Hi,
I have a script that my operators use as a login profile.
As they need to export their display in order to access the GUI of the data protector program in HPUX machine.
Anyone can advise how I can grep (eg. who -r) the dynamically assigned IP address and automatically put it as a variable... (4 Replies)
Hi all,
I have this problem that puzzles me, i have setup all the right DHCP configuration in Windows Server. The reservation IP address in windows for this specific unix terminal. However, when i rebooted the unix terminal the IP which was already assigned for this box somehow change to a total... (0 Replies)
hi
I need a dhcp congfigured to give some of my clients IP regarding their MAC addresses and rest should get any IP from same pool. I am not sure what to add dhcpd.conf to provide such a pool or group or class. I tried with this but seems not good enough.
<<<<dhcpd.conf>>>>
... (2 Replies)
Hello Experts,
I am working on a software that has network client-server architecture. I need to have a mechanism that notifies me upon change of dhcp address change locally or at remote machine. Windows have IP Helper APIs to get address change notification. Is there something similar in Unix?... (3 Replies)
Hi ,
when i configure my server with a fixed ip address in dhcpd.conf as below
subnet 172.21.151.0 netmask 255.255.255.0 {
range 172.21.151.66 172.21.151.66;
}
host switch {
hardware ethernet 00:05:30:02:DB:31;
fixed-address 172.21.151.66;
}
when i start dhcpd server , it... (2 Replies)
we can assign a dynamic and fixed ip address for a dhcp_client through dhcp server ,
if it is dynamic ip address , it would be having lease time and renews after half of the leasetime gets over.
would the same funda applies for fixed ip address to .. i dont think so ... please confirm on the... (3 Replies)
Hi All,
Could you please explain the purpose of assigning the static IP by using the DHCP Concept. Like by using the clients MAC address we assign the static IP Address. Waiting for your reply. Thanks in Advance. (6 Replies)
Hey guys,
I run my raspberry pi with a TP-Link Wlan-USB stick. The stick works out of the box with the pi-modded debian.
But eventhough the automatic connection to one of the saved WLAN-networks in the file /etc/wpa_supplicant/wpa_supplicant.conf works, my PI doesn't request or receive an... (4 Replies)
Hello.
Doing my first steps in Linux and while trying to configure a DHCP server in Linux i encountered some problems:
TOPOLOGY:
- Laptop with Windows 8.1
- VM Player 12 with Linux installed (Ubuntu Server 14.04)
- ICS-DHCP-SERVER installed and running
- Another LAPTOP conected to a... (1 Reply)
Discussion started by: Portuguevos
1 Replies
LEARN ABOUT FREEBSD
dhclient
DHCLIENT(8) BSD System Manager's Manual DHCLIENT(8)NAME
dhclient -- Dynamic Host Configuration Protocol (DHCP) client
SYNOPSIS
dhclient [-bdqu] [-c file] [-l file] [-p file] interface
DESCRIPTION
The dhclient utility provides a means for configuring network interfaces using DHCP, BOOTP, or if these protocols fail, by statically assign-
ing an address.
The name of the network interface that dhclient should attempt to configure must be specified on the command line.
The options are as follows:
-b Forces dhclient to immediately move to the background.
-c file Specify an alternate location, file, for the configuration file.
-d Forces dhclient to always run as a foreground process. By default, dhclient runs in the foreground until it has configured the
interface, and then will revert to running in the background.
-l file Specify an alternate location, file, for the leases file.
-p file Specify an alternate location for the PID file. The default is /var/run/dhclient.interface.pid.
-q Forces dhclient to be less verbose on startup.
-u Forces dhclient to reject leases with unknown options in them. The default behaviour is to accept such lease offers.
The DHCP protocol allows a host to contact a central server which maintains a list of IP addresses which may be assigned on one or more sub-
nets. A DHCP client may request an address from this pool, and then use it on a temporary basis for communication on the network. The DHCP
protocol also provides a mechanism whereby a client can learn important details about the network to which it is attached, such as the loca-
tion of a default router, the location of a name server, and so on.
On startup, dhclient reads /etc/dhclient.conf for configuration instructions. It then gets a list of all the network interfaces that are
configured in the current system. It then attempts to configure each interface with DHCP.
In order to keep track of leases across system reboots and server restarts, dhclient keeps a list of leases it has been assigned in the
/var/db/dhclient.leases.IFNAME file. IFNAME represents the network interface of the DHCP client (e.g., em0), one for each interface. On
startup, after reading the dhclient.conf(5) file, dhclient reads the leases file to refresh its memory about what leases it has been
assigned.
Old leases are kept around in case the DHCP server is unavailable when dhclient is first invoked (generally during the initial system boot
process). In that event, old leases from the dhclient.leases.IFNAME file which have not yet expired are tested, and if they are determined
to be valid, they are used until either they expire or the DHCP server becomes available.
A mobile host which may sometimes need to access a network on which no DHCP server exists may be preloaded with a lease for a fixed address
on that network. When all attempts to contact a DHCP server have failed, dhclient will try to validate the static lease, and if it succeeds,
it will use that lease until it is restarted.
A mobile host may also travel to some networks on which DHCP is not available but BOOTP is. In that case, it may be advantageous to arrange
with the network administrator for an entry on the BOOTP database, so that the host can boot quickly on that network rather than cycling
through the list of old leases.
NOTES
You must have the Berkeley Packet Filter (BPF) configured in your kernel. The dhclient utility requires at least one /dev/bpf* device for
each broadcast network interface that is attached to your system. See bpf(4) for more information.
FILES
/etc/dhclient.conf DHCP client configuration file
/var/db/dhclient.leases.IFNAME database of acquired leases
SEE ALSO dhclient.conf(5), dhclient.leases(5), dhclient-script(8)AUTHORS
The dhclient utility was written by Ted Lemon <mellon@fugue.com> and Elliot Poger <elliot@poger.com>.
The current implementation was reworked by Henning Brauer <henning@openbsd.org>.
BSD October 13, 2011 BSD