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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1answer
545 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 ...
2
votes
1answer
2k views

Linux/CentOS how to permanent inititate DHCP Client any reboot?

In my CentOS, i need to run dhclient -v command at every time i start/reboot the server. How to make this permanent please?
2
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3answers
11k views

Why can't my router connect to Internet?

I have UPC internet connection (chello.pl). My router is D-Link DIR-300. When I use provided modem to connect to the internet there is no problem. When I try to do it via router, I can't get a ...
2
votes
3answers
954 views

ad blocking host file, shared to all computers on local network

I currently update my local hosts file with advertising server domain names and direct them to nowhere. Well, almost nowhere. I point them to 127.0.0.1 and I don't have a web service running so it is ...
2
votes
2answers
201 views

Using DHCP manual/auto independantly from DNS manual/auto

I've read several definitions for DHCP and DNS on various sites. They all sound like they are 2 VERY different things. Why does Windows XP's property tab allow/disallow 1... when you allow/disallow ...
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2answers
1k views

How to keep a static network local IP for all the connected machines, and still dynamically assign all the incoming ones?

I have read the manual and could find no word on this, so I'm asking here. I have a couple Macs on a wireless network, this router model: http://homesupport.cisco.com/en-us/wireless/lbc/WRT54GL Now, ...
2
votes
2answers
4k views

How can I get a new IP from DHCP?

I connect to internet via my dorm's ethernet and IP addresses are assigned by DHCP. I tried sudo dhclient -r dhclient but that doesn't work. are there another commands i can issue? p.s: I don't ...
2
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3answers
434 views

My Very Own DHCP Server

My home network is as follows: Cable modem for internet, connected to a wireless router, multiple clients connected over the wireless network. My wireless router has a builtin DHCP server that assigns ...
2
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5answers
12k views

Setup Linksys WRT54G to use modem`s DHCP server

i cant figure out how to set Linksys WRT54G Wireless Router to use modem`s DHCP server. My network scheme is like this: [COMCAST MODEM] <=> [HUB] | | [LINKSYS] ...
2
votes
1answer
465 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 ...
2
votes
2answers
2k views

How to get both IPv4 and IPv6 dynamic address

Running dhclient gets me an IPv4 address. Running dhclient -6 gets me an IPv6 address. And the man page says you can't combine v4 and v6. So how to get both v4 and v6 addresses at the same time?
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votes
2answers
104 views

Reserve DHCP slots for certian users?

My company has alot of outside suppliers and contractors who need access to our wifi network. Currently, we only allow DHCP to hand out 20 addresses for our quest Wifi network. This typically fill up ...
2
votes
1answer
2k views

Default to Static IP when no DHCP is found

I've setup a DHCP server on one of my centos boxes, and I have several computers that are going to connect (also centos) and hopefully make use of the DHCP. On start-up I'd like to check whether a ...
2
votes
2answers
366 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 ...
2
votes
1answer
1k views

Switch between DHCP and static IP

My laptop needs to use DHCP at home and a static IP at work. As far as I can tell, there's no way to flip between one and the other quickly - I'll have to manually configure the network connection ...
2
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2answers
744 views

Does it make sense having a separate DHCP server

I used to use Amahi, and Amahi by default has a built-in DHCP and DNS servers switched on. Now, I removed Amahi, and am assembling my own home server using Ubuntu server. My setup: an ADSL modem / ...
2
votes
4answers
2k views

Linux - use dhcp again to get IP

I had statically set my ip in Linux using: sudo ifconfig eth0 192.168.blah.blah Now I want it to go back to using DHCP to assign the IP. How do I do that? This is what I see when I run dhclient ...
2
votes
3answers
132 views

Does exists a software that act as DHCP service?

I need to configure a network made by a simple old hub with 24-ports a server and some clients. Both clients and server has Windows XP or later. If all clients has the DCHP service enabled does ...
2
votes
4answers
258 views

How to reach my router's configuration page?

I've set up a router in my room (It's a TP-LINK W8980). I'm inside a college room, so I connected the WAN to the ethernet ports of my room, and the router is creating a wifi network. It's using PPPoE ...
2
votes
2answers
434 views

Cannot reach the computer in WAN

I wanted to split the internet connection in my room. And my brother also wanted a better wifi accessability. So we bought a router (NETGEAR JWNR2010v5). All we wanted works great, good wifi. I have ...
2
votes
1answer
485 views

Can a broken ethernet cable give link but no ip?

I'm just wondering what the structure is here. Can an ethernet cable give link and seemingly work fine, but cause problems with DHCP traffic between two nodes? One part of me is thinking that link ...
2
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2answers
1k views

Using multiple interfaces on a RHEL5.5 x64 machine

I am trying to use a statically-assigned address on one interface (eth1) of a server and have a dhcp-assigned address on another interface (eth2) on the same subnet (172.17.11.0/24). When I setup a ...
2
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2answers
3k views

DHCP IP address have access to the internet but static IP address don't behind a router

I have three PCs 192.168.1.100 (DHCP) 192.168.1.101 (DHCP) 192.168.1.113 (Static) One router (SMC SMC8014WN) 192.168.1.1 The .100 and .101 both have access to the internet. The .113 does ...
2
votes
1answer
322 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?
2
votes
1answer
627 views

Router issues IP but Laptop does not accept?

