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What are some likely causes to domain member PC losing contact to domain controller?
DNS lookup fails when with all the Mac workstationsMS DNS lookup issueServer 2003, XP Clients, DNS issuesDNS can't resolve hostname; nslookup canHow to configure bind9 to be a local DNS only with no internet access?Windows 2003 - dns doesn't respond to workstationsUnreliable DNS resolving for external domains using Windows Server 2008What are all the possible causes of the “An Active Directory Domain Controller (AD DC) for the domain …” error message?Bind Server issue: Can not nslookup from client when DNS Master is down, but still can connect to InternetWindows DNS server randomly responds/times out
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;
Several of our client Windows 10 client PC suddenly lost their connection to mapped drives against shared folders located on a domain controller (DC) called SBS2011 running Windows SBS Server.
I have verified that the DC can be ping (via IP & host names) from the client PC & vice versa.
NSlookup shows it cannot resolve the SBS2011 DC since :
PS C:UsersAdmin> nslookup sbs2011
Server: UnKnown
Address: 10.1.1.2
*** UnKnown can't find sbs2011: Non-existent domain
So it looks like a DNS issue to me.
Could having external DNS servers (eg. OpenDNS servers) in the DNS Scope Options (see attached) cause client PC issues in resolving IP of their local DC server ?
My initial thinking is that since the client PCs are being handed (via DHCP) DNS server settings that point to both the DC & the internet OpenDNS servers - that this would lead to the client PC trying to resolve internal name of the DC by heading out into the internet.
IPConfig /all on a client PC will show:
DHCP Enabled: Yes
IPv4 Address: 10.1.1.73(Preferred)
Subnet Mask: 255.0.0.0
Default Gateway: 10.1.1.1
DHCP Server : 10.1.1.2
DNS Servers : 10.1.1.2 | 208.67.222.222 | 208.67.220.220
enter image description here
An experienced system administrator's advice below made me think that this may be the cause :
[99.999% of the time it is an improper configuration on your network card settings, pointing to a dns server out on the web and not the dc as your dns server. also your server can only be the dns, there cannot be any internet dns servers setup on your nic cards of both the server and the workstations. the server needs to point to itself, and the workstations need to point to the server for all dns resolution. the dns service on the server will determine where to send the clients/server when it does a look up ]
windows domain-name-system
asked Apr 21 at 16:13
Tickle MeTickle Me
265
add a comment |
Several of our client Windows 10 client PC suddenly lost their connection to mapped drives against shared folders located on a domain controller (DC) called SBS2011 running Windows SBS Server.
I have verified that the DC can be ping (via IP & host names) from the client PC & vice versa.
NSlookup shows it cannot resolve the SBS2011 DC since :
PS C:UsersAdmin> nslookup sbs2011
Server: UnKnown
Address: 10.1.1.2
*** UnKnown can't find sbs2011: Non-existent domain
So it looks like a DNS issue to me.
Could having external DNS servers (eg. OpenDNS servers) in the DNS Scope Options (see attached) cause client PC issues in resolving IP of their local DC server ?
My initial thinking is that since the client PCs are being handed (via DHCP) DNS server settings that point to both the DC & the internet OpenDNS servers - that this would lead to the client PC trying to resolve internal name of the DC by heading out into the internet.
IPConfig /all on a client PC will show:
DHCP Enabled: Yes
IPv4 Address: 10.1.1.73(Preferred)
Subnet Mask: 255.0.0.0
Default Gateway: 10.1.1.1
DHCP Server : 10.1.1.2
DNS Servers : 10.1.1.2 | 208.67.222.222 | 208.67.220.220
enter image description here
An experienced system administrator's advice below made me think that this may be the cause :
[99.999% of the time it is an improper configuration on your network card settings, pointing to a dns server out on the web and not the dc as your dns server. also your server can only be the dns, there cannot be any internet dns servers setup on your nic cards of both the server and the workstations. the server needs to point to itself, and the workstations need to point to the server for all dns resolution. the dns service on the server will determine where to send the clients/server when it does a look up ]
windows domain-name-system
asked Apr 21 at 16:13
Tickle MeTickle Me
265
1
If you configure a DNS server, it will use it.
