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Questions tagged [dhcp]

DHCP stands for Dynamic Host Configuration Protocol and is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol.

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 manual setup by a network administrator.

The implementation of DHCP relies on a DHCP server to hand out network configuration information to DHCP-capable clients that request an IP address (and other information required or useful in communicating with other devices on an IP network). In addition to an IP address, common configuration information served over DHCP includes a default gateway, subnet mask and DNS sever(s), though there are many more possible configurations that can be sent out using the DHCP protocol.

More in-depth detail on DHCP and its implementation can be found at Wikipedia.

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Multiple SSL services using single IP address or multiple DHCP on single interface

So, in the world of SSL/https you can just bind a new static public IP address to the firewall internet interface and use one SSL service (like an https://site, Outlook Anywhere or something like RDP over RCP over HTTPS) per public IP address - as…
Oskar Duveborn
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DHCP duplicate scope

I have the same DHCP scope exist in two domains. Both contain leases of client PCs. I want to have only one of the Domains will be going. In some cases the same IP address exists in both scopes. in others the IP address may exist in one scope or the…
SwitchArt
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Having issues with DHCP classes

I'm having issues with DHCP classes matching mac addresses. We have a lot of one type of machine and I want to get the IPMI cards in the same pool. I've tried the following; class "IPMI" { match if (substring(hardware, 0, 3) = 0c:c4:7a); } subnet…
user1910748
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Windows Server 2012 | Cannot connect | Network settings need to be reset

I currently rent out a Windows Server 2012 dedicated server off shore. I was trying to configure an additional IP address for my server so i was went to network sharing and adapter settings. From there i went into the properties for "Ethernet" so…
Jimmy
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Multiple DHCP on the network

I work in a company where two companies are under one network. They use same subnet. (We have 50 clients (pc) - 4 servers - total for both companies) Both companies have own server for domain controller, each company have own employees. I was…
user3651819
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DHCP (dnsmasq) assigns wrong IP (after openSUSE upgrade)

Setup: I have two servers A and B. Server A runs dnsmasq and should assign a static IP to B (using hostname "vm03"). This IP is set in /etc/dnsmasq.conf (extract…
Philip Allgaier
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How can i set rules on a NW interface to drop all DHCP/BOOTP messages

I have an openstack environment with a provider network scenario implemented using openvswitch. My openstack is installed on allinone node setup. Is there a way that i can disable/drop all DHCP requests that lands on oen of the network interfaces…
Gaurav Parashar
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I'm trying to ascertain how is my Networkmanager receives specific name server information- possibly Cobbler related

When I: cat /etc/resolve.conf I see: # Generated by NetworkManager nameserver 10.100.48.19 nameserver 10.100.48.17 When I change this info then reboot, the original information returns. I'm trying to work out where these specific addresses are…
treetop
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Which options are required to send a PAC file URL via DHCP to Android devices?

I would like the Android devices which connect to WiFi networks to be automatically configured to proxy their HTTP(S) traffic through a web proxy. There is a PAC file available though an URL, which points to a squid proxy. The PAC URL manually…
WoJ
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Debian BeagleBone Black inaccessible via SSH/ping over ethernet

Somewhat related to this question. I have a BeagleBone Black running Debian and am trying to use its ethernet port for internet (rather than USB sharing as is typical when getting it up and running). However, I can't seem to get it to connect to…
erik
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"100.x.x.x" IP Showing in DNS

In our Windows environment, our clients register their own DNS. We have local Windows DNS servers and a firewall that assigns a separate range for VPN connections. Recently we have seen one of our machines register two listings in DNS - one in the…
Matt8
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Selectively routing traffic on a single physical netork to two DHCP servers

I have 20 physical stations w/ 5 network drops at each station. All are connected via cascading switches to a central switch. On the switch are: an ASUS RT-N66U (semi)intelligent router with the embedded DHCP server handing out addresses to PC's at…
BlaineM
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DHCP renew fail - internet drops every 2 hours

Every 2nd hour all workstations lose internet connection for 10 seconds. The ISP tech support seems to be reluctant to resolve the issue so I am trying to fix it myself. Here is a diagram of our network: I wrote a shell script to log the dropouts.…
gipadm
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How to show dhcp server's ip address for every VLAN on cisco switch?

Is there a way on Cisco layer 3 switches to show the DHCP server's IP address for every VLAN?
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Solving DHCP Scope exhaustion - multiple /24 subnets or a single /23 subnet?

We have a client with a remote site with a 10.0.9.0/24 network. The DHCP scope on this network is nearly exhausted, with only about 20 addresses available. We could possibly increase this to 30 by re-IPing some static devices and shrinking our…
Thomas
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