This morning I see this in the syslog on our primary public DNS host.
internal_send: 142.77.1.1#33950: Connection timed out: 1 Time(s)
internal_send: 142.77.1.1#35153: Connection timed out: 1 Time(s)
internal_send: 142.77.1.1#35644: Connection timed out: 1 Time(s)
internal_send: 142.77.1.1#49394: Connection timed out: 1 Time(s)
internal_send: 142.77.1.1#49816: Connection timed out: 1 Time(s)
internal_send: 142.77.1.1#49929: Connection timed out: 1 Time(s)
internal_send: 142.77.1.1#50281: Connection timed out: 1 Time(s)
internal_send: 142.77.1.1#50453: Connection timed out: 1 Time(s)
internal_send: 142.77.1.1#50534: Connection timed out: 1 Time(s)
. . . (x100s)
dig -x 142.77.1.1
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> -x 142.77.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31154
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3
;; QUESTION SECTION:
;1.1.77.142.in-addr.arpa. IN PTR
;; ANSWER SECTION:
1.1.77.142.in-addr.arpa. 604800 IN PTR ns.uunet.ca.
;; AUTHORITY SECTION:
77.142.in-addr.arpa. 86400 IN NS ns.uunet.ca.
77.142.in-addr.arpa. 86400 IN NS AUTH01.NS.UU.NET.
77.142.in-addr.arpa. 86400 IN NS NS2.uunet.ca.
;; ADDITIONAL SECTION:
AUTH01.NS.UU.NET. 167 IN A 198.6.1.81
ns.uunet.ca. 86400 IN A 142.77.1.1
NS2.uunet.ca. 86400 IN A 142.77.1.5
;; Query time: 114 msec
;; SERVER: 216.185.71.33#53(216.185.71.33)
;; WHEN: Thu May 1 09:59:50 2014
;; MSG SIZE rcvd: 176
What is this and why is it happening?
--
*** E-Mail is NOT a SECURE channel ***
James B. Byrne mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3