Re: [CentOS] CENTOS DHCP Server and windows computer/host name ISSUE
On Tuesday, August 24, 2010, linux-crazy hichee...@gmail.com wrote: Is there is any configuration to be tuned on dhcpd.conf or any files or parameter to be tuned on windows 2003 guests to get the hostname from the DHCP/DNS . i heard about some option like *dhcpd opt 12* on windows regisrty level will do the job , But am blank how to get things done . . Ask on a Windows list? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CENTOS DHCP Server and windows computer/host name ISSUE
See inline, please
linux-crazy wrote:
Hi list,
We are running few Centos5.4 and windows 2003 instance on CENTOS XEN
virtualized environment , all the guest are getting the
IP/NETWORK/GATEWAY setting from the DHCP Server running on CENTOS 5
server and the DNS configured on the windows 2003 server.
All of the CENTOS Guests are getting the IP and the host name as per
the DNS forward look up configured. For example If the CENTOS guest1
get x.y.z.1 as an IP and it gets the host name as machine1.example.com
http://machine1.example.com and so on .
But none of the windows guest is getting the hostname or computer name
from the DHCP server even though its getting the ip from the centos DHCP
server properly , instead all the windows guest are setting up the
hostname or computername as ORGNAME-withsomenumbers . eg:
techsoft-342156 as a computer name .
See at present we are not doing any static mapping of IP/HOSTNAME based
on windows GUEST MAC address. So statically mapping the hostname/ip with
guest MAC address is out of question now.
Is there is any configuration to be tuned on dhcpd.conf or any files or
parameter to be tuned on windows 2003 guests to get the hostname from
the DHCP/DNS . i heard about some option like *dhcpd opt 12* on
windows regisrty level will do the job , But am blank how to get things
done .
Also is there is a way to tune CENTOS DHCP Server to lease the ip to the
dhcp client in uniform order rather it leases randomly .
I use mac address reservations in the /etc/dhcpd.conf file, like so:
host linsrv {
hardware ethernet 00:50:fc:57:5c:db;
option host-name linsrv;
fixed-address 192.168.100.254;
}
If any one throws me some light on how to get this done it will be
really great full for me .
Regards,
Lingu
HTH,
Phil
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Re: [CentOS] CENTOS DHCP Server and windows computer/host name ISSUE
On Tue, Aug 24, 2010 at 3:12 PM, linux-crazy hichee...@gmail.com wrote: Hi list, We are running few Centos5.4 and windows 2003 instance on CENTOS XEN virtualized environment , all the guest are getting the IP/NETWORK/GATEWAY setting from the DHCP Server running on CENTOS 5 server and the DNS configured on the windows 2003 server. All of the CENTOS Guests are getting the IP and the host name as per the DNS forward look up configured. For example If the CENTOS guest1 get x.y.z.1 as an IP and it gets the host name as machine1.example.com and so on . But none of the windows guest is getting the hostname or computer name from the DHCP server even though its getting the ip from the centos DHCP server properly , instead all the windows guest are setting up the hostname or computername as ORGNAME-withsomenumbers . eg: techsoft-342156 as a computer name . See at present we are not doing any static mapping of IP/HOSTNAME based on windows GUEST MAC address. So statically mapping the hostname/ip with guest MAC address is out of question now. Is there is any configuration to be tuned on dhcpd.conf or any files or parameter to be tuned on windows 2003 guests to get the hostname from the DHCP/DNS . i heard about some option like dhcpd opt 12 on windows regisrty level will do the job , But am blank how to get things done . Also is there is a way to tune CENTOS DHCP Server to lease the ip to the dhcp client in uniform order rather it leases randomly . If any one throws me some light on how to get this done it will be really great full for me . Regards, Lingu ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Why don't you run DHCP DNS on CentOS? -- Linux User #452368 http://twitter.com/vpadro Everything that irritates us about others can lead us to an understanding of ourselves ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CENTOS DHCP Server and windows computer/host name ISSUE
On Tue, 24 Aug 2010, Phil Savoie wrote:
I use mac address reservations in the /etc/dhcpd.conf file, like so:
host linsrv {
hardware ethernet 00:50:fc:57:5c:db;
option host-name linsrv;
fixed-address 192.168.100.254;
}
The way that I always do it is:
host foobar {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address hostname.domain.org;
}
and rely on the DNS to supply the fixed IP address. This works for Linux,
Windows XP, Vista and 7, and OS X.
