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

learn more… | top users | synonyms

6
votes
2answers
10k views

PC does not get ip address from router using wired connection

I have an ASUS WL-520GU wireless router with four LAN ports. When my laptop is running Windows 7, and I make a wired connection from the laptop to the router, the laptop does not get an IP address. ...
2
votes
2answers
41 views

Want to know the local IP address assigned to me by my ISP

I use a TP-Link router (3420) to connect to my ISP. My local IP address is 192.168.0.22. The ISP uses DHCP and the router shows the range of it 10.19.xxx.xxx. Sites like whatismyip.com show the ...
2
votes
2answers
2k views

How do I gracefully fall back to AutoIP when there is no DHCP service available?

I am developing an embedded device based on Linux and Busybox, and trying to make it adaptable to different network configurations. I want to: 1- At boot time, if there is no DHCP reply, use an ...
2
votes
2answers
791 views

Laptop kicks other users off the wifi when it connects, then gets disconnected itself

I've got an Acer Aspire One running Linux. When I connect to my building's wifi, everything seems fine for a short period of time (I can google a few things or start downloading an Apt package), but ...
2
votes
2answers
563 views

How do I PXE Boot Only when I want it to without user intervention?

I would like to setup a PXE environment where I can re-image machines remotely without any user intervention. Only problem is when the re-imaging is completed it will do the re-imaging again and again ...
1
vote
2answers
20 views

DHCP categorise IP leases

I would make a major upgrade in my home network environment. I have a dlink 655 router. On this router All the DHCP will be happening. Also I will have 3 additional APs. I would like somehow to ...
1
vote
2answers
91 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 ...
1
vote
2answers
2k 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 ...
0
votes
1answer
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 ...
0
votes
1answer
611 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 ...
0
votes
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 ...
0
votes
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? ...
0
votes
1answer
43 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 ...
0
votes
1answer
139 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 ...
0
votes
1answer
133 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 ...
0
votes
1answer
29 views

Server 2008 DHCP on a wireless adapter

We have a Server 2008 (x86) computer which acts as a server, also as a router to share Internet into multiple network segments with RRAS. Everything works fine except DHCP on a wireless adapter with ...
0
votes
1answer
451 views

Use a combination router/modem as a slave to another router

I've got a combination cable modem/router from my cable company. I've also got a Netgear N900 that I love. I'd like to use the advanced features of the N900 (partitioning, guest networks, print ...
0
votes
1answer
1k views

Connecting 2 networks together via router

I have a small size business where we have around 22 PCs. At present, I have the internet connected directly to a switch1 (We use dedicated leased line and I have been provided with 5 static IPs by ...
0
votes
1answer
495 views

DHCP Pool Range / IP-Camera Setup

Lately I have been trying to set up a IP-Camera for friends wirelessly. I realized on their router its DHCP pool range is from 192.169.2.100 - 192.168.2.200. But when I changed the IP address of the ...
0
votes
1answer
429 views

DHCP fallback based on /etc/hosts lookup of your hostname

I have a Kubuntu box (12.04) which usually gets its IP via DHCP. However, it also has a hosts file with some entries in case the DHCP+DNS server fails. Now, if there is no DHCP available, I want the ...
0
votes
1answer
82 views

Using 2 wireless networks, 1 DHCP with internet, 1 using static IP without internet

I have 2 networks at home, 1 is for our home wireless internet,etc which uses DHCP and my other one is for my home automation (PLC's, etc.). I am wanting to use another wireless router without ...
0
votes
1answer
1k views

Windows 7 computer not renewing ip address on start up unless I reset computer

I recently reinstalled Windows 7, and I noticed that I do not automatically receive an IP address when I start up the computer. When I reset, it makes it get an IP address, and I can surf like ...
0
votes
1answer
689 views

how to access two subnet in one NIC?

I am wondering if it is possible to use one network card to access two subnet in windows. I need to access a (LAN) local ip 192.168.0.5/255.255.255.0 and WAN with DHCP. I google that someone suggests ...
0
votes
1answer
560 views

OS X Server keeps DHCP DISCOVER even with no client in the net. how to stop?

I have trouble with DHCP release, this server keeps NETBOOT or DHCP DISCOVER even if the specified device was logged out, and its wlan modul is tourned off. Wich leads me to - that the server is ...
0
votes
1answer
227 views

how to setup linux-igd to use webserver on same machine

So I have a web server on port 80 and linux-igd/upnp running on the same machine using dhcp. I want to configure linux-igd to be a way to get to the webserver. I found this tag in the linux-igd xml ...
0
votes
1answer
617 views

Router “ghost” connections

My Linksys WRT54GS2 V1 has begun to display ghost wired connections in the last weeks. As you can see from the images I have nothing connected except for the power cable. I have tried a hard reset ...
0
votes
1answer
236 views

How can I connect a wireless access point to an existing network (with a proxy)?

im new here, hope you guys can help me out. i was tasked to do the network (wireless and wired) of our new department in our company. our existing network has dhcp server(Windows Server 2003) and a ...
0
votes
1answer
1k views

CentOS DHCP server failover won't give out leases

I have followed this tutorial: http://www.madboa.com/geek/dhcp-failover/ However, I can not seem to get a lease at my windows client. I have set both servers (CentOS 6.2) in virtual machines, ...
0
votes
1answer
679 views

Windows doesn't send DHCP Request after DHCP Offer

I'm just at a friends place and we have problems with the WiFi. Scenario is, there are (about) 8 Android devices, all without any problems logged in to the WiFi and connected to the internet. Also, ...
0
votes
1answer
74 views

DNS Server for my home netwoek

I have a number of virtual machines all running on my ESXi host. These all connect to my home router, and are assigned an IP address through DHCP. When I go to connect to these VMs, they frequently ...
0
votes
1answer
820 views

Virtual Box Router - Windows Host, Linux Guest

I currently have Ubuntu Server running as the Guest OS in Virtual Box on a Windows 7 Host. The Ubuntu Server gets its IP from DHCP and is Bridged to the my Network Adapter. I've disabled Internet ...
0
votes
1answer
505 views

How to setup DHCP only on the wireless side of a router or AP?

