option -T which is declared that:"Test case, when dhcpcd goes through the DHCP negotiation sequence but doesn't actually configure the interface."
I would like to do the same ...
0
votes
0answers
22 views
List of available networks disappears after 15 seconds Lubuntu 14.04
When I boot lubuntu 14.04, running on my Dell 11 chromebook, if I click on the network manager applet in the panel it lists the 8 or so networks in range. After roughly 15 seconds, all the networks ...
1
vote
0answers
28 views
How to trigger dhcp4-change using nmcli?
Am working on a networking script which will do certain things interface up/down/dhcp4-change events happen.
And I need to generate these event through Network manager, not through dhclient.
So how ...
0
votes
1answer
33 views
in freebsd add DHCP IP as an alias on top of statically configured IP to the same interface on console (not by config files)?
I need to find a way to configure an alias by DHCP but not touch statically configured IP of the same interface and have to do it all by console, not by editing some conf files.
As far as know you ...
1
vote
1answer
66 views
Access Point offers itself IP if used as DHCP Server?
I'm trying to use an raspberrypi (OS=raspbian 4.0.7) I had flying around so I researched a little bit and everything seems to work more or less fine.
I am using hostapd in combination with an wifi ...
1
vote
2answers
89 views
Trying to install a cluster, DHCP failing to start
Trying to install a linux cluster using this tutorial. I am running CentOS 6.3.
When I try to start DHCP with service dhcpd start, it fails. I've used tail -f /var/log/messages and dhcpd -t, but I ...
1
vote
1answer
25 views
dhcp3-server and strange DNS/NTP servers
I have problem with dhcp3-server 3.1.1-6+lenny4. My dhcp-server sends "strange" IPs for DNS and NTP servers in DHCP ACK despite configuration which doesn't have those IPs. In ACK packet we can see the ...
0
votes
0answers
14 views
OracleSolaris 11.2 and DHCP configuration failure
I want to have IP address assigned by DHCP, so I set:
% netadm enable -p ncp Automatic
It seems that after this the dhcp agent has been initiated, and throwing errors:
ip: WARNING: net0 has ...
0
votes
1answer
45 views
centos firewall seems block dhcpv6 reply message
It's very strange that my CentOS cannot receive dhcpv6 reply message from dhcpv6 server. I have enabled the rule dhcpv6-client.
Every time I try to bring up the interface, dhcpv6 request messages are ...
0
votes
0answers
32 views
Access point doesn't give IP adress after DHCP request
I'm trying to achieve this : http://askubuntu.com/questions/318973/how-do-i-create-a-wifi-hotspot-sharing-wireless-internet-connection-single-adap
Almost everything works fine, but my dhcp server ...
0
votes
1answer
172 views
DHCP and read-only root filesystem
When doing ifup wlan0 on a system with / mounted as read-only (embedded computer), I get this error:
Failed to connect to non-global ctrl_ifname: wlan0 error: Read-only file system
Internet Systems ...
1
vote
1answer
30 views
How to broadcast two access points?
How do I broadcast two access points with two WiFi cards with hostapd? Most tutorials don't work since udhcpd doesn't work with two access points.
Example tutorial: ...
0
votes
0answers
25 views
Restarting dhcpd.conf failing
I am trying to setup a Kickstart server and when I am trying to restart the dhcpd server after having updated dhcpd.conf it is throwing a "failed" error.
I am installing the Kickstart server on a ...
0
votes
1answer
31 views
DHCP server does not appear on nmap, no errors
I have tried to get into Ubuntu thing recently (newest edition), but I've got a problem with DHCP server. I configured the files /etc/network/interfaces and /etc/dhcp/dhcpd.conf according to my ...
1
vote
0answers
37 views
How to get router info in “dhcp4-change” event in /etc/dhcp/dhclient.d/ script?
Am trying to add a script which will get executed on DHCP ip change for a particular interface.
for that I have copied the below script at "/etc/dhcp/dhclient.d/dhcp-hook.sh". I need to get router ...
0
votes
1answer
269 views
Configuring Network using dhcpcd
I have installed the new raspberrypi-net-mods using dhcpcd on my Pi running the latest Raspbian. This works, but I am trying to understand why and how. I have read the dhcpcd and interfaces man pages ...
0
votes
1answer
30 views
dhcpd restart command asks for password from command line but not from a script?
I have a script that runs and will ssh into another server to restart its dhcpd.
In the script, the command literally is:
sudo ssh -n $SERVER /sbin/service dhcpd restart
This works fine when the ...
1
vote
1answer
100 views
Static IP changes to dynamic automatically after time
I have found only one discussion about my problem here, but not a solution.
I have access to one Debian 7.8.0 amd64 virtual machine (under VMware) and its IP address is gained through DHCP, e.g., ...
0
votes
0answers
317 views
Virtual Box Bridged network failed to get IP (DHCP) No DHCPOFFERS received
My goal is to get Bridged network working.
When I try to UP interface in my Virtual Box VM, it tries some DHCPDISCOVER messages, but eventually I get No DHCPOFFERS received.
I found where is the ...
0
votes
1answer
93 views
Problems Setting Up DHCP Server On CentOS 6
I have been trying to set up a DHCP server on CentOS 6 running on an Intel NUC i7. I have installed dhcpd and am using the example dhcpd.conf
subnet 192.168.1.0 netmask 255.255.255.0 {
option ...
1
vote
1answer
501 views
TFTP times out in CentOS 7
I have an isolated server that telnets into the single device on its network and loads a file to it using the telnet command load. I am trying to recreate the functionality on another PC. The old ...
1
vote
1answer
108 views
How to block the response of certain DHCP server
There are multiple DHCP servers that run on our LAN, and some of them are unwanted. Can I configure my OS to reject certain responses so that I can get the correct one?
1
vote
0answers
114 views
Configure a freeRadius server with dhcp function
I have installed a freeradius server on a debian machine and it is working correctly.
I want to configure my freeradius server to provide IP addresses for the authenticated users!
Can any one tell ...
0
votes
0answers
31 views
dhclient allows for address conflicts
I invoke from my application dhclient but there is a problem with IP addresses conflicts. If I have other interface with statically set IP address, dhclient does not send DHCPDECLINE when DHCP Server ...
0
votes
0answers
21 views
dnsbind not working from client end
I am trying to configure dnsmasq in a virtual environment. I have created 2 VMs in VMWare Work Station. Was successful in installing and configuring DNS Server and able to do nslookup of client and ...
1
vote
0answers
37 views
Multiple DHCP Offers - Which is selected? [closed]
I have created a testing scenario in VMWare for a man in the middle attack using DHCP spoofing. It's for a college project.
Windows 8 machine bridged to host adapter
Kali linux bridged to host ...
1
vote
0answers
29 views
Does dnsmasq automatically update when running as a dhcp server as well?
I want to set up dnsmasq on a Raspberry Pi to use as a DNS server for my home network. My goal is to have a setup where when a new device is connected to the home network, it can be addressed by its ...
1
vote
0answers
175 views
dhcp ipv6 dynamic prefix delegation
I'm trying to setup Linux-based home gateway with IPv6 support. IPv4 configuration is finished and I'm using IPv4 NAT, ISC DHCP for addresses allocation, PowerDNS for local DNS setup, PDNS recursor to ...
