I have virtualmin installed on a Debian server. As far as I can tell, things seem to be working correctly, but checking /var/log/syslog, I have a whole bunch of lines like this about once every minute or so:
349018 Nov 18 19:12:33 snail named[2688]: error (unexpected RCODE REFUSED) resolving '128.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349019 Nov 18 19:12:33 snail named[2688]: error (unexpected RCODE REFUSED) resolving '128.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349020 Nov 18 19:12:34 snail named[2688]: error (unexpected RCODE REFUSED) resolving '219.181.228.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349021 Nov 18 19:12:34 snail named[2688]: error (unexpected RCODE REFUSED) resolving '219.181.228.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349022 Nov 18 19:12:35 snail named[2688]: error (unexpected RCODE REFUSED) resolving '219.181.228.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349023 Nov 18 19:12:36 snail named[2688]: error (unexpected RCODE REFUSED) resolving '219.181.228.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349024 Nov 18 19:12:36 snail named[2688]: error (unexpected RCODE REFUSED) resolving '115.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349025 Nov 18 19:12:37 snail named[2688]: error (unexpected RCODE REFUSED) resolving '115.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349026 Nov 18 19:12:38 snail named[2688]: error (unexpected RCODE REFUSED) resolving '115.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349027 Nov 18 19:12:38 snail named[2688]: error (unexpected RCODE REFUSED) resolving '115.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349028 Nov 18 19:12:38 snail named[2688]: error (unexpected RCODE REFUSED) resolving '252.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349029 Nov 18 19:12:39 snail named[2688]: error (unexpected RCODE REFUSED) resolving '252.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349030 Nov 18 19:12:40 snail named[2688]: error (unexpected RCODE REFUSED) resolving '252.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349031 Nov 18 19:12:40 snail named[2688]: error (unexpected RCODE REFUSED) resolving '252.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349032 Nov 18 19:12:41 snail named[2688]: error (unexpected RCODE REFUSED) resolving '113.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349033 Nov 18 19:12:41 snail named[2688]: error (unexpected RCODE REFUSED) resolving '113.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349034 Nov 18 19:12:42 snail named[2688]: error (unexpected RCODE REFUSED) resolving '113.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349035 Nov 18 19:12:43 snail named[2688]: error (unexpected RCODE REFUSED) resolving '113.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349036 Nov 18 19:12:44 snail named[2688]: lame server resolving '41.63.46.202.in-addr.arpa' (in '63.46.202.in-addr.arpa'?): 202.46.32.47#53 349037 Nov 18 19:12:44 snail named[2688]: error (unexpected RCODE REFUSED) resolving '163.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349038 Nov 18 19:12:44 snail named[2688]: error (unexpected RCODE REFUSED) resolving '163.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349039 Nov 18 19:12:45 snail named[2688]: error (unexpected RCODE REFUSED) resolving '163.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349040 Nov 18 19:12:46 snail named[2688]: error (unexpected RCODE REFUSED) resolving '163.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349041 Nov 18 19:12:46 snail named[2688]: error (unexpected RCODE REFUSED) resolving '108.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349042 Nov 18 19:12:46 snail named[2688]: error (unexpected RCODE REFUSED) resolving '108.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349043 Nov 18 19:12:47 snail named[2688]: error (unexpected RCODE REFUSED) resolving '108.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349044 Nov 18 19:12:48 snail named[2688]: error (unexpected RCODE REFUSED) resolving '108.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349045 Nov 18 19:12:49 snail named[2688]: error (unexpected RCODE REFUSED) resolving '1.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53 349046 Nov 18 19:12:49 snail named[2688]: error (unexpected RCODE REFUSED) resolving '1.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349047 Nov 18 19:12:50 snail named[2688]: error (unexpected RCODE REFUSED) resolving '1.52.252.183.in-addr.arpa/PTR/IN': 211.136.20.201#53 349048 Nov 18 19:12:50 snail named[2688]: error (unexpected RCODE REFUSED) resolving '1.52.252.183.in-addr.arpa/PTR/IN': 211.136.17.105#53
How can I fix this?
OK, looks like this was an error in my ISP's nameservers since the problem disappears when I use Google's nameservers.