I was having issues with my older Linksys wireless router and decided to upgrade to a Linksys E3000. However, after upgrading, I still have the same issues. What happens is that I will be connected ...
2
votes
2answers
389 views

Connect to host by name using a Linksys wrt54g as my router and dhcp server

I have a Linksys WRT54G router at my house. How do I enable/perform connect-by-name on my network (like "kitchen" and "musicbox") on Windows XP, Linux (Ubuntu and CentOS), and Mac clients? Sometimes ...
2
votes
1answer
23 views

On boot, how can I switch to a static IP based on a gateway IP provided by DHCP?

I have a "headless" *NIX host -- let's call it 'foo' -- that is to be accessible via SSH and VNC-tunneled-over-SSH on an arbitrary 192.168.x.y/24 private LAN. Sometimes, I want to physically move ...
2
votes
3answers
31 views

IP Address conflict in a LAN

How to find if someone has taken a particular IP address in a Local Area Network? Or in a more generalized form, how to find the list of IP address that DHCP has allocated in a Local Area Network?
2
votes
1answer
132 views

Two routers, same network, different SSID and password

I have a question about router configuration that I haven't really found an answer to. What I have: SSID: House A: A ZyXEL DSL-modem (660 Prestige) with built-in WLAN and DHCP-Server. IP: ...
2
votes
2answers
3k 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 ...
2
votes
1answer
98 views

Is it possible to use DHCP to obtain default gateway and DNS server only?

I have a few VMs which I want to keep with static IP addresses. However, I run those on my laptop and frequently connect to different networks which use different default gateway and different DNS ...
2
votes
1answer
4k views

No IP address given to router until after cloning MAC address from another computer

This problem had me occupied most of the day until I finally solved it just a little while ago. Unfortunately I still don't understand why the problem surfaced in the first place or why my final ...
2
votes
2answers
5k views

Can't ping network machines by hostname when behind wireless router on university network (only IP)

I have a TP-LINK wireless router (TL-WR340G) that is connected to my university LAN via an Ethernet cable (which assigns a dynamic IP address to each device connected). My Windows 7 computer is behind ...
2
votes
1answer
326 views

Windows XP Internet Issue

I'm trying to fix a computer running XP for a friend, and it is being a pain. It is on the same wifi as this Mac I'm using to type this. It says it is connected and the signal strength is excellant. ...
2
votes
3answers
2k views

LinkSys wireless router failing DHCP

I have a home network that has an ActionTec Router/DSL Modem plugged into the phone line, with my desktop computer plugged into it. I also have a LinkSys WRT54G2 Wireless-G Broadband Router plugged ...
2
votes
1answer
912 views

Trouble setting up DHCP with WRN2000v2 and GS108 network switch

I have the GS108 Netgear 8 port Gigabit network switch and the WRN2000v2 Netgear wireless router. The problem I am having is that anything conneted through the Gigabit switch is not being assigned an ...
2
votes
1answer
646 views

How to set the hostname according to the DNS name on Ubuntu 9.10?

Motivation I have to manage a lot of virtual machines that I create by copying a template (VmWare image). Problem Now I have the problem that in the template the file /etc/hostname contains a given ...
2
votes
1answer
394 views

How do I add wireless-router to existing VPN-router>DHCP-server network?

Our office just acquired a Cisco/Linksys RVL200 VPN Router for use as our primary router. We handle DHCP serving via dhcpd on a Debian server. I want to enable wireless access to our network. We have ...
2
votes
1answer
100 views

Forward ports to the same computer even when the IP changes due to DHCP with D-link wireless router

I have a PC connected directly to a wireless router D-LINK WBR-1310, and I use port forwarding to that PC so I can connect to it via SSH remotely. However, I use the built in DHCP to manage IP ...
2
votes
5answers
5k views

Windows 7 Default Gateway problem

I have a strange problem (or at least seems strange to me) the below are IP configurations for two laptops on my home network which consists of a main router 192.168.11.1 and a connected wireless ...
2
votes
1answer
55 views

How can the DHCP routers option work if it's my own IP address?

I'm setting up a T-Mobile USB 4G data modem on Ubuntu 14.04 and I'm not making sense of the DHCP lease that T-Mobile gives me. Specifically, the value of the "option routers" is identical to the ...
2
votes
0answers
146 views

How to automate running the dhclient for wwan0?

in Linux Mint 17 I have to run sudo dhclient every time I connect and disconnect to/from the Internet using a mobile broadband dongle, because otherwise the connection is declared active but when I ...
2
votes
0answers
95 views

Removed VirtualBox DHCP still offers addresses. Why? How can I make it stop?

I have VirtualBox installed on a Windows 8 host. I was using the VirtualBox DHCP server for a while, but now I'm trying to switch over to a DHCP server installed on one of the guests. The VirtualBox ...
2
votes
1answer
342 views

Will Windows renew IP address sometime after “ipconfig /release”?

On a Windows 2000 PC, I did a "ipconfig /release" to disconnect it from the network. After about 6 hours, I checked it again and it was still disconnected. But then about 17 hours after that, I ...
2
votes
1answer
705 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 ...
2
votes
1answer
409 views

Windows failing to renew IP lease

Approximately a month ago I started experiencing a minor, but frustrating problem: my internet connection would drop for several seconds every two hours. My quick investigation showed that these ...
2
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1answer
1k views

How to load test a DHCP Server? [closed]

I basically want to test how many client requests my DHCP server can handle.Is there a simulator available to load test a DHCP server running on Ubuntu 12.10?
2
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0answers
278 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 ...
2
votes
1answer
67 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 ...
2
votes
1answer
50 views

DDNS in BIND9 with custom records

I have BIND9 and DHCP configured to communicate with each other for providing DDNS in my network but I need to also setup custom records as some machines need to respond to more than one hostname. ...