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24 views

Server 2008R2 DHCP Server not responding to Windows Clients

I have a Windows 2008R2 Server running DHCP Server, configured with a custom dll to assign IP addresses based on circuit IDs. Linux clients and pxe boots (using ipxe) recieve IP addresses from the ...
2
votes
0answers
33 views

How did AirPort's DHCP “Welcome Message” work?

I remember that Apple's AirPort base stations used to have a DHCP "Welcome Message" feature, that would display a custom pop-up dialog when computers connected to the network. How was this ...
4
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0answers
79 views

VLAN ID over DHCP for Management Interface of Fortinet FortiAP

When configuring the FortiAP device it's desirable to configure the VLAN ID for the tagged management network. Accordingly to the manual it's possible to do so by "telnetting" to the FortiAP device ...
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0answers
119 views

pxe boot uefi ends with pxe-e16: No offer received - ip helper address in place

I've been deploying Windows with wds 2012 to clients running in BIOS mode forever, using wds 2012 and dhcp in the same network, but on different boxes. clients are in a different network and on the ...
2
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0answers
56 views

Can ISC-DHCP bind to Option 82 rather than Mac Addresses?

We use option 82 information to limit leases presently in ISC-DHCP using a spawn with statement for our billing subclass. This keeps a single household/business from obtaining more leases than they ...
0
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1answer
274 views

How can a dhcp client in linux can send the dhcp option 60 - specifying the vendor-id?

I am using fedora core machine. My linux- fedora core machine - client wants to send the dhcp option 60 specifying the vendor id to the dhcp server. Next, I want to read the dhcp option 43 send by the ...
2
votes
1answer
2k views

Cant deploy images with WDS: PXE-E16: No offer received

I am currently playing around with a WDS lab environment on a virtual 2012 R2 server, which is patched to the latest available update-level. This server is running the DHCP server role and has two ...
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0answers
178 views

Sonicwall L2TP Server is using a “phantom” internal DHCP server

Following a few articles on options 121 and 249, I'd like to push out routes to the L2TP VPN clients using the internal DHCP server on the Sonicwall. However, the Sonicwall seems to be using a ...
1
vote
1answer
203 views

ISC dhcpd dynamic bootfile-name. Is this possible?

Actually I want to dinamically assign bootfile-name based on clients MAC. I have tried this config: option bootfile-name concat( binary-to-ascii(16, 8, "", substring (hardware, 1, 6)), ".cfg"); ...
0
votes
1answer
292 views

How to trigger DHCP request and inspect the reply from DHCP server

Is it possible to trigger a DHCP request from my DHCP server and then sniff and inspect the whole DHCP reply from the server to see what options/parameters it sends to the clients?
4
votes
0answers
85 views

Assigning option based on class membership inside the subnet section

We are looking for a way to do something along these lines in the dhcpd.conf file: subnet ... { #couple of options for the subnet here pool { allow members of "class-name1"; ...
1
vote
0answers
367 views

Libvirt providing bootp options without being configured to do so

I have a virtual network configured in libvirt and configured to provide DHCP (via dnsmasq) but not configured to provide bootp information (see below), but when I boot an iPXE ISO and look at the ...
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0answers
205 views

How to send several instances of the vendor-specific options to a DHCP server using dhclient?

I need to send vendor-options to DHCP server using dhclient (ISC). I've added following lines in the dhclient.conf: option dhcp6.vendor-class code 16 = {integer 32, integer 16, string}; send ...
-3
votes
1answer
2k views

Can I see DHCP options on my network from a windows client? [closed]

Is there anyway to see the DHCP options configured on the server from a windows client (win 7) with no login / admin access to the server?
1
vote
1answer
302 views

Why use FQDN as DNS-server option in DHCP?

I've seen multiple default configurations of DHCP-servers with a FQDN set as the DNS-server option. Doesn't this imply a catch-22, or the need for that DNS-server to be in the hosts file of every ...
2
votes
1answer
186 views

Cannot assign IP address according to an option parameter

I have this DHCP conf file: authoritative; option domain-name "XXX.XXX.XX"; allow bootp; ddns-update-style ad-hoc; class "karpuz-kabugu" { match if (substring (option user-class, 0, 6) = ...
1
vote
1answer
1k views

Mac OS X Server Configure DHCP Options 66 and 67

I need to configure Mountain Lion (10.8.2) OS X Server BOOTP to provide DHCP options 66 and 67 to provide PXE booting for PCs on my network. I have tried following the bootpd MAN pages, but they are ...
2
votes
0answers
285 views

setup static route via dhcp

I try to push static routes over dhcp in a redhat enviroment. I have already activatet the option rfc3442-classless-static-routes. The dhcp client is also configured to request this optien as ...
2
votes
1answer
558 views

How to pass a vendor-specific options to a DHCP server using dhclient?

I need to send vendor-options to DHCP server using dhclient (ISC). As I understand I need to describe that options in the dhclient.conf. Do I need make new "space" for options? Or I can do "send"? ...
3
votes
2answers
1k views

How to save DHCP option 43 on Windows 2008 server?

I need to retrieve the DHCP option 43 from my DHCP server (Linux ISC DHCP server) on a Windows 2008 server (or any other Windows version, as long as the code 43 is specified in the Parameter request ...
1
vote
1answer
3k views

ISC-DHCP-SERVER - Can different reservations get different options (router, DNS, etc)?

Suppose there's just one Ubuntu / ISC-DHCP (v3) server on the network. I've successfully been able to provide "DHCP reservations" meaning MAC foo gets ip 1.2.3.4, whereas everyone else just gets an ...
2
votes
1answer
179 views

DHCP IPV6 Environment

May I know what are the changes needed in the DHCP message formats if I want to convert into ipv6 environment? Now I am using ipv4 dhcp client and ipv4 dhcp server. But I want to implement this using ...
4
votes
2answers
16k views

Linux DHCP server option 43 vendor-encapsulated-options, how to format/encode?

I admin the network for a small business which has an IPCop firewall box providing DHCP services to the network (and various other services). The DHCP server in IPCop appears to be dhcpd and IPCop ...
1
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2answers
2k views

Two DHCP server in the same subnet

So I change jobs recently and in this new workplace I've found that we've actually got two DHCP servers. In the very same subnet, and they both have the same scope. I did not set up this but I see ...
0
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2answers
622 views

Which DHCP clients use which options?

I would like to use my DHCP server to give information about some local services like ntp, using DHCP options as explained in the dhcp-options(5) manpage. Does anyone here know, or is there a good ...
2
votes
2answers
2k views

Is the native DHCP client for MacOS X able to send “Vendor class identifier” (opTag 60) in a DHCP request?

Is it possible for MacOS X (current version or in any previous one) to easily force DHCP client to send to DHCP server, at the beggining of the conversation - in DHCPDISCOVER packet - option "Vendor ...