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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8answers
10k views

How can I change my public IP address?

I'm looking for a way to change my public IP address. You know, the one that other websites see. I know what I'm looking for is basically a proxy server, but I don't want to use a proxy for 2 ...
4
votes
3answers
18k views

How to assign multiple IP addresses to a single computer?

The dhcp ip range is 192.168.0.255/24. I wanted my computer to get multiple ip addresses from this dhcp. So I can have multiple connections through different ip addresses with just a single computer! ...
4
votes
1answer
7k views

Does the DHCP server know about static IP addresses?

I have a simple setup up at home with a vendor provided ADSL router and a few home devices I connect to it to connect to the outside world. I would like one of my devices to have a static internal IP ...
4
votes
2answers
11k views

Possible to ipconfig release/renew for only one nic?

I've got two NICs in my Windows 8 Pro (x64) box each connected to different networks. I would like to release and renew the DHCP lease for just one of the NICs. So far I can't find any way to do it ...
4
votes
3answers
6k views

Network is not connecting after startup automatically in Windows

After some perturbations with network drivers now I have a situation where the network is not connecting automatically after the boot-up. It indicates, that the connection is limited or no ...
4
votes
4answers
40k views

Can I Chain Two Routers Together Keeping DHCP on Both?

I have read that I can connect a second router by turning off DHCP and NAT, but I want the second router to assign DNS (I'm using it as an access point for my kids, and will use OpenDNS family service ...
4
votes
3answers
7k 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. ...
4
votes
2answers
11k views

DHCP table in Debian

How to view all assigned ip addresses on a Debian DHCP server? It is usually easy to do on a standalone router through a web interface. How to do it with dhcpd in Debian?
4
votes
6answers
2k views

user friendly name for ip address on home network

How can I set up some sort of local DNS service, so that instead of using ipaddresses to do things like VNC and remote desktop a more URL like thing can be used. All the devices on a network have a ...
4
votes
1answer
6k views

DHCPv6 server + client on Linux

Which IPv6 capable DHCP server and client is best to use on Ubuntu? I can't find a good HOWTO. ISC DHCP?
4
votes
2answers
41k views

Wrong IP address when pinged from another machine?

I recently got a new computer at work and I'm having trouble connecting to it from other computers. I can access other computers from it, just not the other way around. I checked all the usual ...
4
votes
5answers
2k views

security webcam, but NATted dhcp ip address

I would like to install a webcam (better if an independent ethernet based object) at home, and access it from outside while I'm abroad, so I can check if there's mail. However, my internet connection ...
4
votes
1answer
35 views

Browser autostarts when ethernet is connected. How?

I plugged my Windows 10 laptop into a router from our new isp. We only got the fibre, no services set up yet (The fibre can carry phones, tv and internet) Immediately when I plugged the cable in, the ...
4
votes
2answers
246 views

dhclient unicast DHCPREQUEST excessive logs

I am using centos 7 with dhclient 4.2.5: $ uname -a Linux hostname 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6 11:36:42 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux $ dhclient -V Internet Systems Consortium ...
4
votes
3answers
552 views

Windows 10 Limited wireless connectivity

I updated my lenovo E535 to Windows 10. I have following problem with the wireless connectivity. It seems that even if I connect to the AP the IP address is not assigned using DHCP. Even if I assign ...
4
votes
3answers
7k views

How could I fix “No subnet declaration for restart (0.0.0.0)”?

I have a DHCP service installed on my distribution, Backtrack 5 R2 (ubuntu 10.04) and it was working fine, but when I began to configure DNS it suddenly stoped working, how can I make it work again?? ...
4
votes
2answers
8k views

Ubuntu box keeps dropping wired network connection

good morning all. Odd one for you... I have an Ubuntu box, 11.04 x64, running on a Dual Opteron SFF box (iWill ZMaxDP... pretty old machine). Up until a few weeks ago, it was acting as a Windows ...
4
votes
1answer
2k 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 ...
4
votes
3answers
1k views

Raspberry pi has both static and dhcp ip address

I got a Raspberry Pi running Raspbian, connected via Ethernet on my home LAN (on the ISP's default router). The router is configured to give addresses from 192.168.0.10 onwards with dhcp. I wanted to ...
4
votes
2answers
1k views

In Windows 8, How do I make a static IP for each network?

I would like to have it so that my computer sets its IP address statically depending on which network that it is connected to. I have 3 Networks that I regularly use and it seems that with Windows I ...
4
votes
1answer
10k views

Arch Linux: eth0 no carrier - network fails at boot

The problem My computer is connected to a network where dhcp is required. So my network configuration in /etc/rc.conf looks like interface=eth0 address= netmask= broadcast= gateway= My deamons are ...
4
votes
2answers
759 views

how to broadcast a PXE server like Trinity Rescue Kit

I would like to set up a portable PXE server for diagnostic purposes. The issue is that I won't always have access to the DHCP server, or the router itself (sometimes a home router) doesn't have an ...
4
votes
2answers
16k views

How do I open the dhcp-client log on Windows 7?

Tried searching the web for answers but my google voodoo isn't strong enough.
4
votes
1answer
2k views

Configuring default gateway returned by dhcp server

I have a machine which connects via ethernet to a private LAN, and wireless to a network which provides internet connectivity. The private LAN uses a wireless router to perform DHCP. The problem is ...
3
votes
3answers
2k views

Can DHCP provide DNS addresses when IP is static?