Steve
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Re: [CentOS] CentOS DHCP Server
Dnsmasq...good lightweight program that works in many instances. This was a very good lesson for me to first do a less on /etc/services before I bother the group with questions (noob mistake). I just configured BIND to handle my DNS requests. This particular box is a hybrid/appliance of sorts that we are working on in a lab. It functions as a firewall between the Internet and a private /24 LAN running iptables. It runs Aterisk for internal/external SIP communications with a hacked up interface of Spencer's code to have a branded look. Internally it runs DHCP for phones and PC's and DNS for internal LAN and Internet resolution of hosts. And Apache an TFTP for booting of SIP-phone-filesystems and logos on the phones. Probably a much better/faster/lighter way to do it all but it serves test purposes for now. Thanks all for the direction. LK -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Alan McKay Sent: Tuesday, December 08, 2009 4:45 PM To: CentOS mailing list Subject: Re: [CentOS] CentOS DHCP Server On Tue, Dec 8, 2009 at 4:35 PM, Kemp, Larry larry.k...@usmetrotel.com wrote: Yep. Dnsmasq was parked on 67. Gonna have to yum remove him. Big thanks guys. better be sure first that it is not also acting as a DNS server since it does both -- Don't eat anything you've ever seen advertised on TV - Michael Pollan, author of In Defense of Food ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS DHCP Server
On Tue, Dec 8, 2009 at 3:03 PM, Kemp, Larry larry.k...@usmetrotel.com wrote: CentOS Community, I need help with a CentOS DHCP server. I have a simple 32bit CentOS 5.3 server running on an Intel chip server in a lab environment with two NIC's. Interfaces: eth0 - Is connected to the Internet using a static public IP address. eth1 - Is connected to a private 10.1.1.0/24 LAN with no other access to the web. Runs DHCP to the internal client systems. Is the default gateway for all LAN traffic to the Internet. Runs iptables as the firewall between the LAN and the Internet. On eth1 DHCP was running with no problems for some time. This lab system sat for months untouched and then we revisited this product/project only to find that DHCP would not start. It gave us this following error: Failed to start dhcpd : Internet Systems Consortium DHCP Server V3.1.3 Copyright 2004-2009 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Wrote 0 leases to leases file. Listening on LPF/eth1/00:50:ba:c0:43:c7/10.1.1/24 Sending on LPF/eth1/00:50:ba:c0:43:c7/10.1.1/24 Can't bind to dhcp address: Address already in use Please make sure there is no other dhcp server running and that there's no entry for dhcp or bootp in /etc/inetd.conf. Also make sure you are not running HP JetAdmin software, which includes a bootp server. snip The error message makes me think another dhcpd daemon is running. Have you checked for this with 'ps aux | grep dhcpd' or similar? Since you've done updates, I'd assume you've rebooted the server, so it seems strange this might be the issue. Could possibly check to see if there is indeed another dhcpd daemon running. Something along the lines of 'netstat -patun | grep dhcp' or look for anything listening on UDP:68, iirc. Someone else will probably be able to provide better help. -jonathan ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS DHCP Server
On Tue, 2009-12-08 at 16:03 -0500, Kemp, Larry wrote: CentOS Community, I need help with a CentOS DHCP server. I have a simple 32bit CentOS 5.3 server running on an Intel chip server in a lab environment with two NIC's. Interfaces: eth0 - Is connected to the Internet using a static public IP address. eth1 - Is connected to a private 10.1.1.0/24 LAN with no other access to the web. Runs DHCP to the internal client systems. Is the default gateway for all LAN traffic to the Internet. Runs iptables as the firewall between the LAN and the Internet. On eth1 DHCP was running with no problems for some time. This lab system sat for months untouched and then we revisited this product/project only to find that DHCP would not start. It gave us this following error: Failed to start dhcpd : Internet Systems Consortium DHCP Server V3.1.3 Copyright 2004-2009 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Wrote 0 leases to leases file. Listening on LPF/eth1/00:50:ba:c0:43:c7/10.1.1/24 Sending on LPF/eth1/00:50:ba:c0:43:c7/10.1.1/24 Can't bind to dhcp address: Address already in use Please make sure there is no other dhcp server running and that there's no entry for dhcp or bootp in /etc/inetd.conf. Also make sure you are not running HP JetAdmin software, which includes a bootp server. There is no other DHCP server on this LAN or on the public /30 that eth0 connects to (not that eth0 would impact my internal