There is provided an apparatus including an information conversion apparatus provided to a relay device for relaying between a server to which a first network address is allocated and a client terminal to which a second network address is allocated, the information conversion apparatus including: an analyzer which analyzes a message corresponding to Layer 7 of an OSI basic reference model of a received packet and determines whether a URL expressed as a literal network address is included; and an address converter which mutually converts, when a URL expressed as a literal network address is included, the literal network address in the URL between the first network address and the second network address.