Hi, I am having difficulties running knot on an dualstack host. I want Knot to listen on all IPv4 and all IPv6 interfaces. I am using this interfaces section in config file: interfaces { allv4 { address 0.0.0.0; } allv6 { address [::]; } } Using this config, Knot listens only on v4 address and gives an error binding the v6 address: 2012-07-27T13:21:44.646094+02:00 Binding to interface 0.0.0.0 port 53. 2012-07-27T13:21:44.646197+02:00 [error] Cannot bind to socket (98). 2012-07-27T13:21:44.646233+02:00 [error] Could not bind to TCP interface :: port 53. 2012-07-27T13:21:44.646240+02:00 Binding to interface :: port 53. Changing interface order the other way around results in listening on v6 only with same error, yet also v4 connections are accepted, probably due to IPV6_V6ONLY socket option not being turned on by Knot. When I tried changing listening port on either line, problem disappeared. I am using Debian package, version 1.0.6-1~bpo60+1. Cheers, Ondřej Caletka