Bind Error Unexpected Rcode Servfail
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Error Unexpected Rcode Refused
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Unexpected Rcode (servfail) From Master
Register Now If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related cookies. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Search this Thread 01-27-2010, 11:36 PM #1 Imranteli LQ Newbie Registered: Jun 2009 Posts: 10 Rep: DNS Issue [unexpected rcode (SERVFAIL)] From last few days i am gett
"error (unexpected RCODE REFUSED)" mean? Posted by Eric on 14 July 2015, 1:29 am If you're seeing this in the /var/log/syslog on rcode refused dns your BIND DNS server: Jul 14 00:56:13 kla-dns-01 named[8255]: lame server resolving bind error (unexpected RCODE REFUSED) resolving '75.1.33.112.in-addr.arpa/PTR/IN': 211.136.17.105#53 ..it means that a client has asked your
Error (formerr) Resolving
server to look up a domain name that your server didn't know about, and when it forwarded the request to it's forwarders, the remote DNS http://www.linuxquestions.org/questions/linux-newbie-8/dns-issue-%5Bunexpected-rcode-servfail-%5D-785246/ server refused to respond. A packet trace on your DNS server shows exactly what's happening: root@dns1:/# tcpdump -n -s 1514 -v 'port 53' tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 1514 bytes 00:56:09.686771 IP (tos 0x0, ttl 62, id 44942, offset 0, flags [DF], proto UDP (17), length http://www.ericshalov.com/2015/07/14/what-does-error-unexpected-rcode-refused-mean/ 70) 10.5.11.101.42237 > 10.0.10.10.53: 17985+ PTR? 75.1.33.112.in-addr.arpa. (42) ^… One of your clients sends a request to your DNS server asking for the reverse-IP request (a "PTR" request) for the domain-name corresponding to IP address 112.33.1.75 (expressed in reverse as "75.1.33.112.in-addr.arpa.") 00:56:09.687284 IP (tos 0x0, ttl 64, id 28584, offset 0, flags [none], proto UDP (17), length 81) 10.0.10.10.6374 > 10.0.0.2.53: 26305+% [1au] PTR? 75.1.33.112.in-addr.arpa. (53) ^… The DNS server forwards the reverse-IP request to it's "upstream" forwarder DNS server, 10.0.0.2. 00:56:12.218438 IP (tos 0x0, ttl 64, id 39251, offset 0, flags [none], proto UDP (17), length 81) 10.0.10.10.27738 > 211.136.20.201.53: 63185% [1au] PTR? 75.1.33.112.in-addr.arpa. (53) ^… After 3 seconds without a reply, the server sends the request to it's next forwarder, 211.136.20.201. 00:56:13.018706 IP (tos 0x0, ttl 64, id 34335, offset 0, flags [none], proto UDP (17), length 81) 10.0.10.10.37801 > 211.136.17.105.53: 55483% [1au] PTR? 75.1.33.112.in-addr.arpa
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] [ subject ] [ author ] There's more: both ns1.netbcp.com and ns2.netbcp.net don't respond to queries about nbc.com and ns1.netbcp.com doesn't respond over TCP. Frank From: bind-users-bounces+frnkblk=iname.com at lists.isc.org [mailto:bind-users-bounces+frnkblk=iname.com at lists.isc.org] On Behalf Of Kevin Darcy Sent: Friday, October 12, 2012 12:48 PM Cc: bind-users at lists.isc.org Subject: Re: error (unexpected RCODE REFUSED) resolving OK, so your nbc.com/A resolving error doesn't really have anything to do with the nameservers you included in your original post. It does appear, however, that ns2.netbcp.net (205.173.93.213) is refusing requests generally for the nbc.com domain: $ dig nbc.com +buf=4096 +norec @ns2.netbcp.net ; <<>> DiG 9.4.3-P3 <<>> nbc.com +buf=4096 +norec @ns2.netbcp.net ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 1019 ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;nbc.com. IN A ;; Query time: 30 msec ;; SERVER: 205.173.93.213#53(205.173.93.213) ;; WHEN: Fri Oct 12 13:44:56 2012 ;; MSG SIZE rcvd: 36 ns1.netbcp.com appears to be doing the same thing. Not known whether this is something temporary (performing maintenance?), or something permanent (provider's contract lapsed, but customer never updated delegations). In any case, you have enough working authoritative nameservers for the domain, so it'll continue to resolve for you... - Kevin On 10/12/2012 1:35 PM, James Tingler wrote: I don't think that I am. I only define internal forwarders for internal zones as needed. For my root hint, standard configuration: Named.conf zone "." { type hint; file "named.ca"; Named.ca: ; <<>> DiG 9.5.0b2 <<>> +bufsize=1200 +norec NS . @a.root-servers.net ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34420 ;; flags: qr aa; QUERY: 1, ANSW