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

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2
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2answers
95 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
1k 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
566 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
2answers
3k views

dnsmasq without altering /etc/hosts file manually

I've trying to get dnsmasq working as a combined dns and dhcp server. It's infuriating so far... In short, the DNS works fine for anything added to /etc/hosts, and the dhcp works fine, but the dhcp is ...
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
126 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
2answers
35 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
2k 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 ...
2
votes
1answer
405 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
votes
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
votes
2answers
2k 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
282 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
546 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
354 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
56 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
2answers
4k 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
228 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
1k 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
801 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
637 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
376 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
97 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
4k 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
29 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
73 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
votes
1answer
316 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
votes
0answers
149 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
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 ...
2
votes
1answer
37 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. ...
2
votes
1answer
752 views

Two access points with same SSID, loosing connectivity on mobile devices

I have two access points, with the same SSID, same security mode (WPA/WPA2), operating at different channels (1 and 6). I have set the first of them (192.168.1.1) to operate as a DHCP server, while ...
2
votes
0answers
175 views

Using BT Business Hub 3 with separate DNS server

We have a BT Business Hub 3 in our office to connect to the internet. We are a web development company and we have internal servers in our office that we want to be able to access from mobile phones ...
2
votes
0answers
514 views

WRT54G router with tomato firmware doesn't connect to internet if Windows 8 PC is suspended

This problem began occurring within the past couple of days, and to my knowledge I made no changes to any hardware or to my network layout. I have a Windows 8 PC connected to a gigabit switch (D-Link ...
2
votes
0answers
64 views

Telephone Server, Telephones, Printers, PCs & Servers on Individual VLAN's, DHCP clashing

Stuck at work tonight with a big issue. As a requirement for being taken over by a corporation we have been asked to stop using a firewall (juniper ssg-140) to separate our telephone system from the ...
2
votes
1answer
96 views

Reliable cross-platform way of determining hostname from IP address

Within the DHCP table of a router, clients that have sent their network name are listed with IP and MAC addresses. I need a way to get the host names that clients have sent. The router does not store ...
2
votes
0answers
48 views

Correct usage of Windows Server on network?

I have two routers, one with dhcp turned on and the other with it off. this is a functioning home network. Now, I am trying to integrate into it a windows server. Should the windows server be doing ...
2
votes
1answer
462 views

Failed to connect to server: The requested address is a broadcast address, but the appropriate flag was not set

My server IP address starts with 128.xxx.xxx.xxx and my laptop gets its address as a DHCP and is of the for 10.254.xxx.xxx I configured the server to look for my laptop and when I start the server it ...
2
votes
0answers
2k views

Windows 7 machine not pulling DHCP-issued address

Not sure where to go on this one. netsh winsock reset and netsh int ip reset did not help. If I set a static IP on the machine, it communicates fine. But it won't pull a DHCP address. Here's where ...
2
votes
0answers
147 views

How to only obtain information from DHCP server without applying it on Linux [duplicate]

If I do dhclient eth1, it obtains the information (IP address, router, DNS, etc.) and applies it to routing table, /etc/resolv.conf and so on. How to only get and print the information from DHCP ...
2
votes
2answers
513 views

Laptop kicks other users off the wifi when it connects, then gets disconnected itself

I've got an Acer Aspire One running Linux. When I connect to my building's wifi, everything seems fine for a short period of time (I can google a few things or start downloading an Apt package), but ...
2
votes
1answer
5k views

PC does not get ip address from router using wired connection

I have an ASUS WL-520GU wireless router with four LAN ports. When my laptop is running Windows 7, and I make a wired connection from the laptop to the router, the laptop does not get an IP address. ...
2
votes
1answer
1k views

Two DHCP interfaces asigned to two default gateways to OS

I have a Ubuntu box that has two networking interfaces (eth0 and wlan0). They are both configured for DHCP in /etc/network/interfaces, but they both assign a default gateway: /etc/network/interfaces ...
2
votes
1answer
192 views

Change IP based on AP

I connect to 8 different Access Points, each with a separate subnet and each location does not allow DHCP. I want my computer to change my IP address to an assigned IP address per location based on ...
2
votes
1answer
618 views

dhclient overwriting resolv.conf

I'm setting up virtual dev environments and I want the hostname.domain to be something specific, eg- "barney.local". However my /etc/resolv.conf file keeps getting nuked because i'm using DHCP. I ...
2
votes
0answers
967 views

How do I configure Windows 7 to get its timezone from DHCP?

The DHCP protocol supports setting the time zone and the Windows DHCP Server implements this feature. The time zone on my company laptop (a member of a Windows domain) never changes when I connect to ...
2
votes
3answers
449 views

How do I PXE Boot Only when I want it to without user intervention?

I would like to setup a PXE environment where I can re-image machines remotely without any user intervention. Only problem is when the re-imaging is completed it will do the re-imaging again and again ...
2
votes
2answers
714 views

Ubuntu 8.04 server is not retaining a static IP address

I recently setup a linux box running Ubuntu 8.04 (to match another server with 8.04). I need to insure that this box has a static IP address and I changed /etc/network/interfaces to set up the static ...
2
votes
9answers
19k views

cannot renew ip unable to contact dhcp server

Hey all, I'm trying to switch up a home network from one computer (XP Service Pack 2) directly connected to via a modem to 2 computers (adding a Macbook) connecting through a router. The Macbook is ...
1
vote
3answers
104 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 ...
1
vote
3answers
5k views

dhcp option 252 what is it?

All over the internet I see example of how to set up dhcpd with WAPD proxy auto configuration using DHCP. In the /etc/dhcpd.conf file There are statements like this. option wpad code 252; ...
1
vote
6answers
51k views

How to run a DHCP Server on Windows XP?

How can I create a DHCP server in a Windows XP environment?