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

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dhclient “Can't bind to dhcp address” error

I keep getting the following error message from dhclient upon starting of the Network Manager: Can't bind to dhcp address: Cannot assign requested address. Please make sure there is no other ...
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2answers
63 views

IP reservation valid beyond DHCP

In my home network, can I reserve a certain IP to a specific device, preventing that it can be assigned to other devices? Usually routers allow IP reservation on DHCP, but if someone changes the ...
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735 views

Why won't my DHCP addresses “stick”?

I've been having some addressing issues that I've been unable to solve, and I'm hoping I can get some guidance about other things to research. Service provider is Time Warner cable. A static IP is ...
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2answers
196 views

Bridge two router

I have two router, i want to extend my wifi i have an tp-link AC1750 Router who are directly connected to my cable modem (192.168.11.1) it's ssid is: main_router, dhcp is enabled i have an tp-link ...
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209 views

APIPA (169.254.*.*) being assigned even with DHCP off in Windows 7

I've one eth interface on my home Computer which has two IPv4 addresses assigned. I use static addressing not DHCP. I am not assigning the 169.254.. manually, it's being assigned by something in my ...
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1answer
77 views

Log IP address obtained by DHCP Server-Ubuntu Desktop

Would there be a way I could write a script that records the dhcp IP's that the computer running Ubuntu obtains everytime it obtains a new IP?
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1answer
241 views

From my 192.168 box, how do i find 10.0 virtual machine on the same box?

I am running Ubuntu 12.04 and Virtual Box 4.1.12. I have created a Debian server under Virtual Box. For reasons I don't understand, DHCP grants my Ubuntu box 192.168.20.50 and my Debian VirtualBox ...
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2answers
2k views

How to get bridge internet connection to wlan0 from eth0?

I have hostapd and dnsmasq installed for distributing my wireless network with a WiFi dongle, and everything is working well. I am also able to connect an ethernet cable and get DHCP, plus internet ...
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34 views

Easy: Why does `network` command keep looking for an old router?

What am I missing in this manual dhcp configuration? I'm using CentOS 6. From Redhat's page I've setup a manual configured dhcp client: The /etc/sysconfig/network file should contain the ...
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1answer
81 views

Show pc with static IP on dynamic IP router

I have a router with dynamic DHCP where I created some fixed addresses for some things I want to use with dyndns. The problem is, that I have a pc/server which does not support DHCP/dynamic IP, so I ...
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1answer
101 views

Does Cisco 831 Router need to dynamically serve IP to use Cisco Router Web Setup?

I'm trying to get this $5 Cisco 831 Router up. I've managed to tty into the hardware setup. This launched System configuration dialog (I used this link's same setup). Since the unit didn't have a ...
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1answer
86 views

DNS and DHCP on different machines

I have a router (Vodafone easy box) which doesn't seem to support local DNS. Now i want to set up my own DNS server on another machine, but still want to use DHCP. So I want to setup my DNS server to ...
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190 views

Detect network clients connect and disconnect

I have a linux gateway/server, which sharing PPPoE internet connection between network users. Seeking for a proper way to detect when network clients are connected to and disconnected from the ...
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1answer
579 views

My domain name is doubled in dns on my centos 6.5 vm guest. server.mydomain.com.mydomain.com

my centos guest is set up as follows. It gets its IP address from DHCP. [marathon@server ~]$ domainname mydomain.com [marathon@server ~]$ hostname server [marathon@server ~]$ more ...
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1answer
490 views

Behavior of DHCP-client

This is a question about the Internet protocol standards. The DCHP-client (dhcpcd-5.2.10 from Android 4.x) initializes an interface The DHCP-client sends a DHCPDISCOVER message DHCP-server sends a ...
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995 views

How to configure AirPort Extreme as the DHCP/DNS/NAT server where DSL modem/router does them?

I have an AirPort Extreme BS and a modem/router (ISP's NetMaster). I want to host my own websites from my Mac Mini with OS X Server. At the moment, ISP's router is the DHCP/DNS/NAT server, and AirPort ...
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1answer
787 views

Windows 8 running Hyper V containing Windows XP with no connectivity

I've followed all the steps for setting up a VM and did it correctly. The VM started, i installed windows and added a virtual switch(external) with the virtual switch manager. I then added a legacy ...
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22 views

DHCP hostname option

The DHCP protocol includes a set of options as described in RFC2132. The option 12 defines the hostname. What is the role of this hostname in the DHCP protocol. Should the DHCP server use this ...
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1answer
27 views

Reproducible DHCP Addreses

I have a microcontroller based device with a bootloader and an application. The device has one Ethernet adapter. The bootloader uses IP/UDP to flash the application image. The application has a full ...
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1answer
272 views

Which server is selected by the client if it receives Offer from 2 DHCP servers at a time?

Which server's IP address is selected if the client receives the Offer from 2 DHCP servers (on different subnet) at a time? I searched Google and the answer I got is: which Offer comes first will be ...
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1answer
24 views

Using custom-defined IP address vs DHCP on Different Networks

On Mac OSX, is it possible to let the computer obtain a specific IP address (192.168.1.123) on wireless network #1, and let DHCP assign it a dynamic IP address on all other wireless entworks?
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1answer
957 views

Using dnsmasq with NetworkManager

It was well known that NetworkManager does not play well with dnsmasq (ref: here). I've skimmed throught the lengthy discussion here but still not sure what the recommended way to deal with the ...
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1answer
63 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 ...
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213 views

dnsmasq doesn't provide IP address to udhcpc

We have an embedded Linux device using udhcpc to get a DHCP IP address and a Wifi access point that provides it. Originally the WAP used udhcpc as well and this worked fine, but in order to add DNS ...
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1answer
745 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 ...
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2answers
881 views

In OS X, how can I prepend 127.0.0.1 to the list of DNS servers obtained through DHCP?

I am trying to use dnsmasq to resolve certain known domains using its configuration, but let the rest of the requests go through to the normal DNS server assigned by DHCP. I cannot get this to work. ...
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3answers
2k views

Add a static IP alias to a DHCP interface on Windows 8

I have a Windows 8 machine that has only a single Ethernet port. It needs to use DHCP and also needs a static IP. Each IP is in a different subnet, and each serves a different, incompatible purpose. ...
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3answers
133 views

Sharing Internet connection across LAN

For the life of me, I can't figure this out. I had it working once in my network, but never after that. I have two machines A (Win7-x64) and B (WinXP-x86), connected through TP-Link's TL-MR3420 ...
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259 views

Every time I ping one of my Ubuntu VMs from another VM I get a different IP resolved.. how could this be?

Every time I ping one of my VMs from another VM by hostname I get a different IP address resolved for it... Both VMs are Ubuntu 12.04 running on VMware Workstation 10. All VMs are running with ...
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47 views

I have a small computer with DHCP, but what makes it publish names to clients?

Set up a small ARM computer (cubox) with Debian. That has three NICs, one Internet, two local net. Basically, this is a router with a bridged interface (br0) and firewall. DHCP-server ...
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1answer
63 views

Can't connect to server when router is unplugged

So I have a network here where all computers are connected to a switch, including a local server. The router is connected to the switch which supplies the internet. It is also the DHCP server. Does it ...
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1answer
408 views

DDWRT: Is it possible to define the same ip for two different Mac-Addresses?

