gmane.network.dhcp.isc.dhcp-server

Re: Using OMSHELL to configure host options

Sztrepka Pál — 2013-05-24T07:46:59

Hi,

omshell
obj: <null>
obj: host
obj: host
name = "333"
obj: host
name = "333"
hardware-address = 11:22:33:44:55:66
obj: host
name = "333"
hardware-address = 11:22:33:44:55:66
statements = "option bootfile-name "vvv.cm";"
obj: host
name = "333"
hardware-address = 11:22:33:44:55:66
statements = "option bootfile-name "vvv.cm";"
hardware-type = 00:00:00:00

I hope this help.

2013-05-23 23:46 időpontban Michael Conway ezt írta:

Using OMSHELL to configure host options

Michael Conway — 2013-05-23T21:46:13

I have been searching for an answer to this problem for a little while now, and hope someone on this list can help.

I am using omshell to configure hosts on dhcpd. So far, we just set the hardware and ip address, and that has been enough. I have run into some cases where we also need to set either filename or option bootfile-name options, and I have been unable to find a way to do that.

First, I tried set "option bootfile-name" = "file.cfg"
Then I tried set statements = "option bootfile-name \"/file.cfg\";" as suggested on a few mailing lists

Both attempts result in the error "can't open object: invalid argument" when I issue the create command.

I've also tried using filename instead of bootfile-name, which results in the same behavior.
Is this possible to accomplish with omshell/omapi? I am using isc-dhcpd-4.1.1-P1 on RHEL 6.1

Thanks!

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deny unknown clients in dhcpv6

2013-05-23T15:30:34

Hi,

    I have installed & configure the isc-dhcp-server(dhcpv6) in ubuntu 
12.04,currently every one is getting ip from my server.So i am planning 
to allow only the authorized clients and deny the unknown clients,but i 
don't know how to configure it,please any one help me to fix this 
problem.


Regards
shafi

dns issue

2013-05-23T05:43:48

Hi,

    I have try with ubuntu 12.04 desktop,win7 & 8.

my radvd config file ;

interface eth0.18
{
         AdvSendAdvert on;
         prefix 2404:1f00:31:31::/64
         {
                 AdvOnLink on;
                 AdvAutonomous on;
                 AdvRouterAddr on;
         };

RDNSS 2001:4860:4860::8888
   {
     AdvRDNSSLifetime 10;
   };

   DNSSL bbnl.in
   {
     AdvDNSSLLifetime 10;
   };
};

Regards
shafi

----------------------------------------------------------------------------------------------
Message: 1
Date: Tue, 21 May 2013 19:51:14 +0530
 From: shafi< at >bbnl.co.in
To: <dhcp-users< at >lists.isc.org>
Subject: dns issue
Message-ID: <8596f8d212139dcc277e1e060a2b91ea< at >bbnl.co.in>
Content-Type: text/plain; charset=UTF-8; format=flowed

Hi,

     I have installed isc-dhcp-server in Ubuntu server 12.04.i am 
running
both ipv4 and ipv6. when dhcp clients getting the ipv4 and ipv6 both
everything is working fine,but when clients is getting only the ipv6
it's not getting resolve the name but it's go

Re: dns issue (Steven Carr)

Steven Carr — 2013-05-22T18:20:46

You need to fix the RADVD configuration, it's wrong, it's sending the
flags allowing clients to automatically generate their own IPv6
addresses and bypassing the enforcement of DHCPv6.

The flags you need to indicate that DHCPv6 is in use are:
AdvManagedFlag on;
AdvOtherConfigFlag on;
AdvAutonomous off;

I also assume that the linux box running RADVD is acting as the
router/gateway for the IPv6 network?

Steve



On 22 May 2013 18:39,  <shafi< at >bbnl.co.in> wrote:

Re: dns issue (Steven Carr)

2013-05-22T17:39:23

Hi,

    I have try with ubuntu 12.04 desktop,win7 & 8.

my radvd config file ;

interface eth0.18
{
         AdvSendAdvert on;
         prefix 2404:1f00:31:31::/64
         {
                 AdvOnLink on;
                 AdvAutonomous on;
                 AdvRouterAddr on;
         };

RDNSS 2001:4860:4860::8888
   {
     AdvRDNSSLifetime 10;
   };

   DNSSL bbnl.in
   {
     AdvDNSSLLifetime 10;
   };
};

Regards
shafi

----------------------------------------------------------------------------------------------
Message: 1
Date: Tue, 21 May 2013 19:51:14 +0530
 From: shafi< at >bbnl.co.in
To: <dhcp-users< at >lists.isc.org>
Subject: dns issue
Message-ID: <8596f8d212139dcc277e1e060a2b91ea< at >bbnl.co.in>
Content-Type: text/plain; charset=UTF-8; format=flowed

Hi,

     I have installed isc-dhcp-server in Ubuntu server 12.04.i am 
running
both ipv4 and ipv6. when dhcp clients getting the ipv4 and ipv6 both
everything is working fine,but when clients is getting only the ipv6
it's not getting resolve the name but it's go

Re: LDAP Subclasses in dynamic mode

Jason Brandt — 2013-05-22T00:26:42

Thank you for the clarification, I will research more and make the appropriate changes to conform to standards.  

