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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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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56 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
44 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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1k 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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36 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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417 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
1k 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
7k 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
268 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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404 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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85 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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49 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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342 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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1answer
873 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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4answers
23k 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 ...
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1answer
820 views

DHCP REQUEST is getting no response

I am new to dhcp world. I have a device with dhcp client which does not acquired ip address some times. When i started analyzing the dhcp frames through Wireshark i get following two types of frames. ...
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42 views

Troubleshooting DHCP relay

I have a home network with two routers connected through LAN. The main router is connected to the Internet. I've had connection issues with WIFI clients walking through the house as the client ...
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1answer
1k views

Can't add static lease from inside DHCP range in pfSense

When trying to add my computer to static lease, I get the following error I don't understand the reason for this. If I would want to assign IP from outside DHCP range, I would assign it statically ...
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2answers
2k views

How to force DNS for specific clients?

I'm running Shibby's Tomato firmware on my ASUS RT-N66U. What I'm trying to do is force OpenDNS IP's for certain clients (i.e. my kids) based on MAC address, while other clients get the router's ...
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1answer
2k views

Arch Linux - DHCP - Can someone diagnose this?

Arch Linux Wifi Connection Issues I am currently in the process of trying to install Arch i686 on an Acer Aspire One 532h (32 bit). At this point I am still in the LiveCD environment and setting up ...
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32 views

Can't acess WinXP from Win7 on domain

I have a Windows 7 computer and I can't access any windows xp machine using their computer name directly. eg. \\co01 but I am able to access them using the IP address e.g. \\192.168.0.55 So I need to ...
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2answers
1k views

Linux not resolving linux hostnames but does resolve windows hostnames

I have a network of computers, mainly Windows machines on a windows domain. I have 2 Linux machines, which are connected to the network and get their IP's via DHCP from the Windows 2003 server. My ...
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3answers
11k views

How can I override comcast's wonky DNS settings in the router resolv.conf?

Whenever I connect my laptop to my Xfinity router (TC8305C), it writes wonky settings into my resolv.conf. Rather than completely hard-codinging the settings on my laptop, can I override the settings ...
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1answer
101 views

How to create a DHCP server at home

I'm running Ubuntu 14.04 LTS on my server I have at home (just an old computer) I installed MAAS and I have a few netbook images I'm trying to boot, I have created a node in maas, but when I boot my ...
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29 views

2 dhcp server with one pool

I want to know if there is an option to have two DHCP servers with one pool. The reason for this unorthodox setup is, I have two router in remote locations on the same LAN (10.0.0.0) And sometimes, ...
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487 views

Why does “sudo ifconfig eth0 down” followed by “sudo ifconfig eth0 up” stop dhcp?

I am playing around in Ubuntu 12.04 trying to learn about networking. I learned that you can delete a network interface by running sudo ifconfig name_of_network_interface down However, when I do ...
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2answers
523 views

Running DHCP for ipv4 and ipv6 on different servers in the same network

I have a network where ipv4 addresses are assigned via DHCP on the router. The router, however, is capable of routing ipv6 but does not support ipv6 DHCP. Would running 2 DHCP servers (one for ipv4 ...
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1answer
42 views

Difference between configuring DHCP and starting service

On http://technet.microsoft.com/en-us/library/ee441263(v=ws.10).aspx, it says to configure and start DHCP on server core, do the following: At a command prompt, type: sc config dhcpserver start= ...
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225 views

Server 2008 VPN isn't working, DHCP coming from a different source

Alright, I have a Windows 2008 server running. It serves up DNS but not DHCP. I want to have VPN running on it, and my understanding is that you can do this as long as you set the DHCP relay server ...
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2answers
567 views

Two IPv4 adapters in same PC on same network valid?

Is it valid to have two network adapters on the same PC have the same network portion in their IPv4 address? If not why is my DHCP server doing so and how should I setup my DHCP server to have it ...
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1answer
613 views

Ubuntu getting wrong hostname from DHCP

When provisioning new Ubuntu Precise (12.04) servers, the hostname they're getting seems to be generated from the DNS search path, not a reverse lookup on the hostname. Take the following ...
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2answers
779 views

Why can't I get an IP address when switching access points until I reset the DHCP server

I read the article How can I get the same SSID for multiple access points? which is exactly how I set up my network. My main router with built in wifi, functions as DHCP server, then I have 2 ...
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87 views

Dilemma about how my wireless devices obtain IP address

Currently in my network there are 7 wireless outdoor equipment and 1 switch . This switch act as backbone switch for my network as internet supply from ISP is connected to this switch. Through this ...
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1answer
102 views

Strange Item on DHCP Client Table

I was recently having internet connection issues and looked on my router's DHCP Client Table. An item that stuck out was the name of my neighbor's WiFi Network. The table listed "Neighbor's WiFi ...
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1answer
431 views

Is IPV6 blocking my DHCP on Fedora?