LAN). I'm just guessing here, but I think that this message is telling you that something else is bound to that interface on port 67 ( DHCP server port ) which occasionally can happen by chance. Try lsof like this ( as root, of course ): lsof -i -Pn | grep :67 This should show you what has grabbed port 67 and it may be something you can stop and restart to get a different ( random ) port assignment. Like I said, this is just a guess. I saw there were ofcourse many systems updates for CentOS and thought that a might resolve. It did not. I then downloaded many versions of ISC's DHCP and compile and tried each of them from source code. This problems still exists. I have tried even the very simplest of dhcp.conf files and DHCP will still not start. Have I found a bug in the ISC DHCP code? Unlikely. I hope that one of you has run into this before and can help me out. Thanks greatly in advance. Respectfully, Larry Kemp Network Engineer U.S. Metropolitan Telecom, LLC Bonita Springs FL USA ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Ron Loftin relof...@twcny.rr.com God, root, what is difference ? Piter from UserFriendly ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS DHCP Server
See if someone else is hanging onto port 67 [r...@morrison ~]# lsof -i -P | grep :67 dnsmasq 23404nobody5u IPv4 46029087 UDP *:67 dnsmasq is a popular light-weight DHCP server -- “Don't eat anything you've ever seen advertised on TV” - Michael Pollan, author of In Defense of Food ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS DHCP Server
Yep. Dnsmasq was parked on 67. Gonna have to yum remove him. Big thanks guys. LK -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Ron Loftin Sent: Tuesday, December 08, 2009 4:13 PM To: CentOS mailing list Subject: Re: [CentOS] CentOS DHCP Server On Tue, 2009-12-08 at 16:03 -0500, Kemp, Larry wrote: CentOS Community, I need help with a CentOS DHCP server. I have a simple 32bit CentOS 5.3 server running on an Intel chip server in a lab environment with two NIC's. Interfaces: eth0 - Is connected to the Internet using a static public IP address. eth1 - Is connected to a private 10.1.1.0/24 LAN with no other access to the web. Runs DHCP to the internal client systems. Is the default gateway for all LAN traffic to the Internet. Runs iptables as the firewall between the LAN and the Internet. On eth1 DHCP was running with no problems for some time. This lab system sat for months untouched and then we revisited this product/project only to find that DHCP would not start. It gave us this following error: Failed to start dhcpd : Internet Systems Consortium DHCP Server V3.1.3 Copyright 2004-2009 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Wrote 0 leases to leases file. Listening on LPF/eth1/00:50:ba:c0:43:c7/10.1.1/24 Sending on LPF/eth1/00:50:ba:c0:43:c7/10.1.1/24 Can't bind to dhcp address: Address already in use Please make sure there is no other dhcp server running and that there's no entry for dhcp or bootp in /etc/inetd.conf. Also make sure you are not running HP JetAdmin software, which includes a bootp server. There is no other DHCP server on this LAN or on the public /30 that eth0 connects to (not that eth0 would impact my internal LAN). I'm just guessing here, but I think that this message is telling you that something else is bound to that interface on port 67 ( DHCP server port ) which occasionally can happen by chance. Try lsof like this ( as root, of course ): lsof -i -Pn | grep :67 This should show you what has grabbed port 67 and it may be something you can stop and restart to get a different ( random ) port assignment. Like I said, this is just a guess. I saw there were ofcourse many systems updates for CentOS and thought that a might resolve. It did not. I then downloaded many versions of ISC's DHCP and compile and tried each of them from source code. This problems still exists. I have tried even the very simplest of dhcp.conf files and DHCP will still not start. Have I found a bug in the ISC DHCP code? Unlikely. I hope that one of you has run into this before and can help me out. Thanks greatly in advance. Respectfully, Larry Kemp Network Engineer U.S. Metropolitan Telecom, LLC Bonita Springs FL USA ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Ron Loftin relof...@twcny.rr.com God, root, what is difference ? Piter from UserFriendly ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS DHCP Server
On Tue, Dec 8, 2009 at 4:35 PM, Kemp, Larry larry.k...@usmetrotel.com wrote: Yep. Dnsmasq was parked on 67. Gonna have to yum remove him. Big thanks guys. better be sure first that it is not also acting as a DNS server since it does both -- “Don't eat anything you've ever seen advertised on TV” - Michael Pollan, author of In Defense of Food ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
