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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4
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8answers
9k 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
2answers
8k 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
5k 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
3answers
6k 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
9k 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
5k 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
34k 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
2answers
77 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
423 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
2answers
4k 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 ...
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
3answers
7k 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
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 ...
4
votes
1answer
9k 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
719 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
14k 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 ...
4
votes
1answer
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 ...
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
18k 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
2answers
323 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
4answers
31k 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 ...
3
votes
2answers
7k 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
600 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
902 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
3k 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
4answers
10k 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
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 ...
3
votes
1answer
6k 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 ...
3
votes
2answers
198 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
1k 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
394 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 ...
3
votes
1answer
663 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 ...
3
votes
3answers
11k views

What happens when router has been set to incorrect time?

I have a D-Link router for my home Wi-Fi network. Everyday at least once the internet suddenly goes down. I am simply not able to connect to the Wi-Fi network. If I just restart the router, it starts ...
3
votes
1answer
378 views

Is an RDNSS or DHCPv6 server allowed to distribute a link-local IP address as DNS server?

And if so, how is this supposed to work? Is the client supposed to attach the interface identifier himself, based on the interface the assignment came through?
3
votes
2answers
1k views

“Network Scan” gives “DHCPServer FAILED”, but it's checking the wrong address

When I do a "Windows Help and Support Center" "Network Scan" on my XP SP3 machine, it tests a very long list of various things. All are marked "OK" except: > DHCPServer 192.168.0.1 (FAILED) > ...
3
votes
2answers
154 views

home network question regarding dhcp

My home network consists of a cable modem provided by the ISP, which is connected to a switch, from the switch 1 cable runs to the digital tv decoder/recorder also provided by my ISP and another cable ...
3
votes
1answer
602 views

Disabled DHCP server on secondary routers, cannot access setup page anymore on those

I have the following network configuration in my home: The Telsey DSL modem+router is provided by my ISP and setup configuration page is password protected from them (not default one, I tried brute ...
3
votes
2answers
10k views

How can I override comcast's wonky DNS settings in the router resolv.conf?

Whenever I connect my laptop to my Xfinity router (TC8305C), it writes wonky settings into my resolv.conf. Rather than completely hard-codinging the settings on my laptop, can I override the settings ...
3
votes
1answer
1k 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 ...
3
votes
2answers
7k views

Will disabling NAT on my wireless router cause a performance hit on my DSL router?

I have a Thomson TG508v2 router/modem and a brand new AirPort Extreme connected to it. At first, I set the AirPort Extreme to "share a public IP", which enables DHCP/NAT. Everything works great but I ...
3
votes
2answers
558 views

MacBook Pro not obtaining IP address after replacing logic board

I just got my MacBook Pro back today from having the logic board replaced. While in the Apple store the Internet worked ok. I got home and it was able to connect to my WiFi, but could not obtain an ...
3
votes
4answers
3k views

Static IP in LAN with DNS name

I have a LAN at home sitting behind the router (Linksys WRT54G). The IP addresses assigned to the Linux boxes are 192.168.0.101 192.168.0.102 192.168.0.103 The Router is also connected to the ...
3
votes
1answer
849 views

Windows Server 2008 is not showing DHCP-Server configuration in Server-Manager

I've successfully installed the DHCP server role on my Windows Server 2008 R2. After configuring everything, DHCP is working just fine. I can configure the DHCP server via Start -> Programs -> ...
3
votes
3answers
4k views

LinkSys router suddenly cannot get an IP address

I have a linksys router WRT54G2 connected to a cable broadband. Just last week, everything was working perfectly - I would be able to connect my laptop to the internet using WiFi. However, starting ...
3
votes
2answers
711 views

How to set up DHCP-configured access through a Linux box?

I would like an old desktop box to use my laptop as a router to access the internet. Here is my setup: I have one ethernet port in the side of my laptop which I want to use to get internet access ...