The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol. DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for setup by a network ...
1
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2answers
37 views
Static IP but DNS server from DHCP (Can't use a reservation)
I need to assign the DNS servers to a Virtual Machine via DHCP, but I want the machine to have a static IP address.
I cannot use a reservation and go through the usual DHCP process because the VM gets ...
0
votes
0answers
23 views
NAT on MAC-filtered network [migrated]
My ISP (Hyperion S.A.) provides internet using a UTP cable with MAC filtering. I'm trying to set up a router so that I can connect multiple computers to the network. Most computers would connect ...
0
votes
1answer
33 views
Can dedicated DHCP server assign a default gateway address to router?
I have built a very simple LAN in Packet Tracer: a PC, a dedicated DHCP server, a switch and a router.
http://i.stack.imgur.com/Zvx3X.jpg - here is this LAN
The router is meant to be a default ...
0
votes
0answers
31 views
Overriding DHCP scope option a single IP address reservation
Is it possible to override (or disable) scope option which adds entries to routing table of DHCP clients (option 121) for a single address reservation on Windows Server 2008 DHCP?
1
vote
3answers
59 views
SLAAC and DNS, no really - what's the deal?
So I know that there are extensions to SLAAC in the works to enable DNS discovery via RAs (RFC 6106). But what was the original intent? How did the IPv6 designers envision things working without ...
0
votes
1answer
17 views
DHCPd and DHCPc on different UDP port?
Is it possible to create a run another custom dhcp service on different UDP port.
For example port 70 and 71?
Therefore all my clients pre-configured to accept this instruction and if fails fall ...
6
votes
2answers
121 views
Sending DHCP specific vendor options to a Windows server
My goal is send some information (url and a one-time token) to a windows machine. It's working fine for GNU/Linux servers because I get the information from /var/lib/dhcp/dhcp.lease or similar. This ...
2
votes
1answer
59 views
DHCP: One NIC and multiple subnets
I'm setting up a Debian to work as a gateway for a small office network. I need to have three subnetworks for different areas within the company and I will define which PCs will get what IP based on ...
0
votes
2answers
44 views
How to treat a request in DHCP from an unknown host?
I have quite few dhcp request from unlocated hosts, like:
dhcpd: DHCPDISCOVER from 00:25:90:54:91:b7 via eth0: network eth0: no free leases
Whats the best way to locate the host querying the dhcp?
...
1
vote
2answers
91 views
DHCPD on FreeNAS?
I've got a FreeNAS install I've been using for a while, and wanted to set it up to serve as a network boot server. I downloaded and installed the isc-dhcpd-server, configured the tftp+iscsi+etc ...
0
votes
1answer
20 views
RedHat RHEL5.3 update DNS entry point of Windows 2003 domain on Debian style
I'm back today, because I can't do a trick that is simple to do on Debian.
Indeed, I'm using a RHEL 5.3 server as a DHCP client on Windows Domain.
To be able to correctly reach it form my windows ...
1
vote
2answers
86 views
Configure dhcp client to connect to the right subnet
Sorry if this sounds a bit muddled; I am fairly new to networking. My goal is to have two or more subnets on one network. When I add a new server to the network (a virtual machine), I want to be able ...
2
votes
1answer
61 views
Change pointer to IP address of PXE server WDS
The company I'm working for bought another company that's got its own domain. We've connected these together and noticed that both domains have got their own WDS server.
Let's call our primary WDS ...
0
votes
0answers
28 views
Ubuntu, my dhclient lease time is way short
I am having an issue with the lease time of my eth1 interface. A windows machine on the same network get a lease time of 5 days, while my ubuntu box switches between two ips with intervals of around ...
1
vote
1answer
58 views
Does my small network need a domain name?
My question is simple: does a small network need a domain name or do I just leave it empty?
Here is the information on what is happening:
I have a small network (30+ machines) that includes windows, ...
0
votes
2answers
42 views
Forward DHCP assignment to my ISP rather than have router's DHCP server assign IPs [closed]
Okay, I don't know if this is possible, but I was wondering if it were possible to turn of the DHCP server in my router and have my ISP assign global IP addresses to all the devices on my network.
0
votes
1answer
69 views
VM can't ping localhost on ESXi 4
I have some problem, i have 3 VM (vm1, vm2, and vm3).
vm1 is normal. ping to internal and external is OK, DHCP is OK.
but vm2 and vm3 very strange. DHCP is OK but can't ping to internal and external.
