METHOD FOR REMOTELY SERVICING A FIELD DEVICE OF AUTOMATION TECHNOLOGY

The invention relates to a method for remotely servicing a field device (A) of automation technology located in a first network (LI) secured by a first firewall (Fl), wherein remote servicing occurs via a servicing device (E) associated with a second network (L2) secured by a second firewall (F2), wherein the method includes steps as follows: establishing a first communication connection (1) between the field device (A) and a gateway (B) associated with the first network (LI); establishing a second communication connection (2) between the first gateway (B) and an Internet (WWW) addressable, broker server (C) via an unsecured access (Port 80) of the first gateway (B); reporting of the first gateway (B) at the broker server (C); granting a unique identifier by the broker server (C) for the first communication connection (2) between the first gateway (B) and the broker server (C); transmitting the unique identifier to a second gateway (D) associated with the second network (L2); establishing a third communication connection (3) between the second gateway (D) and the broker server (C) using the unique identifier; establishing a communication connection (3, 2) between the second gateway (D) and the first gateway (B), wherein the broker server (C) logically connects the second communication connection (2) and the third communication connection (3) with one another, so that communication connection (1, 2, 3, 4) between the servicing device (E) and the field device (A) is produced.