Jason K. Brandt

Sent from my iPad

On May 21, 2013, at 5:06 PM, Peter Rathlev <peter< at >rathlev.dk> wrote:

Re: LDAP Subclasses in dynamic mode

Peter Rathlev — 2013-05-21T22:06:43

That's not what shared-network does. Shared-network means that the
server expects all those networks to be just one broadcast domain. It
doesn't matter if the networks in question are local or remote. From the
man pages of dhcpd.conf:

:    If any subnet in a shared network has addresses available
:    for dynamic allocation, those addresses are collected into
:    a common pool for that shared network and assigned to
:    clients as needed. There is no way to distinguish on which
:    subnet of a shared network a client should boot.
If all clients explicitly match a class via CI/MAC then you will
probably not see the effect of shared-network, but using shared-network
when the networks do not in fact share a broadcast domain is technically
wrong.


Good thing that's solved. :-)

Re: LDAP Subclasses in dynamic mode

Jason Brandt — 2013-05-21T21:56:51

We're using IP Helpers to point to the server.  So in effect yes it's only
broadcasting on one VLAN.

However, I did just figure out the problem.  For whatever reason, the
subclass entry starting with 1:xx:xx:xx:xx:xx:xx works fine in static mode,
upon getting the LDAP debugging working, i discovered it was querying for
01:xx:xx:xx:xx:xx:xx, which is why it was not finding a match.  I corrected
my entry in LDAP, and everything started working properly!

Thanks to Steven Carr for helping me work through things.


On Tue, May 21, 2013 at 4:44 PM, Peter Rathlev <peter< at >rathlev.dk> wrote:

Re: LDAP Subclasses in dynamic mode

Peter Rathlev — 2013-05-21T21:44:17

I'm afraid I don't know much about LDAP and DHCP, but the following
struck me as odd:

On Thu, 2013-05-16 at 16:10 -0500, Jason Brandt wrote:
...
...
...

You have exactly one broadcast domain/VLAN with all those networks?
That's the only reason to use "shared-network" AFAIK.

Re: dhclient with multiple routing tables

Fernando — 2013-05-21T19:00:36

Hi all, thanks for the support, in fact with the clue given by Steven 
and reading /sbin/dhclient-script I was able to extract all the 
variables I need using a script in /etc/dhcp/dhclient-enter-hooks.d and 
now I am half way done, now with some changes in /sbin/dhclient-script I 
will be able to make dhcp write the configs in alternate routing tables 
because it uses the simple and well known route comand.... ;-)

With the modifications I beleave that I will be able to do somethig like 
dhclient eth0 && dhclient eth1 and as a resut have 2 instances of 
dhclient running each one writing in a different routing table...  will 
keep you posted!

Thanks!



Em 21/05/2013 14:47, Simon Hobson escreveu:

Re: dhclient with multiple routing tables

Simon Hobson — 2013-05-21T17:47:34

You can fix that easily - don't do any NAT other than on the routers.
Say your router A NATs its public IP to 192.168.1.0/24, and router B NATs its public IP to 192.168.2.0/24. You give your machine an interface in both subnets, and ROUTE between those and your internal network on (say) 192.168.3.0/24. Note I said ROUTE - just route without any NAT and you eliminate the second NAT layer.
All it needs is to add a static route to each router so it knows to send packets for 192.168.3.0/24 via your server. You could possibly include the two "external" networks as well, but I doubt that's required - ie give router A a static route for 192.168.2.0/24 via your server, and router B a static route for 192.168.1.0/24 via your server.

That will eliminate the two layers of NAT, though if you want to configure stuff that the routers can't do then you may still have a reason for wanting to get rid of them.

Also, you might cnsider getting the DHCP client to do all the stuff that will keep the ISP happy, but statically c

Re: dhclient with multiple routing tables

Gregory Sloop — 2013-05-21T16:19:12

If you're really cheap, you might consider a MikroTik routerboard -
perhaps an RB450G. For about $100-200, perhaps less, depending on your
requirements - you can probably accomplish all you're looking to do.
[At least as I understand it - though it's possible I'm not sure what
you're trying to do either.]