...
3
votes
1answer
90 views
DNS Record Timestamps Are Not Updating on Server 2008 R2 DNS Server
I have 2 Server 2008 R2 domain controllers with a AD integrated DNS zone for the domain. Previously, scavenging was not enabled. I enabled scavenging a week ago and now that I am seeing old stale ...
-5
votes
8answers
144 views
setup rogue DHCP when using PXE boot
Recently I want to setup PXE boot server (i.e. DHCP server + TFTP server + syslinux software) for my company network in a LAN. I have read the setup details at here: ...
0
votes
0answers
37 views
ISC-DHCPD failover, Modifying host definitions via OMAPI
Background: I'm working on replacing my single DHCP server with 2 in a failover configuration. When I do a DHCP request I see the lease is created in both dhcpd.leases files on each server. However, I ...
0
votes
0answers
27 views
Broadcast packet routing on Windows 7 to VirtualBox VMs?
I have VirtualBox 4.1.14 on a Windows 7 machine, running a VM with Linux 2.6.26 installed. The network connection is bridged, and I am able to connect across the bridge in both directions, so it ...
3
votes
3answers
105 views
Requesting >1 IP addresses via DHCP
I'm wondering whether it is possible to configure a Windows 7 machine to request more than 1 IP address?
I'm doing some testing and it would be useful to have 2 local IP addresses however, the ...
0
votes
1answer
89 views
Reserving IP Addresses scope from DHCP without having MAC addresses
I don't know if it belongs on serverfault or stackoverflow so you can move it if nessecary.
I am wondering if it's possible to reserve a group of IP addresses from DHCP without providing MAC ...
0
votes
0answers
40 views
arp -a only showing router
When I run
arp -a
It only displays the router IP and MAC address. Is there any way to get the IP addresses of all of the machines on the network using arp or would I need to use another tool like ...
0
votes
0answers
50 views
How Do I Create A Subscription WiFi Network (like Starbucks) [closed]
When using an iPad, connecting at a Starbucks, you will see a page pop up (like a web browser, but with no address bar), and it will allow you to login.
Apple has a KB article on them at:
...
0
votes
1answer
73 views
Static IP, but DNS and other settings from DHCP [closed]
The IT guy gave me an IP address outside of the DHCP dynamic pool range (I do not have a DHCP reservation). I'd like to set linux client's IP staticly, but still have it pull the DNS servers and ...
1
vote
0answers
52 views
Can multiple VLANs be provided with multicast addresses by a single MADCAP server?
Can a single DHCP server provide dynamic multicast addresses for hosts in many VLANs using MADCAP, just like it can provide hosts with unicast addresses via ip-helper? Or from a Cisco perspective, ...
0
votes
1answer
141 views
Query a Windows DHCP server : find MAC from hostname
From my computer, I want to query my DHCP server to find a specific mac adress.
I want to enter the hostname to search, and getting back the Mac address.
Something like :
netsh dhcp server scope ...
3
votes
2answers
85 views
Disabling Netbios over TCP/IP via DHCP does not work
I'm working towards disabling Netbios over TCP/IP for my organization. I've created a reservation for my MAC address. I can see that the reservation becomes active when I renew my IP address. I set ...
1
vote
2answers
55 views
dhclient requests filling memory?
Dammit Jim, I'm a web developer, not a sys admin.
With that out of the way, my client's has a CentOS server (6.2) that is only serving a single Magento site (and the associated MySQL server) and it ...
3
votes
2answers
144 views
Basic networking: Centos Server Router + Ubuntu Client setup.. unable to access outside world from client
I am trying to set up my Centos Server with two NICs as a router. eth0 is connected to the outside world and eth1 is connected to an Ubuntu client.
Here's eth0 on the server:
DEVICE=eth0
...
2
votes
1answer
71 views
DNS Server address configured inside Router not working
Well, I have an ISP router in which I have configured DNS Servers to use (Primary & Secondary) like Google DNS. It works just fine.
But now I have setup a computer with DNS server (Simple DNS ...
0
votes
1answer
33 views
Accessing IPv6 router interface from a minimal Fedora installation?
I've recently installed Fedora 16 and am trying to set up a simple apache server. The only problem I've run into so far is that I'm unable to access my router's web interface from any box on my ...
0
votes
1answer
85 views
Multiple dns suffix/search base on Windows DHCP
I am trying to find out how can I give out more than one DNS suffix on a DC with the Windows DHCP server.
