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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DD-WRT to push alternate Name Servers to clients over DHCP

In order for WiFi DHCP clients to use directly 8.8.8.8 and 8.8.4.4 as name servers, DD-WRT has been configured as follow add dhcp-option=6,8.8.8.8,8.8.4.4 in /etc/dnsmasq.conf (reboot) since that ...
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306 views

How to set up Networking and DHCP in windows server 2012 inside VirtualBox?

Background: Three operating systems are installed inside VirtualBox: Windows Server 2012 R2 Windows 8 Pro Windows 8 Enterprise So, I want to set up the Server 2012 R2 as Domain Controller, DHCP, ...
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1answer
357 views

Network Config (Alcatel GPON (I-241W-S) & TPLink TL WR1043ND)

I have a fibre to home internet solution configured at my place, the Alcatel GPON receives the fibre cable and a LAN cable is fed from it to the TP Link router where the ppoe connection is etablished ...
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17 views

dhcpd3 not reusing IP for mac

I have an ip range with two ip-addresses defined as follows in my dhcpd.conf: subnet 192.168.1.0 netmask 255.255.255.128 { range 192.168.1.10 192.168.1.11; default-lease-time 600; ...
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1answer
90 views

Can I make my Router (DD-WRT) act as DHCP server for an unmanaged switch that is not connected to it?

+-------------+ +----------------------+ | | | | +------------+ | Cable Modem ...
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74 views

How does DHCP work when it's not “between” your modem and devices?

I've been looking into different options for running some services on a home server. One such option is Amahi. During the setup process they recommend shutting off any other DHCP server on your ...
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86 views

Domain name is not appearing in “work network”.Instead it displays “Network 9” [duplicate]

I have configured isc-dhcp-server and provided a domain name "anbu.com" along with the IP addresses and other details. My Windows 7 client got its IP address from the DHCP server. In the Network name, ...
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18 views

Cisco 1131AG: Wireless clients randomly unreachable

I have a weird issue with my 1131AG-E-K9. I set up a lab at home to get back into the topic after a few years break. My 1131AG is connected to one of the PoE ports of an ASA5505. Clients are 2 ...
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48 views

Split current network installation in two Vlans

here I got a (really) tricky problem In my home I have a basic router from my ISP and the DHCP Server that serves every mac address with a static IP in this configuration : Family devices : ...
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1answer
498 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 ...
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1answer
51 views

Internet access without NIC card?

If have a USB modem dongle for INTERNET connection. Can i access INTERNET from a brand new desktop/laptop without NIC card using this dongle? I feel that the dongle is just a modem ( with a DHCP ...
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180 views

Windows 7 DHCP flooding server with requests

Am attempting to connect a Windows 7 laptop to a Debian server running dnsmasq. The Windows 7 machine doesn't seem to like the DHCP info it's getting as it re-requests it every ~10 seconds. The log ...
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1answer
56 views

Unable to Set up DHCP and TFTP on Ubuntu

I want to transfer my kernel image to beaglebone black, and the guide mentions that I should have already set up DHCP and tftp on the host machine. I have set up the TFTP using: sudo apt-get ...
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1answer
145 views

How to setup this home network to allow connection between two subnets?

I have my home network currently set up like this: The Thomson router (192.168.0.1) is from my ISP and is pretty crappy. I have a much better Draytek Vigor 2820vn router that allows me to use ...
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1answer
37 views

Why doesn’t Windows Vista get an address from the DHCP server?

My Windows Vista PC does not get an IPv4 address from the DHCP server; viewing the network properties shows something (likely the DHCP request) being sent, but no packets being received. Manually ...
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1answer
55 views

DHCP with SOHO Routers turned off with DHCP Server

I am trying to learn some networking right now. I currently have a DHCP service running on my SOHO CISCO Router. If I turn off my SOHO's DHCP service and setup DHCP on a physical ...
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48 views

DHCP configuration for local DNS server

I have a server at home with several other computers/devices using DHCP to connect. The DHCP service is provided by the router. My ISP gives me a dynamic IP address so I use no-ip to get a fixed DNS ...
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98 views

Arch Wifi - Connects but doesn't stay connected

Arch x86_64 (plain install on mSATA via USB) Linux 3.17 NetworkManager DHCP enabled at boot via systemctl Generally, the host computer is a Surface Pro 1 w/ Marvell Avastar Wifi Card and connected to ...
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1answer
73 views

What could be disturbing DNS lookup on the local network?