– eckes
Apr 21 at 16:31
The experienced sysadmin is correct - you cannot direct your Windows domain clients to use public DNS servers or you will cause a lot of problems for those clients.
– Todd Wilcox
Apr 22 at 13:22
@ToddWilcox - so is it best practice to avoid handing out public DNS servers via DHCP to Windows clients & instead use DNS Forwarder option to specify public DNS servers for those queries that your local DNS server are unable to resolve ?
– Tickle Me
Apr 22 at 17:41
add a comment |
Several of our client Windows 10 client PC suddenly lost their connection to mapped drives against shared folders located on a domain controller (DC) called SBS2011 running Windows SBS Server.
I have verified that the DC can be ping (via IP & host names) from the client PC & vice versa.
NSlookup shows it cannot resolve the SBS2011 DC since :
PS C:UsersAdmin> nslookup sbs2011
Server: UnKnown
Address: 10.1.1.2
*** UnKnown can't find sbs2011: Non-existent domain
So it looks like a DNS issue to me.
Could having external DNS servers (eg. OpenDNS servers) in the DNS Scope Options (see attached) cause client PC issues in resolving IP of their local DC server ?
My initial thinking is that since the client PCs are being handed (via DHCP) DNS server settings that point to both the DC & the internet OpenDNS servers - that this would lead to the client PC trying to resolve internal name of the DC by heading out into the internet.
IPConfig /all on a client PC will show:
DHCP Enabled: Yes
IPv4 Address: 10.1.1.73(Preferred)
Subnet Mask: 255.0.0.0
Default Gateway: 10.1.1.1
DHCP Server : 10.1.1.2
DNS Servers : 10.1.1.2 | 208.67.222.222 | 208.67.220.220
enter image description here
An experienced system administrator's advice below made me think that this may be the cause :
[99.999% of the time it is an improper configuration on your network card settings, pointing to a dns server out on the web and not the dc as your dns server. also your server can only be the dns, there cannot be any internet dns servers setup on your nic cards of both the server and the workstations. the server needs to point to itself, and the workstations need to point to the server for all dns resolution. the dns service on the server will determine where to send the clients/server when it does a look up ]
windows domain-name-system
asked Apr 21 at 16:13
Tickle MeTickle Me
265
Several of our client Windows 10 client PC suddenly lost their connection to mapped drives against shared folders located on a domain controller (DC) called SBS2011 running Windows SBS Server.
I have verified that the DC can be ping (via IP & host names) from the client PC & vice versa.
NSlookup shows it cannot resolve the SBS2011 DC since :
PS C:UsersAdmin> nslookup sbs2011
Server: UnKnown
Address: 10.1.1.2
*** UnKnown can't find sbs2011: Non-existent domain
So it looks like a DNS issue to me.
Could having external DNS servers (eg. OpenDNS servers) in the DNS Scope Options (see attached) cause client PC issues in resolving IP of their local DC server ?
My initial thinking is that since the client PCs are being handed (via DHCP) DNS server settings that point to both the DC & the internet OpenDNS servers - that this would lead to the client PC trying to resolve internal name of the DC by heading out into the internet.
IPConfig /all on a client PC will show:
DHCP Enabled: Yes
IPv4 Address: 10.1.1.73(Preferred)
Subnet Mask: 255.0.0.0
Default Gateway: 10.1.1.1
DHCP Server : 10.1.1.2
DNS Servers : 10.1.1.2 | 208.67.222.222 | 208.67.220.220
enter image description here
An experienced system administrator's advice below made me think that this may be the cause :
[99.999% of the time it is an improper configuration on your network card settings, pointing to a dns server out on the web and not the dc as your dns server. also your server can only be the dns, there cannot be any internet dns servers setup on your nic cards of both the server and the workstations. the server needs to point to itself, and the workstations need to point to the server for all dns resolution. the dns service on the server will determine where to send the clients/server when it does a look up ]
windows domain-name-system
windows domain-name-system
asked Apr 21 at 16:13
Tickle MeTickle Me
265
asked Apr 21 at 16:13
Tickle MeTickle Me
265
edited Apr 21 at 16:20
Tickle Me
asked Apr 21 at 16:13
Tickle MeTickle Me
265
asked Apr 21 at 16:13
Tickle MeTickle Me
265
asked Apr 21 at 16:13
Tickle MeTickle Me
265
265
1
If you configure a DNS server, it will use it.
