Dynamic Host Configuration Protocol (DHCP) allows computers on the same network to automatically obtain a unique IP address.

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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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49 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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40 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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17 views

PC Laptop not grabbing a DHCP address from Apple Time Capsule

All of the Macs on my network are acquiring a DHCP IP address via Wi_Fi just fine. Multiple PC laptops are not obtaining a DHCP IP address from the Wi-Fi network. They do successfully join the Wi-Fi ...
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1answer
23 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
36 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
29 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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25 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
119 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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21 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
27 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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19 views

Windows DHCP vs third party DHCP software/tools

I would like to know, what are the benefits of using other third party DHCP software compare to Windows DHCP. What are the advantages/disadvantages or is there any limitation since Windows DHCP ...
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10 views

Revoking a dhcpv6 address lease

Is it possible to revoke a dhcpv6 address lease before it expires? For instance, if the prefix changes, is it possible to distribute new IPv6 addresses?
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3answers
52 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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36 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
44 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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29 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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21 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
37 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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1answer
195 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
46 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
36 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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7 views

Windows DHCP MAC-Range to Scope allocation [migrated]

I wonder if there is any options to map a specific Range of MAC addresses to a specific DHCP address scope. The thing is, I want a specific scope for address allocation to bridged Virtual Machines ...
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1answer
38 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. ...
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2answers
45 views

Cannot reach the computer in WAN

I wanted to split the internet connection in my room. And my brother also wanted a better wifi accessability. So we bought a router (NETGEAR JWNR2010v5). All we wanted works great, good wifi. I have ...
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2answers
47 views

Static IP hosts on WiFi router with DHCP

I have two wired hosts (a desktop and a laptop) connected to a router that also has a DHCP server enabled for WiFi access. When I restart my wired machines, they get assigned a secondary IP address by ...
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2answers
49 views

SSHD reverse mapping fails, but nslookup, dig, and host resolve correctly

I just set up a dhcp/dns server to manage my home network. After I got everything up and running (and maybe before - I wasn't paying close attention), I noticed that logging into ssh was slow. I ...
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2answers
46 views

dhclient can't get ip address

I have two interfaces: eth0 and eth1. eth0 gets ip address upon bootup, but eth1 never gets ip address. Here's what I get with sudo dhclient eth1 Internet Systems Consortium DHCP Client 4.2.4 ...
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17 views

dhclient not working for

I tried to get a IP address for eth0 via dhclient, but it hangs forever. Please help me find out what's wrong. I am running it inside a virutalbox guest machine. There're two interfaces, eth0 and ...
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2answers
42 views

Joining client to Server in VirtualBox

Having installed the trial of Server 2012 and a copy of Win 7 Pro in VirtualBox, I now need to join them together so the client can be in the domain of the server. I need to deactivate dhcp within ...
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14 views

Prevent DHCP Lease Updates From Adding Gateways

I am having a problem preventing DHCP Lease Updates from modifying my route table in Windows. My issue is that I am routing all my traffic through a VPN and purposefully delete the 0.0.0.0 route ...
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21 views

Does a flexible (e.g. DHCP) Windows multihomed wifi adapter configuration exist?

Given Location Configuration Internet & wifi modem address: 192.168.0.1 no DHCP iDrac remote server access: 192.168.0.250 Firewall router with NAT: 192.168.0.254 -> 192.168.5.0/24 DHCP & ...
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24 views

multiple DHCP servers for wireless users on same subnet

I am trying to set up 2 router in our network with following set up. 2 routers, 1 is the main router that DHCP is enabled to assign ip to all wired PCs, the other one can be assumed for guest, which ...
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1answer
28 views

How can my server announce its presence to everyone in the network [closed]

The situation is as follows. I want to have an application running on a server. All of the desktops in the company has to connect to it. But I do not want the IP address of the server to be hard coded ...
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15 views

/etc/ethers is not being read by dnsmasq

I recently configured dnsmasq on Raspbian, and everything was working perfectly except that /etc/ethers wasn't being read (yes, I did uncomment read-ethers and remember to restart dnsmasq) - the ...
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35 views

(Windows 7)Bridge: (tap+wifi) -> ok, (tap+ethernet) -> dhcp is not working. What are possible problems?