Three windows computers setup to use hard coded 8.8.4.4 and 208.67.220.220 as DNS servers are not experiencing any problems. These servers were found using the DNS benchmark utilitiy found here. ...
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1answer
813 views

Windows Server DHCP role not working correctly in VMware Player

I've got a Windows Server 2008 running in VMWare player with the following roles: Active Directory Domain Services DHCP DNS The server is using the following credentials: The IP of the (DNS) ...
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2answers
425 views

DHCP for USB virtual ethernet interface

I'm attempting to connect my Arietta G25 Debian ARM board to my home network using DHCP (or failing that, a static IP in the correct subnet). I'm currently using the board over USB, which shows up as ...
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74 views

Networking a small office with VPN

Recently I purchased a CISCO RV042 Small Business router with VPN Capability, obviously to allow external connection to this office via VPN to access a NAS where business files are stored. I am not ...
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1answer
682 views

DHCP issues, possibly related to Netgear N300 (DGN2200)

Installed 'new' Netgear N300 (DGN2200-100UKS model number) Day 1: Install Changed router IP to 192.168.1.1 Setup DHCP range to 192.168.1.50 - 100 All clients connected and working, 4 Pc's ...
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1answer
44 views

Spoof DNS in a Rogue AP

I am using 2 interfaces on my computer, eth0 grants access to the outside world and wlan0 is where the Access Point is set up. My configuration is based on 2 networks 192.168.1.0 on eth0 and 10.0.0.0 ...
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1answer
36 views

Can My ISP's Assigning me a New IP Explain Poor Performance on my Home Network?

I have observed numerous times that poor performance on my home network, which is infrequent and characterized by slow transfer rates (especially over wireless), is resolved by rebooting the router. ...
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168 views

How to automate running the dhclient for wwan0?

in Linux Mint 17 I have to run sudo dhclient every time I connect and disconnect to/from the Internet using a mobile broadband dongle, because otherwise the connection is declared active but when I ...
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75 views

2 Routers on network, can i have them do different DHCP

I'm trying to fix a network that we want to have private and public access. Currently they have Verizon service with the actiontec wireless modem/router as the main router. They have the office ...
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243 views

D-Link Powerline AV500 Issues? One Powerline LED green and the other one not lit? Maybe also messing up DHCP?

A few times now I noticed while one of my Powerline adapters has a solid green LED, the other is not even lit. I understand the oscillation in my electric circuit influences the quality of the signal ...
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37 views

PC's and Laptops get IP from DHCP, but other devices don't?

We're having a strange issue. DHCP is setup on a Windows 2013 Server PC, it works fine for laptops and computers, even VoIP phones. But not for our access point (or devices connecting VIA the access ...
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1answer
67 views

How can I configure one of the ubuntu desktops as “dhcp-relay-agent”?

How can I relay DHCP requests from LAN to WAN in linux so that the desktop connected to the LAN interface can have Internet access from WAN? Note: WAN has Internet access.
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1answer
197 views

Routers Upstairs / Downstairs, allow them to talk?

I recently installed another router upstairs because the downstairs one didn't reach via WIFI. The second router takes its WAN connection from downstairs (I only have 1 physical connection to the ...
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2answers
51 views

How can I find any additional DHCP servers that may have been installled on my network by an intruder?

