Dynamic Host Configuration Protocol; allows computers on the same network to automatically obtain unique IP addresses and other network configuration parameters.

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24 views

Internet drops - two routers handing out IP addresses?

My apartment block of 14 apartments share one fiber-optic internect connection. However, I've been having trouble setting up my wifi. I have two routers. 1) A D-link. This works out of the box, but ...
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8 views

How do I start udhcpc automatically on startup?

I used the following command: udhcpc -i eth0 and configured the eth0 device to DHCP.  Now, running ifconfig shows me my dynamic IP address. After I reboot the device, this configuration was gone; ...
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14 views

How to make udhcpc changes permanent in Poky (Yokto) Dizzy distribution

I used the following command: udhcpc -i eth0 and configured the eth0 device to DHCP.  Now, running ifconfig shows me my dynamic IP address. After I reboot the device, this configuration was gone; ...
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17 views

What is the correct syntax for the dhclient.conf supersede statement?

I am using the Internet Systems Consortium DHCP Client 4.2.4. I want to use the supersede statement to override two DNS servers from DHCP. The corresponding man page section reads: The supersede ...
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2answers
44 views

How to see what DHCP client does?

Does the dhcp client on Linux write any logs? If not, can logs be enabled and how? If it writes logs, where can they be found? How does a typical log of a dhcp client look like when obtaining IP ...
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1answer
42 views

How to configure DNS servers manually on Ubuntu server via bash?

I still want to use DHCP to obtain IP4 and IP6 addresses. DHCP delivers DNS servers I want that the DNS servers from DHCP are ignored and two servers I specify manually are used instead. Must be done ...
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39 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 - ...
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1answer
36 views

Server 2012 DHCP Policies

I'm studying DHCP and Windows Server. I have a virtual SOHO inside VMware, running the following config: SRV1 (Server 2012): 192.168.10.10 (Addr Reservation DHCP) DHCP Pool: 192.168.10.1 - ...
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17 views

dd-wrt subnet from network with in a network

I am testing some network configurations. I am trying to create a network within a network for TESTING PURPOSES ONLY. Basically the gateway for ARouter(made up name for main router) is 192.168.0.1(for ...
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1answer
26 views

OS X only picks up 1 of 3 DNS servers from DHCP on DD-WRT

I am running a DD-WRT router, and in the "Network Address Server Settings (DHCP)" section on the "Basic Setup" page, I have entered values for "Static DNS 1", "Static DNS 2", and "Static DNS 3". On ...
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18 views

dnsmasq pass a url using dhcp option 43

I have been reading the documentation of dnsmasq and different examples found on internet but I have been unable to succeed. I am trying to pass a URL to the CPE using dhcp option 43. The CPE is ...
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1answer
32 views

looking for a utility to test DHCP settings

Iv'e recently installed DHCP server (isc-dhcp-server) in my workplace. I'm looking for a utility to test the network DHCP settings from a remote machine (not by using dhclient / iptables /renew). ...
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2answers
35 views

Router without DHCP set and has external IP from local perspective

I have a network like: x.x.0.1 - ISP's AP, then mikrotik router x.x.0.5 -> set up by specialist and another router x.x.0.7 -> for my learning purposes. My problem is, that I really don't understand ...
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votes
1answer
60 views

DNS Resolution Errors on New Active Directory (Server 2012 R2)

In advance I thank you for any help or advice you can provide as I am fairly new to the concepts and config of Active Directory and related roles like DNS, DHCP etc. I have recently set up a domain ...
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1answer
28 views

Printer wasn't working. Gave it a Static IP and now it works! But why?