-Greg

SC> Asking the same question a second time when no-one responded the first
SC> time isn't going to get you an answer.

SC> From a quick Google search it looks like dhclient doesn't do this out
SC> of the box, you're gonna have to modify the scripts dhclient runs post
SC> interface up to implement updating different routing tables.

SC> Easiest option is to install an intermediate box (see Peplink, Elfiq,
SC> F5, Barracuda) that can properly share/prioritise/failover your
SC> Internet links for you.


SC> On 21 May 2013 16:31, Fernando <devel< at >netkeep.com.br> wrote:
SC> _______________________________________________
SC> dhcp-users mailing list
SC> dhcp-users< at >lists.isc.org
SC> https://lists.isc.org/ma

Re: dhclient with multiple routing tables

Steven Carr — 2013-05-21T16:00:23

Asking the same question a second time when no-one responded the first
time isn't going to get you an answer.

From a quick Google search it looks like dhclient doesn't do this out
of the box, you're gonna have to modify the scripts dhclient runs post
interface up to implement updating different routing tables.

Easiest option is to install an intermediate box (see Peplink, Elfiq,
F5, Barracuda) that can properly share/prioritise/failover your
Internet links for you.


On 21 May 2013 16:31, Fernando <devel< at >netkeep.com.br> wrote:
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dhclient with multiple routing tables

Fernando — 2013-05-21T15:31:10

Hi everyone, I´m having trouble finding a way to make dhclient put it´s 
output into a specific routing table, my scenario is:
I have two internet connections and until now i can only setup both 
using static IPs, that´s force me or routing the modems when it´s 
possible or use routers  between the modems and the server, in both 
cases my network will be under two NATs, one from the routers and other 
from the server itself. So, to simplify thinks and make then more 
elegant I want to eliminate the routers, to do that I need that dhclient 
put the configurations that it accquire from ISPs into specific routing 
tables instead the default "main" routing table (found in 
/etc/iproute2/rt_tables)...
So I need two daemons running togheter one listening in one interface 
(ex eth1) and send the configs to the table ex. LINK1 and another daemon 
listening on the other interface (ex eth2) and sends the configs to 
other table ex LINK2

Any ideas?

Thanks!

Re: dns issue

Steven Carr — 2013-05-21T14:46:25

What is the client OS? And what RA flags have been configured on the
router of the IPv6 network?

dns issue

2013-05-21T14:21:14

Hi,

    I have installed isc-dhcp-server in Ubuntu server 12.04.i am running 
both ipv4 and ipv6. when dhcp clients getting the ipv4 and ipv6 both 
everything is working fine,but when clients is getting only the ipv6 
it's not getting resolve the name but it's going out via ip address.i 
hope something i mess up here.please help me what i want to do here.

i have mention my dhcpv6 configuration file here.



default-lease-time 600;
max-lease-time 7200;
#log-facility local7;
subnet6 2404:1f00:31:31::/64 {
         # Range for clients
         range6 2404:1f00:31:31::2 2404:1f00:31:31::254;
         # Additional options
#        option dhcp6.name-servers 2404:1f00:4::7;
         option dhcp6.name-servers 2001:4860:4860::8888;
         option dhcp6.domain-search "bbnl.in";
};

Regards
shafi


---------------------

Re: Running dhcp relay and client on same machine

Sten Carlsen — 2013-05-20T16:39:09

Ok, I see the picture. If the router had a DHCP-helper or relay
built-in, that might be an easy way. Other than that I have no proposals
at the moment.


On 20/05/13 17:47, Sara Saleem wrote:

Re: Running dhcp relay and client on same machine

Sara Saleem — 2013-05-20T15:47:01

I am trying to configure multiple interfaces of one router operating on
different frequency/channels.


On Mon, May 20, 2013 at 4:01 AM, Sten Carlsen <stenc< at >s-carlsen.dk> wrote:

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Re: Running dhcp relay and client on same machine

Sten Carlsen — 2013-05-20T11:01:46

Just out of curiosity, what problem are you trying to solve?


On 20/05/13 5:05, SSquare wrote:

Re: Running dhcp relay and client on same machine

SSquare — 2013-05-20T03:05:16

Thanks so here is the other scenario. Can I run DHCP relay on one interface
(A) and DHCP client on another interface (B) and then forward the DHCP
REQUEST of B through A.

Best.
-Sara


On Sun, May 19, 2013 at 7:21 PM, Glenn Satchell
<glenn.satchell< at >uniq.com.au>wrote:

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