I have spent this morning figuring out how to get a DSpace Handle Server to accept connections over both IPv4 and IPv6. Previously it was working over IPv4 only. The usual Google hunt didn’t turn up any advice, though it did turn up the exact opposite of what I wanted (how to get it to only run on IPv4).

In the end the solution turned out to be very simple, just not documented. In the handle server’s configuration file changing the bind_address entries from the IPv4 address to :: and it will start listening on the relevant port on all interfaces (IPv4 and IPv6).