Dns Forwarder An Unknown Error Occurred
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DNS servers are running on Windows 2008 DC. We have some DNS issues. When I check the Forwarders in the DNS Manager, it shows Comcast DNS "An unknown error edit forwarders an unknown error occurred occurred while validating the server" If I run nslookup, I get can't find zone transfer an unknown error occurred web 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: windows dns validation error 68.87.72.13 *** chic-cns.area4.il.chicago.comcast.net can't find yahoo.com: Query refused 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 conditional forwarder an unknown error occurred 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 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
An Unknown Error Occurred May Be Dns Error
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 the debug logging. 2. Please collect MPS report on the server (PFE version) for the analyzing. The MPS Reporting Tool is utilized to gather detailed information regarding a systems current configuration. The data collected will assist me with fault isolation. ===================== a. Please download MPS Reporting Tool from the following link: (http://www.microsoft.com/downloads/details.aspx?FamilyID=00ad0eac-720f-4441-9ef6-ea9f657b5c2f&DisplayLang=en) NOTE: The link may be truncated when you read the E-mail. Be sure to include all text between '(' and ')' when navigating to the download location. b. Right click MPSRPT_PFE.EXE and select Run as Ad
add the forwarder IP the error is coming, however I am able to add the same IP
Dns Forwarder Best Practices
on other DNS server, i tried to resolve the IP using dns forwarder linux nslookup on same server and it is resolving... Error Image :http://www.chicagotech.net/images/dnsissue4.jpg An unknown error occurred while validating dns forwarder pfsense 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 http://www.chicagotech.net/server/dnsissue4.htm 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 http://www.networksteve.com/forum/topic.php/DNS_Forwarder_-_an_unknown_error_occurred_while_validating_the_s/?TopicId=84659&Posts=1 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
also has style CCTV Storage CCTV System Upgrade for a Police Department Meru Wireless ROLLOUT!!! Start Deploying a Wireless Infrastructure where currently it is non-existent and build from that point to the future. TECHNOLOGY IN THIS DISCUSSION Join the https://community.spiceworks.com/topic/395860-dns-forwarders-not-validating Community! Creating your account only takes a few minutes. Join Now So I come in the office this morning, ran a reboot on the server for updates and now no matter what ones I add the DNS forwarders do https://groups.google.com/d/msg/microsoft.public.windows.server.dns/fAVIIDudPjs/D_wexl2IzhAJ not validate. This is when you right click properties on the DNS server then edit forwarders. Even the router wont resolve. Server is SBS2011 router is PFSense Reply Subscribe View Best Answer RELATED TOPICS: DNS Forwarders DNS Forwarders DNS an unknown Forwarders Randomly Stop Working   15 Replies Mace OP Martin2012 Oct 17, 2013 at 10:41 UTC which forwarders you using opendns (208.67.222.222, 208.67.220.220) , google (8.8.8.8 and 8.8.4.4) , your ISPs or something else? can you ping anything outside your network by ip-address (eg the forwarders above) 0 Serrano OP Rhys Hudson Oct 17, 2013 at 10:48 UTC outside access works. I can go to websites with ip address. I have tried my an unknown error router, google and opendns. all the same. 0 Mace OP Martin2012 Oct 17, 2013 at 10:53 UTC have you run nslookup independantly against googles dns??  nslookup www.bbc.co.uk 8.8.8.8  Is the firewall running a DNS proxy at all? 0 Mace OP Martin2012 Oct 17, 2013 at 10:57 UTC also when you say internal router I presume you mean firewall  so nslooup firewall and nslookup firewall.domain.local dont work either? 0 Serrano OP Rhys Hudson Oct 17, 2013 at 10:58 UTC it says: TextDNS request timed out. timeout was 2 seconds. server:unknown address: 8.8.8.8 DNS request timed out. timeout was 2 seconds. DNS request timed out. timeout was 2 seconds. DNS request timed out. timeout was 2 seconds. DNS request timed out. timeout was 2 seconds. *** Request to unknown timed-out  0 Serrano OP Rhys Hudson Oct 17, 2013 at 11:22 UTC its a firewall and a router. pfsense. 10.0.16.1. I tried that too. 0 Mace OP Martin2012 Oct 17, 2013 at 11:30 UTC server unknown??? should be 8.8.8.8 not looking for that as the address??? whats the DNS server setting to on your interface setting? 0 Serrano OP Rhys Hudson Oct 17, 2013 at 11:41 UTC I dont know what you mean. 0 Mace OP Martin2012 Oct 17, 2013 at 11:53 UT
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