Is it possible somehow? (Win 2K8 with XP, Win7 and Linux clients)
3
votes
1answer
66 views
NAT box load-balancing with iptables and 4 DHCP uplinks
I am trying to configure a router which provides Internet to a couple hundred users. This router has 4 basic cable uplinks at its disposition, which all use DHCP and have a capacity of around 10/1 ...
1
vote
1answer
95 views
Fixed and dynamic IPs in ISC DHPD lead to double lease
I would like to have a small dynamic adress part and the most clients are assigned a fixed IP adress.
My dhcpd.conf looks like this:
use-host-decl-names on;
authoritative;
allow client-updates;
...
1
vote
1answer
85 views
How to clean up IP's and prevent “ghost hosts” from claiming their IP address?
Background
We have about 500 public IP addresses and is about to run dry. Most of the hosts are configured to get the IP from DHCP.
But there some that was configured with static IP.
The problem
...
1
vote
2answers
127 views
Web interface for managing an ISC DHCP server
I am looking for a web interface to administer an ISC DHCP server. I have the setup of one Debian Linux box running an ISC DHCP server and I would like to add a second DHCP server as failover.
To ...
2
votes
1answer
86 views
Windows 7 routing traffic through the gateway for local addresses
Windows is adding a route for a local address (10.0.0.90 - my fileserver) with a gateway of (10.0.0.138 - this is my gateway), the gateway only has a 100Mbs link so all of my fileserver bound traffic ...
0
votes
2answers
135 views
Internet slowed down because of SQUID Server setup
Recently I have setup a squid server for our office.
I have computer (A) with
two ethernet cards, one for internet and the second one for local networkIt has Ubuntu server OS with squid-server and ...
2
votes
2answers
79 views
Laptop being assigned IPv4 address out of router's DHCP range
I have a laptop connecting wirelessly to an E4200 Linksys router. The router is configured to use DHCP with a range from #.#.#.100 to #.#.#.254. However, the laptop is being assigned an IP address of ...
0
votes
1answer
74 views
How to fix error with “class” when creating a dhcp split-scope on Windows 2008?
I'm trying to split a dhcp scope between a existing domain controller TTP01 and the new DC TTP02 to provide failover.
I'm using the the wizard in DHCP > [my scope] > Advanced > Split-scope.
In the ...
2
votes
2answers
66 views
Multiple DHCP servers available to virtual networks in VMware - how to set priority?
In a VMware ESXi 4.1 lab environment*, I have a pair of virtual networks configured (10.0.4.x and 10.0.10.x).
On both networks is a DHCP server.
The problem is that the networks are routable to each ...
0
votes
3answers
103 views
How to prevent MAC spoofing
I have configured a DHCP server on Ubuntu and a fixed IP address for a specific mac, like this:
host client1 {
hardware ethernet E0:69:95:73:2C:66;
fixed-address 192.168.0.10;
}
If anyone ...
1
vote
0answers
63 views
Multiple NICs config, disconnecting eth0 disconnects all other interfaces
Good Day,
I'm using hardware that streams data, it has 4 Lan ports and is running Linux 2.6.23.
I've run into some strange behavior with ARP tables reporting multiple IP addresses to single MAC ...
0
votes
1answer
64 views
Need to have clients boot via tftp without mac address
My goal: have a server (debian) on a private lan that provides tftp booting to any client machines plugged into the switch that the server is connected to - the server doesn't need outside Internet ...
0
votes
1answer
54 views
How to to specify network address for a dhcp client
I have setup and configured a DHCP server on a sparc running Solaris 10. Now I want to test the DHCP server by creating a DHCP client on another computer running Solaris 11.
I would like to know, how ...
1
vote
2answers
75 views
Windows 2008 R2 - Restrict installation of “DHCP Server Role”
I've got a bunch of machines running in a sensitive network environment. I'm worried that one of the users might install the DHCP Server Role on one of the machines in the network and hose the ...
0
votes
1answer
84 views
server 2008 R2 and asa5505. DHCP through DMZ
I'm trying to configure our network to separate it through DMZ.
Basically allowing full access from each network to the servers but blocking access from these networks communicating with each ...
0
votes
2answers
79 views
dhcp relay through VPN
I am doing a school project. There are 3 sites wich are connected trough vpn, i have my server infrastructure at the head office. Which would be the best option; have a seperate dhcp server at each ...