I was toying with my printer to get it to work. Originally, the printer was automatically given an IP of (169.254.248.206) However... I read that manually setting the printer's IP outside my ...
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0answers
17 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
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1answer
80 views

DHCP Reservations, SERVER 2003, easy way to Export txt\csv\xml

I have a list of DHCP reservations, Server 2003. I want to export (in all it is) a list of IP, MAC address. I need the list for view: sorting\store in of DB for later Query, not for importing later. ...
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2answers
34 views

Why does a device show up twice on my dhcp table? [duplicate]

I bought a new router yesterday, but I dont think that's relevant because on my previous router it happened too. The only change is that my first router wasn't dualband and this new one is. So that ...
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20 views

dhcp bridge w assigned ip address

You seemed to be the most helpful from what i read on most threads, so i'm gonna run this problem by you and see what we come up with. ill start with the problem my xbox 1 says i have an open NAT and ...
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0answers
30 views

Linksys EA6500 and Android DHCP

Situation: I have a Linksys EA6500 v2 Wireless-N router. About 2 months ago, I had to perform a factory reset because my ISP refused to accept that my router wasn't the issue with my Internet access. ...
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16 views

I cannot capture DHCPv6 packets on GNS3 using Wireshark

I have got a router set up as a DHCPv6 server connected to a host that gets an IPv4 & IPv6 addresses from it, however I am not able to capture any DHCPv6 packets at any point of the connection. ...
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19 views

Ubuntu server as DHCP server for dual stack

I currently have an Ubuntu server on VirtualBox set up to give hosts on my GNS3 topology IPv4 addresses, and it is working without issues. However, I would like to have that same DHCP server give out ...
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1answer
36 views

What's the use of search domains? [closed]

Something you often see as a configurable option for DHCP are the DNS servers and the search domain. Alright, DNS servers have an actual use, but I'm not so sure about search domains. It took me quite ...
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2answers
37 views

DHCP server used reserved IP

I am using DHCP server on centOS 6.5, I reserved an IP for specific MAC address my config file /etc/dhcp/dhcpd.conf option domain-name-servers 192.168.1.5, 8.8.8.8; ...
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10 views

Making multiple DHCP IP permanent in Ubuntu 12.04.5

I followed the instructions here Getting 2 IP addresses on one network card, using DHCP and this worked for me but how do I make it permanent in Ubuntu 12.04? Should I put it in some sort of cron job ...
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29 views

Win7 load balancing over 2 default gateways and 1 interface

This is a scenario I've been working on lately: My PC has 1 NIC connected to a 192.168.100.0/24 network. This network has 2 gateways to the Internet, namely .1 and .254. Now I want to get to the ...
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votes
1answer
36 views

Set DHCP with manual IP

Any idea how can we set a DHCP with manual IP address from the terminal OSX (for a wifi interface)? I know that this set a manual IP but not sure how to keep the DHCP: sudo ipconfig set en1 INFORM ...
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82 views

Dual boot Linux Fedora 22 internet not working

I recently installed Fedora x64 on another partition alongside with windows. I went over the install process many times before I got it installed and sometimes the internet would connect, but I'd see ...
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2answers
85 views

Why does DHCP uses UDP port 67 and 68 for the communication between the client and server?

I know that the DHCP is used to assign an IP address to the client and hence the only possible way to establish the connection is to listen on a specific port. But is there any specific reason behind ...
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14 views

Output of the Show ipv6 dhcp interface

I successfully configured the DHCPv6 server. My CPE is also receiving the prefixes. However, I am not to figure out some of the terms(which are in BOLD) in the output of the command "show ipv6 dhcp ...
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1answer
47 views

Configure localhost to use DHCP IP address

I have a local server Wildfly and I have a test application which I can access: http://localhost:8080 works. Now, I have comcast Xfinity with a modem (no additional router). I am working on CentOS ...
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2answers
149 views

DHCP failure when rebooting RPI 2

When we start up my Raspberry pi 2, we get the following error: When the RPI is rebooted, we are getting an IP and we are able to surf on the internet, so we don't know what the error exactly ...
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46 views

Several Routers and DMZ, WAN, Local LAN

I previously had: A PS3 directly connected to the router given to me by my ISP (Router A). I had the console in a DMZ on this router at IP 192.168.1.33 So I had enabled UPnP for this router and ...
1
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1answer
66 views

Connect TL-WR740N via wireless to TL-WR340G/TL-WR340GD

I have a TL-WR340G/TL-WR340GD, which is already setup (DHCP, if it matters) to provide Internet over WiFi. I have a spare TL-WR740N which I would like to connect over WiFi to the WR340G. While I ...
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22 views

