An Unknown Error Occurred While Validating The Server
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DNS servers are running on Windows 2008 DC. We have some DNS issues. When
An Unknown Error Occurred While Validating The Server Dns
I check the Forwarders in the DNS Manager, it shows Comcast DNS conditional forwarder an unknown error occurred "An unknown error occurred while validating the server" If I run nslookup, I get can't find web an error occurred while validating the available time for this resource site: Query refused nslookup Default Server: 2008.chicagotech.net Address: 10.0.0.17 > server 68.87.72.130 Default Server: chic-cns.area4.il.chicago.comcast.net Address: 68.87.72.130 > yahoo.com Server: chic-cns.area4.il.chicago.comcast.net Address: 68.87.72.13 *** chic-cns.area4.il.chicago.comcast.net can't find yahoo.com: Query refused
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I have opened a case with Comcast, the technician said their DNS works fine. If I test it from my home, the nslookup can query the web site uisng Comcast DNS. The Event Viewer doesn't have any error related to the DNS. How do you troubleshoot it? A: From the description, I understand the issue is that nslookup failed with
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error "query refused" and your ISP DNS server shows as "An unknown error occurred while validating the server" in DNS forwarder list. If I misunderstand, please don’t hesitate to let me know. Do you have configured a primary or secondary zone in your DNS server for comcast.net? If so, since you have already had DNS forwarder configured, you don't need to configure any zone for comcast.net, I suggest you delete it if any and test again. Also this issue could be caused by the incorrect DNS cache. I suggest you run the command below on this Windows 2008 server. Net stop netlogon net start netlogon ipconfig /flushdns ipconfig /registerdns After that, please test again. If the issue persists, please help me gather the following information: 1. Please help me gather the debug logging for DNS. a. In DNS console, right click the DNS server and go to Debug Logging tab. b. Select "Log packets for debugging" and select all the available options. c. Specify a log location. e. Reproduce the issue and gather the debug log, then disable
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Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question an error occurred while validating hresult 8001010e _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question http://www.chicagotech.net/server/dnsissue4.htm Anybody can answer The best answers are voted up and rise to the top Windows 2012 can't validate forwarders without a root zone? up vote 11 down vote favorite 1 (Disclaimer: I am not a Windows DNS admin. I do have a decent amount of DNS experience under my belt though, and this is not making any sense. I am working closely with the http://serverfault.com/questions/693670/windows-2012-cant-validate-forwarders-without-a-root-zone admins responsible for these devices and can get tests performed as needed.) We have run into an issue where we cannot add conditional forwarders that point to BIND nameservers under Windows Server 2012. Adding the IP address of the server results in a validation error: An unknown error occurred while validating the server. Looking at the query log on the BIND server, we found something rather interesting: the Windows DNS server was querying for . IN SOA, i.e. the SOA record for the root nameservers. No query for example.com. IN SOA at all. It attempts to query for root authority and doesn't continue when it receives a response of REFUSED. client 192.168.203.20#59067 (.): query: . IN SOA - (192.168.208.201) client 192.168.203.20#50553 (.): query: . IN SOA - (192.168.208.201) client 192.168.203.20#55468 (.): query: . IN SOA - (192.168.208.201) Madness. To humor it, we reproduced this problem in the lab. I downloaded a copy of the root zone and configured a . zone (commenting out my root hints), and lo and behold, this error no longer occurs. I really don't get this. I'm providing an authoritative nameserver that shouldn't have t
add the forwarder IP the error is coming, however I am able to add the same IP http://www.networksteve.com/forum/topic.php/DNS_Forwarder_-_an_unknown_error_occurred_while_validating_the_s/?TopicId=84659&Posts=1 on other DNS server, i tried to resolve the IP using nslookup on same server and it is resolving... Error Image :http://www.chicagotech.net/images/dnsissue4.jpg An unknown error occurred while validating http://www.windows-server-answers.com/microsoft/Windows-Server-DNS/34062543/forwarders-cannot-be-validated-and-recursive-query-fails.aspx the server. Need urgent h August 20th, 2015 11:42am Hi Hi_SGH, According to your description, when you add a DNS forwarder, unknown error occurs, but when you add error occurred the same IP address on other server, it works well. We may perform a network traffic capture on the server that has problem and on the server works well, compare the packets when you add a DNS forwarder. In general, when you add a forwarder, the server will query for the PTR record, then send SOA error occurred while query to the remote server. If the remote server receives the packet, it will send back response-success packet. We may check if the server with problemcould receivethe response-success packet from the remote DNS server. Besides, the result of validation doesnt affect forward function, when DNS server forwards query to the remote DNS server, it refer to the IP address of the remote server. If you want to download network monitor to perform a network traffic, you may click the following link: https://www.microsoft.com/en-us/download/details.aspx?id=4865 Best regards, Anne he Free Windows Admin Tool Kit Click here and download it now August 21st, 2015 1:23am This topic is archived. No further replies will be accepted. Other recent topics Remote Administration For Windows. Easy remote access of Windows 10, 7, 8, XP, 2008, 2000, and Vista Computers Click here to find out more Reboot Hundreds of computers, disable flash drives, deploy power managements settings. Click here to get your free copy of Network Administrator. Over 25 plugins to make your life easier
nslookup are failing on the new 2008 DC. Yes, recursion is enabled (or rather not disabled on Advanced tab). I have the same forwarders and root hints as my working 2003 DC and I can telnet to the forwarders' port 53 from the 2008 DC. Event logs show no errors. Odd thing is, when adding the forwarders, their FQDN resolved, but the Validated column said "An unknown error occurred while validating the server." Can't find anything about this message online and can't find any event, log entry, or other explanation of what this error is. Guess that's why it says "unknown error". ;) Seems obvious problem is recursion/forwarding, but I can't figure out how to diagnose the problem since recursion is already enabled. Help! Ace Fekay [Microsoft Certified Trainer] replied on 23-Feb-09 10:23 AM Bennett