irondhcp is an *experimental* IF-MAP client which can be used in combination with the ISC DHCP server to publish ip-mac metadata on links between ip-address and mac-address identifiers. It does not represent a standalone DHCP server. The program was written using Java. For communication purposes ifmapj is used. Communication between the MAP client and MAP server is done using IF-MAP 2.0. Development was started within the IRON project at Hochschule Hannover (Hannover University of Applied Sciences and Arts). The implementation was maintained and extended within the ESUKOM research project. More information about the projects can be found at the Trust@HsH research group website.