Is it Possible to configure ddwrt in such a way, that the dhcp server leases the same static ip (in my case 192.168.2.1) and hostnames for two different mac-adresses? I have ethernet and wifi in my ...
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334 views

DHCP settings out of range Internet shuts off after a few minutes

I recently upgraded from windows eight to windows 8.1 I do not know if this has anything to do with anything I have a 64 bit OS. My Internet goes off by itself every 5 minutes even though my wireless ...
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236 views

Setting Up Port Forwarding For Foscam Camera With Apple Airport Extreme

I am trying to setup a Foscam FI8189W IP Camera to work with my Airport wifi network. I have tried to follow the instructions that Foscam has given but I believe the problem is with my Airport setup. ...
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267 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 ...
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201 views

Can't get IP on Windows 7 after (even more) extensive troubleshooting

I posted here a while back about a problem pulling an IP from my router's DHCP on a Windows 7 machine. Since posting that message, I've taken even more drastic steps, but I still can't pull and ...
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1answer
4k views

TP-Link router sometimes fails to negotiate proper IP address

I'm trying to fix the WiFi connection of a family member. They get their internet from a cable modem. The modem is connected to a device that looks like a small Ethernet switch. This switch is ...
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1answer
547 views

Unidentified network on windows 8 pc when hard wired to Airport extreme

I have a weird problem which not been able to resolve as of yet. Okay so let me explain, I have recently had fibre optic installed, and I decided to use a new Airport Extreme (instead of the router ...
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3k views

Disconnect other users from DHCP client list

When I log in to my modem webpage I can see lot of employees are connected to WiFi network. This is okay. I have full access to the system and i want to disconnect the particular employee from the ...
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1answer
850 views

setting up wifi for static ip on ubuntu 12.04

I want to setup dhcp and static IP I have 2 lan card, Ubuntu 12.04 and it is a laptop the wireless interface I want to give a static IP and lan to have a dynamic ip how should I go about making ...
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1answer
3k views

Which clients accept DHCP option 42 to configure their NTP servers? [closed]

From what I can tell based on observations of my own OS X 10.8.5 machine, and the information in "Windows clients not using NTP server provided via DHCP," neither OS X nor Windows 7 are able to ...
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1answer
2k views

Two VirtualBox VMs running in parallel assigned same IP

I had one VM in my VirtualBox and wanted to use it as a template/image so I cloned it. Then I launched both the original and the clone simultaneously (to simulate a server cluster for something I was ...
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1answer
927 views

How can I find out IP adresses of DHCP clients when I setup internet connection sharing with Network Manager (Linux)?

I sometimes configure routers with my laptop and use connection sharing with Network manager and so my laptop acts as DHCP server. I then need to connect (via ssh usually) to the servers that are DHCP ...
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228 views

How to set up a VM gateway/DHCP and virtual network in CentOS KVM?

Today I have a working setup where the physical host runs W2k3. It has 2 physical NIC's. It runs Vmware server and I have a ClearOS VM installed acting as a FW/DHCP/DNS for both the host and all the ...
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1answer
366 views

Forcing resolver to OpenDNS's servers

I'm trying to configure Debian as a router/gateway on my network with eth0 going to my ISP's modem and eth1 to my LAN. eth0 needs DHCP so that it gets the proper IP address from my ISP modem, but in ...
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4k views

IP Conflicts via DHCP on Home Network & Multiple Router Setup

I currently have a Netgear ADSL modem/router connected to the telephone master socket, which has DHCP enabled. I then have a wired connection to an Apple Time Capsule in Bridge Mode, which is a ...
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3answers
110 views

How to retain a unique IP on a client with a static IP in a DHCP subnet?

When I say DHCP subnet I mean that the clients are intended to receive their network configuration via DHCP, not statically. Let's observe the following situation: I set up an IP address ...
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3answers
1k views

Does NAT Map to the MAC Address, or to the Local IP?

I would like to set up NAT to put a service on internet using my Technicolor TG 582 router. I mention the specific router model just to have a reference, but the question goes in general as I may ...
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1answer
66 views

My computer does not use DCHP, it only uses default adress? No network access

Recently one of my computer's network connection stopped to work. When I did an ipconfig I saw that the NIC was using the IP address outside the range of my DCHP server, something like ...
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172 views

why does my network disconnects from internet every couple of hours?

I have a broadband that here you can see its details. It provides wireless and also I got two more routers that use them as access points. DHCP is disabled on them and these two routers work are set ...