Guest DHCP server

I have a host (CentOS 7 with kvm/libvirt). There are 2 network interfaces on this host. eth0 and eth1. eth1 has no IP address but instead has subinterfaces for each VLAN it is connected to. An example ...
2
votes
1answer
53 views

Disabled DHCP server on secondary routers, cannot access setup page anymore on those

I have the following network configuration in my home: The Telsey DSL modem+router is provided by my ISP and setup configuration page is password protected from them (not default one, I tried brute ...
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0answers
41 views

Samba 4 AD: “samba-tool dns” commands do not work from dhcpd script

I've set up my RPi 2 as Samba 4 AD DC with these instructions - https://wiki.archlinux.org/index.php/Samba_4_Active_Directory_domain_controller That page contains script ...
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91 views

How does the guest OS of VirtualBox get a valid dynamic IP address?

I have install CentOS 7 in VirtualBox, and want the guest CentOS using dynamic IP address. The network type is bridged. The host OS is Windows 7, and the network information is like this: I ...
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0answers
18 views

OpenWRT: Set individual DHCP credentials for different clients?

Consider a small network of clients and a router running OpenWRT. All clients are getting their IP informations automatically from the DHCP server of the router. The devices in the network should all ...
1
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1answer
62 views

Can't connect to router after turning off DHCP

So I was playing around with my router and dynamic/static IP addresses and after I tuned off the DHCP server of the Router I am no longer able to connect to the routers web interface even with a ...
0
votes
1answer
23 views

isc-dhcpd sanity check fail even though everything looks right

I have a machine in freebsd 8.1 and I am failing to do service isc-dhcpd start it keeps saying "Configuration file sanity check failed" Hint: I copy the /usr/local.rc.d/isc-dhcpd and ...
0
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1answer
80 views

Virtual Box Bridged network failed to get IP (DHCP) No DHCPOFFERS received

I am newbie in networking and virtual box configuration, I have spent several days dealing with this problem. My goal is to get Bridged network working. When I try to UP interface in my Virtual Box ...
0
votes
1answer
112 views

ESXi 5.5 - Management network with no gateway

I'm setting up a test lab for VMware in Hyper-V. I have 3 vSwitches in Hyper-V: -EXT01 -INT01 -INT02 I've also created a W2K12 VM in Hyper-V which has the following roles installed: -AD/DNS -DHCP ...
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1answer
64 views

systemd-networkd does not receive dhcp requests

host, container: fc21 $ systemctl start systemd-networkd.service $ systemd-nspawn -b -D `pwd` -M m1 --private-network --network-veth ... In container: $ systemctl start systemd-networkd.service $ ...
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26 views

How to configure two broadband connection on the network so that if one goes down other can automatically start catering to Internet requests

Our earlier setup was 12 PCs connected via a switch. These PCs can connect to eachother via LAN. Broadband connection was via ADSL modem cum router plugged into the switch so that all PCs get internet ...
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1answer
69 views

ipconfig/renew not changing the ip

I try to change my IP address assigned by DHCP using renew command, but it shows only the previous IP address rather than new one. Here is the command : C:\Documents and ...
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28 views

Remote Management address different from Computer Name

We are an educational institution with managed computers using a management server. Our computers are bound to an AD server as well for LDAP. The issue we are having is the remote management addresses ...
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0answers
33 views

How configure wpa_supplicant for different static ip addresses

I'm using Raspberry Pi and want it to connect at home to my "Home" network with 192.168.0.50 IP. If available my android network, raspberry should connect to it with dhcpcd dynamically. I found in ...
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1answer
109 views

Multiple virtual network adapters with their own MAC address and external IP address from the DHCP in Windows

I have been searching for a long time on this forum, and although there are many questions about the topic, I wasn't able to get a concrete solution to the problem. I want to have multiple IP ...
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16 views

Wireless home router redirects

I've got this problem: sometimes when I try to visit webpage, my router redirects me to 192.168.0.101(which is my default gateway) and wants to enter in router with username and password(default admin ...