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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Dnsmasq running on raspberry pi will serve non-local DNS to ethernet but not wireless hosts

I have a Linksys WRV200 wireless router. I have just added a raspberry pi, connected via ethernet, working as a DCHP server and caching DNS server. Dnsmasq also serves local domain names. Dnsmasq ...
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2answers
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How to use the internet modem DHCP on a LAN created by wireless router?

My home network description: [Laptop] -> [Wireless Router] -> [Internet Modem] -> [Internet] Sorry if I'll say something noob I'm not a professional on networking. I have a LAN created by ...
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1answer
65 views

How can I point a domain at a changing IP?

So I'm running a website off my own server. I piggybacked off my dad's domain; I added subdomain, evamsharma.finosus.com, and pointed to our network IP, and set up port forwarding. But when I logged ...
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2answers
2k views

How to configure the network interface with a dynamic range of IP addresses?

I am new to networking, so please bear with me. I have two network interfaces. One network interface is connected to the external world. Another network interface 'p3p1' is what I want to use for ...
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iPhone self-assigning IP address 169.xxx.xxx when connecting to my slave router

My aim is to have a network configured where all devices can see and communicate with each other, all devices should have access to the internet as standard. The reason why I have decided on a ...
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1answer
323 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 ...
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1k views

DHCP option to control interface metric

For some reason Windows is using only one interface for local network broadcasting (the one with lowest metrics). When client connects to VPN network, i want it to make new network preferred for ...
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1answer
487 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 ...
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1answer
366 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 ...
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1k views

How to force a new DHCP discover

I'm analysing my network traffic at home, and I want to force my Mac to completely renew its DHCP stuff. Renewing my DHCP lease only reveals two DHCP packets sent over my interface, but I want to see ...
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Two network-ranges, one gateway - Double NAT issue

I have one network 192.168.0.x which is slowly running out of IP addresses. I wanted to remedy this by creating a second network for mobile devices (192.168.1.x). The first network has a gateway of ...
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39 views

How could I diagnose a computer (INTEL board with FreeBSD) that does want to acquire a DHCP address?

I have a system that comprises 3 logic boards with 3 different CPUs (3 computers in one systems). They are all attached to a router that is connected to a wifi bridge. Of these 3 boards, only 2 ...
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2answers
5k views

Getting strange IP Address from router

I've had a router set up for quite some time and it has been working perfectly. My wife called me to tell me the wireless internet wasn't working and when I came home I saw that my phone was connected ...
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1answer
280 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 ...
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1answer
442 views

Dynamic DNS for RPi -> Airport Extreme (DHCP) -> Cable Modem (DHCP) -> Interwebs

I have a Raspberry Pi which connects to my Airport Extreme via DHCP. The Airport is connected to my Cable Modem which gets its IP address via DHCP from Comcast. I would like to be able to address the ...
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1answer
4k views

“RPC is unavailable ” while renewing IP address or connecting to broadband over ethernet

I already looked for solutions on internet and on this forum but it did not help so posting a new question. I have windows 7 Professional and i connect to broadband via ethernet (always on). When i ...
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1answer
1k views

Why does my (home) router append a DNS suffix?

I wonder if any other people have come across this. I've rented rooms in two houses this year, and they both have Sky (a UK ISP) Broadband routers. For some reason, the router I currently use hands ...
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477 views

Network resource access control (maybe using VLANs?)

I'm trying to set up a network that has a couple of different device groups with different access rights. Physically, devices are connected to the network either via wall-ports or via one of several ...
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3answers
261 views

Why will my wireless router allow wired clients to get an address outside the router, but not wireless ones?

I have a "main" router that connects to the internet, and then a wireless router that connects to that. The main router's DHCP is disabled, and a computer hooked to that has a DHCP server running ...
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1answer
67 views

Detecting active devices on LAN from Debian based server

Simply: How can i detect if there are any active devices on lan? More details: I have home server which acts as Internet gateway and wifi access point. Because of server part of its configuration i ...
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581 views

BOOTP packets blocked while DHCP packkets are accepted

We have an IP system that makes use of BOOTP for updating our embedded devices over IP. The main app uses DHCP for its IP configuration. Our devices are usually on the network of the customer, the ...
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3answers
4k views

Arch Linux Install Cannot Enable dhcpd

I am trying to setup internet with arch linux. I just installed it using parallels and got the following error: [root@singularity ~]# systemctl enable dhcpd.service Failed to issue method call: No ...
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489 views

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
83 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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1answer
1k 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
2k 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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113 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
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From my 192.168 box, how do I find 10.0 virtual machine on the same box?

I am running Ubuntu 12.04 and VirtualBox 4.1.12. I have created a Debian server under VirtualBox. For reasons I don't understand, DHCP grants my Ubuntu box 192.168.20.50 and my Debian VM 10.0.2.15. ...
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2answers
4k 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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35 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
96 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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139 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
157 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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368 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
794 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
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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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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
1k 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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2answers
34 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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2answers
674 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
26 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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2answers
3k 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
77 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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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 ...
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2answers
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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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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
261 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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393 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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1answer
70 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
754 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 ...