See this question for background: Is it possible to hide one's presence from the DHCP client list nmap finds all connected clients for me, and I haven't had any trouble on this front since ...
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94 views

LTSP server with existing DHCP Server

I want to setup a LTSP server on the computer that is already a DHCP server. I'm using zentyal 3.4 on the server, it's basically an Ubuntu 12.04 with zentyal-core installed on it. I have instaled ...
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1answer
382 views

Is it possible to hide one's presence from the DHCP client list

I ask because I recently changed my WiFi password after seeing some unfamiliar devices in the DHCP client list. After that, the client list only has familiar names now, but there is still some ...
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37 views

Static routes in ISC DHCP

I have an Ubuntu 14.04 server at home running bind and ISC DHCP. Bind is caching from unblock-us.com so that I can get access to US Netflix content. This all works fine. I'm running into trouble ...
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1answer
33 views

Defaultgateway do not detect MAC-addresses

Today I was experimenting a bit with the user interface of my cisco router that is the default gateway of my LAN-network. I have two computers and a couple of smartphones atached to it trought WIFI ...
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477 views

CentOS 7 can't get IPv4 address from DHCP server

I have classroom full of computer running CentOS 7 and only one computer can't get IPv4 address from DHCP server during boot, because NIC is not yet up, when dhcp client tries to get IPv4 address from ...
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32 views

Strange IP settings issue

Friend of mine is having a puzzling issue I've not come across before. Windows Vista box, logs into an SBS2003 domain controller @ 192.168.1.50. The first time the issue popped up (about two months ...
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1answer
104 views

How to simulate “global hosts file” on my LAN?

I would like to access machines on my LAN by names. Not with fully qualified names, but with names. Some of machines are Windows, another are Linux. All of them are obtaining IPs over DHCP, some of ...
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1answer
482 views

Hostapd. Devices disassocated even before connected

I am trying to create an Access Point with Hostapd in my laptop, which is running Debian 7.6 (wheezy). The laptop intended to be the AP is connected to the Internet via Ethernet (eth0) with static IP ...
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2answers
2k views

Windows Server 2012 - DNS and DHCP not working on client computers

Help me guys, my dns and dhcp server not working anymore. I used it for more than 2 months but then suddenly all my client computers can't get ip address but still dhcp in my server is running. I ...
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3answers
127 views

Use DHCP to only assign specific ip addresses to certain host names

Good Evening Everyone! Background: In my environment we currently assign all IP addresses manually because we are required to maintain a list of all ip addresses and what computers they go to. My ...
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1answer
138 views

Basic DHCP Leasing

I have really basic dhcp leasing question. When I connect a computer for the first time to my network. My dhcp server gives me an IP address for a specified time (say 1 day for this example). If I ...
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1answer
45 views

Network bridge loses its IP configuration

After certain uptime of my computer, network bridge adapter (includes WLAN and virtual machine) in my Windows 8 computer suddenly deconfigures from 192.168.1.9 (address made static at router's DHCP ...
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31 views

Change DNS to dynamic but NOT if IP is static?

I know I can use the netsh command to change DNS settings from static to dhcp, but does anyone know a way to tell it to do nothing if a static IP address exists?? Example 1) PC1 has a dynamic IP ...
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31 views

Special type of DMZ?

So I have a standard modem-router setup all great to go, my Modem gives an IP Address from my provider via DHCP according to my Mac address. All is good. However, I now want to expose a new virtual ...
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1answer
165 views

how to set a dhcp clientid via netctl via dhcpcd

I'm trying to set a string as dhcp clientid in a netctl profile. Here is what I tried so far: Interface=eth0 Connection=ethernet IP=dhcp #DHCPClient=(dhcpcd 'clientid="string"') #DHCPClient=(dhcpcd ...
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108 views

Can't find my router in bridge mode

I got a new router that supports WDS to extend the reach of another router that supports WDS. After a fair bit of struggle, it works, but I have to disable DHCP in the new router for WDS to work, and ...
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1answer
138 views

Understanding DHCP discovery specific subnet

I am learning networking and in class we are talking about DHCP. I understand that when a host just joins a network it does not have an ip yet so it sends out a dicovery message. we are using ...
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3answers
5k views

DHCP Reservation vs Static IP address

So after browsing some websites, some people are telling me that static IP address is the best. But others say the DHCP Reservation is just as good if not the same. So what is better? Or are they ...