Tag Archives: server

DHCP Server: Flexible IP address ranges, GUI improvements

Posted by on May 13, 2011 No comments

Welcome update in Alax.Info DHCP Server to provide flexibility in IP address allocation ranges and more features.

The application does not require that IP address block is a single range of addresses. While this is still cool for simplicity, some guys out there have really huge networks with specific requirements. From now on, an “advanced” links opens an additional opportunity to:

  • define multiple blocks of IP addresses to get from
  • opportunity to provide exclusion addresses, ranges and even wildcards

The syntax is straightforward:

  • one range per line, x.x.x.x-y.y.y.y
  • optional exclusion list following in brackets
    • excluded items are separated by comma
    • excluded item may be a single address x.x.x.x, range x.x.x.x-y.y.y.y or a wildcarded address/range x.x.*.x-y.y.*.y

Additionally, it is possible to include DNS Domain Name (option 15) with the DHCP responses:

The GUI makes it clear that it is possible to provide multiple addresses using comma separation. While this was possible before UI did not make it clear enough.

More to this,it is possible to export lease list into clipboard in comma-separated value (CSV) format and transfer data into, e.g. Microsoft Excel:

Updated Alax.Info DHCP Server is cooler and fancier at the same unbelievable price: free for personal use, commercial license for premium features, non-personal use and technical support.

DHCP Server: List of Issued Leases

Posted by on June 13, 2009 No comments

Alax.Info DHCP Server was updated to provide user interface and show a list of issued DHCP leases, including:

  • hardware (MAC) address and IP address correspondence
  • latest date and time of DHCP lease issue
  • sortable list to be able to conveniently arrange entries and lookup items of interest

DHCP Lease List

Other changes include:

  • stores latest lease issue date and time in registry to be able to locate recently issued leases
  • indicates Windows service status through system tray icon (running or stopped)
  • minor fixes

Release information:

DHCP Server: More Configuration Choices for Router, Time Server and DNS Server (Options 3, 4 and 6)

Posted by on February 27, 2009 No comments

Alax.Info DHCP Server received more configuration options and allows customizable DHCP parameters, options 3, 4 and 6:

Registry:
                                           Data
Tag       Name                             Length  Meaning                                           Reference
--------  -------------------------------  ------  ------------------------------------------------  ---------
3         Router                           N       N/4 Router addresses                              [RFC2132]
4         Time Server                      N       N/4 Timeserver addresses                          [RFC2132]
6         Domain Server                    N       N/4 DNS Server addresses                          [RFC2132]

Application GUI allows configuration of the options, including multiple IP addresses per option and “this” placeholder to be replaced with selected network adapter’s IP address:

Options Property Page

The DHCP Server application responds to the network device with a packet of the following kind (captured by WireShark):

Wireshark DHCP ACK Packet

Release information: