Starting Unbound DNS server...
/var/lib/unbound/root.key has content
success: the anchor is ok
[1534250338] unbound[12285:0] debug: creating udp6 socket ::1 53
[1534250338] unbound[12285:0] debug: creating tcp6 socket ::1 53
[1534250338] unbound[12285:0] debug: creating udp4 socket 127.0.0.1 53
[1534250338] unbound[12285:0] debug: creating tcp4 socket 127.0.0.1 53
[1534250338] unbound[12285:0] debug: creating tcp6 socket ::1 8953
[1534250338] unbound[12285:0] debug: creating tcp4 socket 127.0.0.1 8953
[1534250338] unbound[12285:0] debug: setup SSL certificates
[1534250338] unbound[12285:0] debug: switching log to syslog
[12285:0] debug: chdir to /etc/unbound
[12285:0] debug: drop user privileges, run as unbound
[12285:0] debug: read zonefile /var/lib/unbound/24.172.in-addr.arpa for 24.172.in-addr.arpa.
[12285:0] debug: no zonefile /var/lib/unbound/24.172.in-addr.arpa for 24.172.in-addr.arpa.
[12285:0] debug: module config: "validator iterator"
[12285:0] notice: init module 0: validator
[12285:0] info: adding trusted key 24.172.in-addr.arpa. DS IN
[12285:0] debug: reading autotrust anchor file /var/lib/unbound/root.key
[12285:0] info: trust point . : 1
[12285:0] info: assembled 0 DS and 2 DNSKEYs
[12285:0] info: DNSKEY:: .	172800	IN	DNSKEY	257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlExOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgCmr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnXGXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ;{id = 20326 (ksk), size = 2048b}
[12285:0] info: DNSKEY:: .	172800	IN	DNSKEY	257 3 8 AwEAAagAIKlVZrpC6Ia7gEzahOR+9W29euxhJhVVLOyQbSEW0O8gcCjFFVQUTf6v58fLjwBd0YI0EzrAcQqBGCzh/RStIoO8g0NfnfL2MTJRkxoXbfDaUeVPQuYEhg37NZWAJQ9VnMVDxP/VHL496M/QZxkjf5/Efucp2gaDX6RS6CXpoY68LsvPVjR0ZSwzz1apAzvN9dlzEheX7ICJBBtuA6G3LQpzW5hOA2hzCTMjJPJ8LbqF6dsV6DoBQzgul0sGIcGOYl7OyQdXfZ57relSQageu+ipAdTTJ25AsRTAoub8ONGcLmqrAmRLKBP1dfwhYB4N7knNnulqQxA+Uk1ihz0= ;{id = 19036 (ksk), size = 2048b}
[12285:0] info: file /var/lib/unbound/root.key
[12285:0] info: last_queried: 1534250338 Tue Aug 14 12:38:58 2018
[12285:0] info: last_success: 1534250338 Tue Aug 14 12:38:58 2018
[12285:0] info: next_probe_time: 1534291221 Wed Aug 15 00:00:21 2018
[12285:0] info: query_interval: 43200
[12285:0] info: retry_time: 8640
[12285:0] info: query_failed: 0
[12285:0] info: [  VALID  ] .	172800	IN	DNSKEY	257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlExOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgCmr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnXGXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ;{id = 20326 (ksk), size = 2048b} ;;state:2 ;;pending_count:0 last:Mon Aug 13 17:09:19 2018
[12285:0] info: [  VALID  ] .	172800	IN	DNSKEY	257 3 8 AwEAAagAIKlVZrpC6Ia7gEzahOR+9W29euxhJhVVLOyQbSEW0O8gcCjFFVQUTf6v58fLjwBd0YI0EzrAcQqBGCzh/RStIoO8g0NfnfL2MTJRkxoXbfDaUeVPQuYEhg37NZWAJQ9VnMVDxP/VHL496M/QZxkjf5/Efucp2gaDX6RS6CXpoY68LsvPVjR0ZSwzz1apAzvN9dlzEheX7ICJBBtuA6G3LQpzW5hOA2hzCTMjJPJ8LbqF6dsV6DoBQzgul0sGIcGOYl7OyQdXfZ57relSQageu+ipAdTTJ25AsRTAoub8ONGcLmqrAmRLKBP1dfwhYB4N7knNnulqQxA+Uk1ihz0= ;{id = 19036 (ksk), size = 2048b} ;;state:2 ;;pending_count:0 last:Mon Aug 13 17:09:19 2018
[12285:0] debug: validator nsec3cfg keysz 1024 mxiter 150
[12285:0] debug: validator nsec3cfg keysz 2048 mxiter 500
[12285:0] debug: validator nsec3cfg keysz 4096 mxiter 2500
[12285:0] notice: init module 1: iterator
[12285:0] debug: target fetch policy for level 0 is 3
[12285:0] debug: target fetch policy for level 1 is 2
[12285:0] debug: target fetch policy for level 2 is 1
[12285:0] debug: target fetch policy for level 3 is 0
[12285:0] debug: target fetch policy for level 4 is 0
[12285:0] debug: donotq: 127.0.0.0/8
[12285:0] debug: donotq: ::1
[12285:0] debug: total of 59474 outgoing ports available
[12285:0] debug: start threads
[12285:0] debug: libevent 2.1.8-stable user epoll method.
[12285:0] debug: no config, using builtin root hints.
[12285:0] debug: auth zone 24.172.in-addr.arpa. timeout in 0 seconds
[12285:0] debug: cache memory msg=66072 rrset=66072 infra=7808 val=66352 subnet=0
[12285:0] info: start of service (unbound 1.7.3).
Started Unbound DNS server.
[12285:0] debug: autotrust probe timer callback
[12285:0] debug: autotrust probe timer 0 callbacks done
[12285:0] debug: auth zone 24.172.in-addr.arpa.: soa probe serial is 2018031859
[12285:0] debug: auth_zone updated, start transfer
[12285:0] debug: close fd 15
[12285:0] debug: comm point start listening 15
[12285:0] debug: comm point stop listening 15
[12285:0] debug: comm point start listening 15
[12285:0] debug: Reading tcp query of length 18928
[12285:0] debug: comm point stop listening 15
[12285:0] debug: xfr 172.24.21.53: contains SOA serial 2018031859
[12285:0] debug: xfr 172.24.21.53: last AXFR packet
[12285:0] debug: close fd 15
unbound.service: Main process exited, code=dumped, status=11/SEGV
unbound.service: Failed with result 'core-dump'.
unbound.service: Service hold-off time over, scheduling restart.
unbound.service: Scheduled restart job, restart counter is at 5.
Stopped Unbound DNS server.
unbound.service: Start request repeated too quickly.
unbound.service: Failed with result 'core-dump'.
Failed to start Unbound DNS server.