Inter-PLMN communication

An apparatus comprising:

• at least one processor,
• at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:
• receive from an entity a message initiating a setup of an N32-c transport layer security connection t with the apparatus, the entity located in a first public land mobile network and the apparatus located in a second public land mobile network;
• receive a N32-c handshake signalling message from the entity on the N32-c transport layer security connection, the N32-c handshake signalling message comprising domain name information of the entity to be used by the apparatus for establishing an N32-f transport layer security connection towards the entity;
• send a reply to the entity, the reply comprising domain name information of the apparatus to be used by the entity for establishing the N32-f transport layer security connection towards the apparatus.

A method performed by an apparatus, comprising:

• initiating establishment of an N32-c transport layer security connection with an entity, the apparatus located in a first public land mobile network and the entity located in a second public land mobile network;
• sending from the apparatus to the entity on the N32-c transport layer security connection an N32-c handshake signalling message comprising domain name information of the apparatus to be used by the entity for establishing an N32-f transport layer security connection towards the apparatus;
• receiving a reply from the entity, the reply comprising domain name information of the entity to be used by the apparatus for establishing the N32-f transport layer security connection towards the entity;
• and
• using the domain name information received in the reply to establish the N32-f transport layer security connection towards the entity.