Hi, I’m running unbound 1.4.22 from debian unstable on my laptop. Since yesterday unbound started behaving strangely, flooding the syslog with failure messages. Example: Oct 16 10:23:20 frustcomp unbound: [26958:0] notice: sendto failed: Cannot assign requested address Oct 16 10:23:20 frustcomp unbound: [26958:0] notice: remote address is 2001:500:3::42 port 53
The pattern is always the same: 'sendto failed' followed by 'remote address is' with varying IPv6 addresses. You can find full unbound-logs for yesterday in [0], created using this command: grep 'unbound' /var/log/syslog.1 > /tmp/unbound_failures.log (Careful: this file is 339M big and has 3642512 lines.) IPv6 is disabled on this system, it has neither an IPv6 address on any interface nor a route set. Today I tried just restarting unbound and that failed as well: # service unbound restart Restarting recursive DNS server: unbound[1444991903] unbound[22562:0] error: can't bind socket: Cannot assign requested address [1444991903] unbound[22562:0] debug: failed address ::1 port 8953 [1444991903] unbound[22562:0] error: cannot open control interface ::1 8953 [1444991903] unbound[22562:0] fatal error: could not open ports failed! # ss -apen | grep 8953 returns nothing listening on that port, just to make sure that’s not the problem. Since the message refers to 'requested address' and probably means ::1, I doubt it is. ::1 is not configured on any interface, as IPv6 is disabled. I can’t figure out either of these problems, and I’m not sure if they are related but the timing seems to suggest that. Can anyone help me understand any of the error messages please? What might cause them? Why do they appear on a system without IPv6 configured? Please tell me (off-list maybe) what other info I should provide. Thank you very much. Sincerely henk [0]: http://henk.hnjs.ch/20151015_unbound_failures.txt -- A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?
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