Hello,
We are running bind 9.10.3-P4-Ubuntu, Ubuntu 16.04.2 LTS, we face a
recurring problem, every 3 or 4 hours Bind does not resolve the
icap-to.com.br domain.
After restarting the Bind service, resolves the host. Could someone give me
a help, I could not find if the problem is in the settings.
The server in question is a public recursive dns. Below are the settings.
named.conf.options
options {
directory "/var/cache/bind";
version "XXXX";
recursive-clients 14000;
tcp-clients 3000;
zone-statistics yes;
listen-on port 53 { any; };
listen-on-v6 port 53 { none; };
allow-query { any; };
allow-query-cache { any; };
allow-recursion { any;};
recursion yes;
minimal-responses no;
dnssec-enable no;
dnssec-validation no;
auth-nxdomain no;
query-source address XXX.XX.XXX.XXX;
max-cache-size 512M;
clients-per-query 0;
max-clients-per-query 0;
};
server 0.0.0.0/0 {
edns no;
};
root@recursivo-a:~# dig icap-to.com.br
; <<>> DiG 9.10.3-P4-Ubuntu <<>> icap-to.com.br
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 32316
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;icap-to.com.br. IN A
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 18 10:41:59 BRT 2017
;; MSG SIZE rcvd: 43
root@recursivo-a:~# /etc/init.d/bind9 restart
[ ok ] Restarting bind9 (via systemctl): bind9.service.
root@recursivo-a:~# dig icap-to.com.br
; <<>> DiG 9.10.3-P4-Ubuntu <<>> icap-to.com.br
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65065
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;icap-to.com.br. IN A
;; ANSWER SECTION:
icap-to.com.br. 14400 IN A 192.185.216.81
;; AUTHORITY SECTION:
icap-to.com.br. 86400 IN NS ns2.desenvolvesistemas.com.
icap-to.com.br. 86400 IN NS ns1.desenvolvesistemas.com.
;; Query time: 355 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 18 10:42:17 BRT 2017
;; MSG SIZE rcvd: 117
--
*Atenciosamente,*
*Filho **Arrais *
Analista de Tecnologia da Informação
MBA em Gestão de Tecnologia da Informação
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