We are currently running a simple network with unmanaged switches. We already have a Internet feed with router and DHCP. Im looking to add in another separate internet feed, with a 2nd router (NO ...
0
votes
1answer
193 views

Windows 7 ad-hoc internet sharing - How to share with static IPs?

I'm trying to share internet via ad-hoc connecting two Windows 7 computers. The ad-hoc network only works with static IPs, but when I try to share the internet, Windows pops a message saying that the ...
0
votes
1answer
928 views

IP conflict when connecting DHCP enabled PC to DHCP enabled laptop with its wireless and wired network connections bridged under Windows

I have a laptop running Windows XP SP3 with a wireless NIC and a wired NIC. I bridge the two network connections under Windows\Control Panel\Network Connections. This gives me a single bridged network ...
0
votes
1answer
781 views

Not receiving responses sent from a different subnet when my machine is on DHCP

I am building a utility to communicate with some hardware that comes with a default IP address of 10.0.0.1 and subnet mask 255.255.255.0. The hardware replies to UDP messages on the same IP and port ...
0
votes
1answer
947 views

PCs on domain can not resolve external IP addresses using the DC's DNS Server

I currently have a domain controller which handles all DHCP and DNS. The DHCP works just fine and the domain controller itself can use the internet with no issues. However, PCs that are part of the ...
0
votes
1answer
55 views

DHCP/routing oddness

I have a Squid proxy server on my network that is connected to the DHCPd server (commodity router) through a commodity switch. If there is a break in the connection (eg router needs to be rebooted) I ...
0
votes
1answer
451 views

IP address changes frequently & Computer is not available via hostname

I have a cable modem from my ISP to which I can only connect wirelessly. Currently I have a desktop PC(windows 7 x64) a dell laptop(windows 7 x64) an iPod(iOS 3.1.3) and a linksys wrt54g router (v8 ...
0
votes
1answer
514 views

DHCP Not Communicating with Wireless

Hi there I have just setup a DHCP server (experiment) on Windows Server 2008; as I have not done this before I have come across a problem. It will issue out Ethernet IP's however when it comes to ...
0
votes
1answer
985 views

dhcp6 server config problems

I'm trying to configure an IPv6 DHCP server in gentoo. So far: /etc/dhcp/dhcpd6.conf - subnet snippet: subnet6 2001:db8:21e:101::/64 { range6 2001:db8:21e:101::6 2001:db8:21e:101::100; ...
0
votes
1answer
1k views

DHCPREQUEST not replied

I have installed wpa_supplicant on Debian Squeeze so i can connect to my home and the school WiFi network. My home network is secured with WPA2 AES and I can connect to this network without any ...
0
votes
1answer
719 views

DHCP setting an IP on router but APIPA on computer

I took my computer with me while house sitting. Now back at home, DHCP is setting an IP on the router, but I get a 169.x.x.x IP on the computer. I've tried using a static IP but was unable to connect ...
0
votes
1answer
991 views

DD-WRT Seperate WLAN from LAN

I tried separating my WLAN from the lan following this tutorial. Unfortunately after the settings are changed, DCHP on the WLAN isn't working any more. I guess it may have to do with incorrect ...
0
votes
1answer
602 views

How safe is the IP address configured through DHCP?

I'm using internet through USB Dongle having GSM based 3G connection, it is using DHCP to configure IP address, I'm having a small HTML page in my computer that uses Google Maps and Browser's ...
0
votes
1answer
258 views

Multiple dhcp servers on separate lans connected to same modem - is it possible?

I have 2 clients who share a cable connection that has a modem/router on it. I call this one lan 0, which has dhcp disabled. There are two Cisco/Linksys routers attached to lan0, named Lan1 and Lan 2, ...
0
votes
1answer
2k views

Asus EEE PC 1005HA (XP Home) refuses to connect to Virgin Mobile MiFi

My client has an Asus EEE PC model 1005HA, and we're attempting to connect it to the WiFi network created by a VirginMobile MiFi unit. They also have a MacBook Pro with Snow Leopard that has ...
-1
votes
1answer
26 views

Only 2 Clients connected, yet router shows 4 IP addresses in the DHCP list

There are at present 2 devices connected to my home WiFi network, my laptop and my Raspberry Pi. The MAC address table on my router configuration page shows 2 clients connected but my DHCP client list ...
-1
votes
1answer
30 views

Requesting a new IP from the DHCP

In Linux, if I want to request a new IP say, for eth0, what commands should I use? Basically, how do I request a different IP from the DHCP so that it replaces my current one?
-1
votes
1answer
23 views

A br0 bridge interface appeared and mess up my network config

Problem This afternoon, I launched my openSUSE Leap 42.1 like everyday and then I quickly note that my networking was'nt working correctly. A quick ifconfig show me that a new br0 interface show up. ...
-1
votes
1answer
53 views

Windows Server 2003 DHCP

I have a scenario where user had ip's 192.168.1.100 to 192.168.1.160 previously it was 192.168.1.10 to 192.168.1.254 The problem is that the ip of the users on 192.168.1.19 and 192.168.1.42 is not ...