I’m running Fedora 20 with KDE on a laptop I use for work. When I’m at home I use DHCP and when at work I have to statically assign an IP. When I came home the other day for some reason it doesn’t ...
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2answers
1k views

Linux NetworkManager not writing resolv.conf or running dhclient

I'm on a ubuntu based linux distro (linaro) running xfce. My networkmanager connects to wireless access points, but is unable to do two things: dynamically acquire a nameserver, and write a dynamic ...
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1answer
726 views

windows equivalent of wifi hotspot for lan

Is it possible in windows to create the equivalent of a "wifi hotspot", but for LAN instead - i.e. have the computer (with mobile 4g card for internet) share its internet connection with a LAN device? ...
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1answer
7k views

Ethernet connection shows unidentified network with no internet access

For years I've used a physical Ethernet connection for my internet access, then a few days ago it went down and said it was an unidentified network with no internet access. I dug out a wifi card and ...
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1answer
385 views

Removed VirtualBox DHCP still offers addresses. Why? How can I make it stop?

I have VirtualBox installed on a Windows 8 host. I was using the VirtualBox DHCP server for a while, but now I'm trying to switch over to a DHCP server installed on one of the guests. The VirtualBox ...
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2answers
178 views

How to detect the presence of network devices without assigning an IP address

I want to be able to detect if a certain device with a given MAC address is on the network, without requiring that the testing device's interface has an IP address at all. One way I could do it is by ...
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3answers
70 views

What specific roles does firmware play on routers?

If routers properly implement standard networking protocols (DNS, DHTCP, TCP/IP, etc.), then wouldn't the same firmware (implementing these protocols) be applicable to all routers? I guess I'm ...
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333 views

DHCP letting multiple devices get same IP address - how to trouble shoot?

I am using a win2008 server with AD to also serve DHCP and DNS. I have some wifi AP's that are giving me trouble (dropping connections and generally misbehaving). The issue that I notice is that the ...
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1answer
3k views

Netgear DHCP server doesn't provide the inputted dns servers to the connecting computer

I have NETGEAR JWNR2010v3 Router and I have configured it to static IP provided by the ISP. I have configured the preferred and alternate DNS servers provided by the ISP into the router. When I ...
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319 views

custom dhcp client on windows -manualy send discover and request packets?

My ISP has lease time 1 minute on its wifi connection. It basicly means that my system constatntly resets interface while setting same IP over and over on IP. When I set IP, gateway, netmask manualy ...
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472 views

How can I delete old IP configurations received via DHCP on Windows 7?

I noticed in the log of a DKIM verifier plugin for Thunderbird (that retrieves DNS servers to query from the OS configuration) that my Windows registry still has IP addresses for name server that ...
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2answers
143 views

How to configure Windows 7 to disable all network interfaces before hibernation and enable them on waking up?

Whenever I hibernate my laptop at home, go to the office an wake it up there I get an IP address conflict warning. IP is configured by DHCP (without any MAC binding) at both places so I think it would ...
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7k views

Active Directory Domain Controller with pfSense as DHCP and DNS server

I've read some conflicting posts, so hopefully I can get a clear answer. I have pfSense running as a DHCP server and DNS Forwarder. I'd like to try out Active Directory as a Domain Controller at home ...
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1answer
903 views

Will Windows renew IP address sometime after “ipconfig /release”?

On a Windows 2000 PC, I did a "ipconfig /release" to disconnect it from the network. After about 6 hours, I checked it again and it was still disconnected. But then about 17 hours after that, I ...
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2answers
299 views

How to resolve physical device for home LAN's 10.0.1.1?

Main question How can I find out the physical device corresponding to 10.0.1.1 (in my home LAN)? (I tried dig, which gave no physical device info, and nslookup and host, both of which failed. ...
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410 views

Ubuntu failing to acquire IPv4 over I217-V, Windows failing do the same over a USB Ethernet adapter

Just installed a fresh copy of 14.04, and ran into a very upsetting issue, which I wouldn't expect to encounter in 2014: Ubuntu refuses to work with my integrated network controller - Intel I217-V. ...