Re: [CentOS] dhclient.conf

2015-03-04 Thread Jim Perrin 


On 03/03/2015 04:32 PM, Pol Hallen wrote:
fig, centos keep only ip from dhcp server (not gw, not dns)
> 
> where is dhclient.conf? I need to create it? If yes, where're the
> default options?

The dhclient.conf file doesn't exist by default in more modern versions
of CentOS. You'll need to create it in /etc/dhcp, or by putting the
requested options in /etc/dhcp/dhclient.d

For CentOS 7, it should be safe to use
http://pkgs.fedoraproject.org/cgit/dhcp.git/plain/README.dhclient.d as
guidelines should you choose the latter route.


-- 
Jim Perrin
The CentOS Project | http://www.centos.org
twitter: @BitIntegrity | GPG Key: FA09AD77
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Re: [CentOS] dhclient.conf

2015-03-03 Thread Ashish Yadav 
Hi,

On Wed, Mar 4, 2015 at 4:02 AM, Pol Hallen  wrote:

> Hi all :-)
>
> on centos 6 I need keep the hostname from a dhcp server:
>
> cat /etc/sysconfig/network-scripts/ifcfg-eth0
>
> DEVICE=eth0
> HWADDR=00:50:56:27:0E:C8
> TYPE=Ethernet
> UUID=20924b21-e92a-4944-a054-06d1967155c1
> ONBOOT=yes
> NM_CONTROLLED=yes
> BOOTPROTO=dhcp
> PEERDNS=yes
>
> with this config, centos keep only ip from dhcp server (not gw, not dns)
>
> where is dhclient.conf? I need to create it? If yes, where're the default
> options?
>

In DHCP server all this parameters (like DNS, GW, Netmask) have to be
configure first. if you want to set the default options
for GW and DNS then please do the changes in DHCP server like below.

Here is the example of dhcpd.conf file,

#
#   DHCP Server Config File
#
ddns-update-style none;
ignore client-updates;

lease-file-name "/var/lib/dhcpd/dhcpd.leases";
authoritative;

option domain-name  "example.com";
default-lease-time  86400;   # 24 hours
max-lease-time  172800;  # 48 hours

subnet 192.168.1.0 netmask 255.255.255.0 {
option routers  192.168.1.1;
option subnet-mask  255.255.255.0;
option broadcast-address192.168.1.255;
option domain-name-servers  192.168.1.1;
option ntp-servers  192.168.1.1;
range   192.168.1.101   192.168.1.200;
}

--Regards
Ashishkumar S. Yadav
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[CentOS] dhclient.conf

2015-03-03 Thread Pol Hallen 

Hi all :-)

on centos 6 I need keep the hostname from a dhcp server:

cat /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
HWADDR=00:50:56:27:0E:C8
TYPE=Ethernet
UUID=20924b21-e92a-4944-a054-06d1967155c1
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=dhcp
PEERDNS=yes

with this config, centos keep only ip from dhcp server (not gw, not dns)

where is dhclient.conf? I need to create it? If yes, where're the 
default options?


thanks for help!

Pol
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[CentOS] dhclient.conf being ignored!

2010-05-04 Thread Todd Denniston 
It seems that the prominent North American Enterprise Linux vendor has decided 
that dhclient.conf
should be ignored, i.e. ifup-eth causes dhclient to be called with "-cf
/etc/dhclient-$(DEVICE).conf", and then ifup-eth/ifdown-eth wipes the file out 
each time.

Through the use of "DHCP_HOSTNAME" in ifcfg-eth0 you can specify a host name, 
but because of the
above behavior of ifup-eth other options don't seem to be able to be passed to 
dhclient.

I tried placing
supersede ntp-servers
into dhclient-up-hooks, but that also seems to be ignored, and my google fu 
seems to be failing on
how to build dhclient-enter-hooks for the purpose (if that would even help).

anyone got better suggestions than:
a) mod /etc/sysconfig/network-scripts/ifup-eth to build 
/etc/dhclient-$(DEVICE).conf combining the
options I want.
b) brute forcing things with `chattr +i /etc/ntp.conf`

-- 
Todd Denniston
Crane Division, Naval Surface Warfare Center (NSWC Crane)
Harnessing the Power of Technology for the Warfighter
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