In Windows, when I select static IP (instead of DHCP-assigned one) I have to enter the IP address for DNS servers. Is there a way to manually set IP address yet obtain the DNS addresses from the DHCP ...
3
votes
3answers
6k 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 ...
3
votes
3answers
20k views

My first home network setup with a wireless router and switch

I just got a Linksys SRW224G4 switch (24 10/100, 4 10/100/1000) I already have a Linksys WRT54GS router. (I know it's old, but it works) My problem is that well, I have no idea what I'm doing. I ...
3
votes
2answers
1k views

What are ping packets made of?

What exactly are in the packets that are sent via the ping command? I was reading a Wikipedia article about magic numbers and saw this: DHCP packets use a "magic cookie" value of '63 82 53 63' ...
3
votes
3answers
144 views

If I have two routers, how do computers choose which to use?

We have two ISPs at home, and I've connected a different router to each and both routers into our LAN, one large ethernet switch that everything connects to. One router has the IP 192.168.1.1 and ...
3
votes
1answer
16k views

Using Macbook pro ethernet as a DHCP server

I'm developing an arduino project with an Ethernet shield. In order to simulate that the arduino is connected to a router i simply want to make the Macbook act as a DHCP server and give the IP to the ...
3
votes
2answers
26k views

Pinging own machine returns an IPv6 address instead of IPv4

When I ping my own machine I get an IPv6 address: Reply from fe80::1004:p8f0:9e40:a42c%10: time<1ms Reply from fe80::1004:p8f0:9e40:a42c%10: time<1ms I used to get the IPv4 address (eg. 192....
3
votes
1answer
575 views

NIC card using strange IP address

I'm using Windows Vista on a laptop, and while my wireless card works fine and takes the address the wireless router's DHCP server gives it, for some reason when I plug my (built-in) laptop NIC port ...
3
votes
2answers
417 views

After assigning public IP address using DHCP, whatsmyip shows expected 193.x.x.x but ifconfig shows 169.254.x.x link-local address

The computer in question has a Linux SO and is connected to a local network that has DHCP service active. I configured a public ip address to be given to that computer by the DHCP and I can ssh into ...
3
votes
2answers
8k views

Change default DNS server in Arch Linux

I'm in Viet Nam and most social websites (Facebook, Twitter and the likes - even reddit) are blocked by the ISP DNS server. I tried to change the DNS server of my Arch box using the resolv.conf file, ...
3
votes
1answer
604 views

OS X location aware networking

I have a macbook running OS X 10.6.2. I would like to be able to use DHCP when roaming, but automatically switch to a static IP when my macbook is in range of my home router. Right now I must manually ...
3
votes
2answers
1k 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 ...
3
votes
1answer
11k views

Find out dhcp assigned gateway and dns settings in Linux (CentOS)

How to find the gateway and DNS IPs in a DHCP configured network in CentOS? I'm using CentOS installed in vmware using NAT connection and I want to make the ip static.
3
votes
1answer
49 views

Proper way to connect access point to a router (both potentially using DHCP)?

So this is baffling to me for some reason, and I'm sure the solution is quite simple. I have these three devices that make up my current home network: Arris SB6183 Cable Modem D-Link DIR-879 Router ...
3
votes
2answers
1k views

No route to host after changing interface to static ip

I installed a Linux (Ubuntu) server inside my home LAN, initially it's automatically configured to use DHCP interface. I'm connecting to this server from another computer using that server's hostname. ...
3
votes
2answers
4k views

dhclient configures /etc/resolv.conf with invalid entry

I'm trying to figure out why running dhclient on my interface sets /etc/resolv conf to the ip number of my gateway(router). This entry is invalid and each and every time causes inability to resolve ...
3
votes
2answers
666 views

How does DHCP distribute or choose which IP to give within the scope?

There is something strange happening with my OpenWrt firmware. The scope for my DHCP is 100 to 250 in the 192.168.1.* range but the first IP it gave is 192.168.1.189. Is there any reason it started ...
3
votes
4answers
11k views

Netgear router/powerline adapter assigning wrong IP address via DHCP

I've got a problem with my router and powerline adapter, for some reason my router and powerline adapter assign odd IP addresses to me network devices, but not all of them and not all the time:/ You ...
3
votes
1answer
7k 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 auto-...
3
votes
2answers
9k 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 ...
3
votes
2answers
203 views

What type of router (non wifi) for DHCP assignment?

So I have a pretty large house that use to be connected to a business network that had a DHCP server. However we've disconnected that business network and put in residential internet so I need a new ...
3
votes
2answers
237 views

DHCP: Replacing one IP with another

I started having some network problems today and was about to throw in the towel and start finding replacement hardware when I shut the machine down and notices the ping window I left open to the ...
3
votes
1answer
4k views

How can i assign multiple IP addresses to an NIC (possibly software solution)?

I am connected to a network that assigns my IP address via DHCP, but i also need to assign my NIC an IP address that is not in the network's address range. Is this possible, maybe with some "virtual ...
3
votes
2answers
2k views

Setting up DHCP and NAT on apple extreme with Virgin Media SH (APPLE)

I'm currently going mad trying to get my Apple Time Machine to be the DHCP and NAT Server. I've turned off DHCP in the Super Hub config and turned DHCP and NAT on in the Time Machine. Doing this, I ...
3
votes
2answers
455 views

Specific ip settings for different wifi access points

I have a situation where I want to connect a tablet to two different networks, not simultaneously but switching from one to the other (and at different locations). The tablet is running on Windows 8.1....
3
votes
1answer
780 views

ZyWall USG 200 assigning many IPs to one device

Running a network behind a ZyWall USG 200. Our subnet has around 100-110 devices connected at any particular time. Recently some users were having trouble with getting a DHCP address (keep getting ...