Dear Maintainer, rpc.rquotad does bind to an IPv4-only listening socket: # netstat --tcp -anp | grep rpc.rquota tcp 0 0 0.0.0.0:948 0.0.0.0:* LISTEN 15189/rpc.rquotad Thus it can't be used in an IPv6-only network. Clients requesting quota status try to handshake with the server on port 948, but do so with IPv6. The server returns "connection refused", as rpc.rquotad does not accept connections on v6. rpc.rquotad must bind to [::]:948 in order to be usuable with IPv6. I checked the documentation, but it seems like rpc.rquotad can't be configured to do so. There seems to be no workaround. If IPv4 is not available in the network, no remote quota is available.