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I'm encountering very strange issue with my DNS server, which is set up to forward requests for a specific domain to another DNS server. After restarting named I'm able to resolve hostnames, but after some time forwarding stops working. Another restart helps. I've tried versions 9.8.2 and 9.10 - it works the same.
named.conf:
options {
#listen-on port 53 { 127.0.0.1; };
#listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
allow-query { any; };
allow-query-cache { any; };
allow-transfer { any; };
allow-recursion { any; };
recursion yes;
dnssec-enable no;
dnssec-validation no;
dnssec-lookaside auto;
/* Path to ISC DLV key */
bindkeys-file "/etc/named.iscdlv.key";
managed-keys-directory "/var/named/dynamic";
};
zone "video54.local" IN {
type forward;
forwarders { 172.21.2.1; };
};
zone "idc.local" IN {
type master;
file "dynamic/idc.local.db";
allow-update { key "idc.local."; };
};
dig, when DNS stops resolving:
dig @127.0.0.1 idc-git.video54.local
; <<>> DiG 9.10.0-RedHat-9.10.0-0.el6 <<>> @127.0.0.1 idc-git.video54.local
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 21317
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;idc-git.video54.local. IN A
;; AUTHORITY SECTION:
. 10374 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2014072100 1800 900 604800 86400
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon Jul 21 12:44:38 IDT 2014
;; MSG SIZE rcvd: 125
dig again, after restart:
dig @127.0.0.1 idc-git.video54.local
; <<>> DiG 9.10.0-RedHat-9.10.0-0.el6 <<>> @127.0.0.1 idc-git.video54.local
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55990
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;idc-git.video54.local. IN A
;; ANSWER SECTION:
idc-git.video54.local. 3600 IN A 172.21.3.33
;; Query time: 2 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon Jul 21 12:44:56 IDT 2014
;; MSG SIZE rcvd: 66
Can you please tell me what's wrong?
Thanks!