All this happen on win 7. I set up the ovpn bridged connection with wifi+tap bridged, and it worked fine. Now I need to make it use ethernet instead of wifi, but bridging of ethenet+tap has issues: ...
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2answers
59 views

How the WLAN interface of a home router do to reply DHCP requests just at connection time?

Using VirtualBox I created a VM with the following VirtualBox Network Settings: Attached to: Bridged Adapter Name: wlan0 ... .. . wlan0 is the wireless interface of my laptop, which is connected to ...
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1answer
53 views

Send files between two systems over LAN

I am able to send the files from one to another system connected on same router in a LAN. Now, I connected one more router to the first router to increase the range of wireless connectivity. When I ...
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2answers
50 views

How should I set up network using 2 routers so both see networked computers / printers

I have a Cisco DPC3825 DOCSIS 3.0 Gateway modem from my ISP that has 4 lan ports, and I have a second router Linksys WRT54GS (running DDWRT) that has a WAN port and 4 LAN ports + Wireless. This is the ...
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1answer
17 views

Connect two networks across another router

I'm trying to get a network setup with three routers, and three DHCP servers. Sounds silly, but if I can get it to work, I can eliminate a lot of re-wiring, etc in the building. I have a modem/router ...
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2answers
107 views

How to disable DHCP on Netgear CG3700EMR-1CMNDS?

I just got a Netgear CG3700EMR-1CMNDS from my ISP. How do I disable its DHCP server? I'm unable to find the setting.
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67 views

Windows Wireless Hosted Network (aka: Hotspot) - Port Forwarding and DHCP

I'm on Windows 8.1 and have been experimenting with the Wireless Hosted Network feature, aka: "Turn my computer into a WiFi Router". It wasn't hard to turn on, set an SSID and WPA pass, but now I'm ...
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1answer
56 views

How to make laptop (mac) to function as a router (with DHCP off)?

My ISP allows connecting only two devices. The MAC addresses of both my devices (MacBook Pro laptop and iPad) are registered with them. The problem is that I do not have a router, and the internet I ...
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1answer
46 views

Assigning fixed IP by DHCP in VMWare Workstation

Windows 7 host OS, Ubuntu 12 guest OS, VMWare workstation 10.0.2. I want my Ubuntu to use DHCP, but to get a fixed IP. Using the Virtual Network Editor I don't see how I can do that - is there some ...
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3answers
138 views

Windows 7 - Static DHCP server address with dynamic IP Address

Is this possible? On my LAN, I would like to setup the network properties such that the DHCP server's address is static. However, I want that server to hand out the IP Addresses and DNS addresses ...
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1answer
127 views

Systemd-networkd: How can I prepend a static nameserver entry to DHCP-discovered nameservers?

I'm using systemd 213 on Arch Linux, and systemd-networkd/resolved with DHCP to connect to the internet. I'm also running a caching DNS server on 127.0.0.1. I'd like to make this server the first DNS ...
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2answers
53 views

setup Mac Book Wifi interface as Wifi hotspot using specific DHCP option

I want to using my Mac Book as an access point. Besides that I also need to configure its DHCP server to not provide DNS info. For example, Mac Books AP's ssid is "MacBookHotspot". While my iPhone ...
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35 views

How to create a dhcpd.conf file

I have followed the tutorial on this page to create an access point on an Arch Linux install. It seems that went mostly ok apart from an error from DHCPD server: Internet Systems Consortium DHCP ...
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84 views

How does my ISP knows that I am sharing my internet connection? and how to bypass it?

I am in a student residence hall.There is one ethernet socket in the room. I can connect my laptop to the cable, but how can I get internet in my iPad? It will be good to have internet on both of ...
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1answer
40 views

How to eliminate the downtime when a dynamic IP address changes?

We currently have a number of client computers linked up to a database server (MS SQL 2008) for replication. The database server recognises the computers based on their Windows hostname. We are using ...