– eckes
Apr 21 at 16:31
The experienced sysadmin is correct - you cannot direct your Windows domain clients to use public DNS servers or you will cause a lot of problems for those clients.
– Todd Wilcox
Apr 22 at 13:22
@ToddWilcox - so is it best practice to avoid handing out public DNS servers via DHCP to Windows clients & instead use DNS Forwarder option to specify public DNS servers for those queries that your local DNS server are unable to resolve ?
– Tickle Me
Apr 22 at 17:41
add a comment |
1
If you configure a DNS server, it will use it.
– eckes
Apr 21 at 16:31
The experienced sysadmin is correct - you cannot direct your Windows domain clients to use public DNS servers or you will cause a lot of problems for those clients.
– Todd Wilcox
Apr 22 at 13:22
@ToddWilcox - so is it best practice to avoid handing out public DNS servers via DHCP to Windows clients & instead use DNS Forwarder option to specify public DNS servers for those queries that your local DNS server are unable to resolve ?
– Tickle Me
Apr 22 at 17:41
1
1
If you configure a DNS server, it will use it.
– eckes
Apr 21 at 16:31
If you configure a DNS server, it will use it.
– eckes
Apr 21 at 16:31
The experienced sysadmin is correct - you cannot direct your Windows domain clients to use public DNS servers or you will cause a lot of problems for those clients.
– Todd Wilcox
Apr 22 at 13:22
The experienced sysadmin is correct - you cannot direct your Windows domain clients to use public DNS servers or you will cause a lot of problems for those clients.
– Todd Wilcox
Apr 22 at 13:22
@ToddWilcox - so is it best practice to avoid handing out public DNS servers via DHCP to Windows clients & instead use DNS Forwarder option to specify public DNS servers for those queries that your local DNS server are unable to resolve ?
– Tickle Me
Apr 22 at 17:41
@ToddWilcox - so is it best practice to avoid handing out public DNS servers via DHCP to Windows clients & instead use DNS Forwarder option to specify public DNS servers for those queries that your local DNS server are unable to resolve ?
– Tickle Me
Apr 22 at 17:41
add a comment |
2 Answers
2
active
oldest
votes
The best method is to set the DNS to just the DC in the clients, and to set your DNS fowarder with the public’s one.
The way DNS work is not at 100% like you wrote, as the PC will use its first DNS resolver for all query, if the DNS don’t answer, because the server is off or other reasons, the PC switch to the other DNS server listed and will stick to it, and will use that one unless it fail too.
So as you can guess if the PC use the public DNS, all your domain query will fail as unknown, but the PC don’t try on the other DNS, as it got an answer, an unknown answer, but he got one.
answered Apr 21 at 16:33
yagmoth555♦yagmoth555
12.4k31842
Presumably to allow some redundancy you could add multiple DCs as DNS servers?
– Harry Johnston
Apr 22 at 2:23
@yagmoth555 - if I remove the 2 OpenDNS servers from the DHCP Scope Options so that the client PC get assigned just the DC only, where do I specify the OpenDNS servers so that the DNS service can forward all external queries ?
– Tickle Me
Apr 22 at 6:21
@TickleMe In your DNS console in sbs2011, right click your server name and click option, forwarder will be listed there. Check there for example; mcmcse.com/microsoft/guides/70-410/dns_forwarding.shtml, the first picture is where the forwarder are configured
– yagmoth555♦
Apr 22 at 10:49
add a comment |
You should never use external DNS, but the actual problem here is your DC/DNS server is either not responding or no longer has a record registered for SBS2011.
Sometimes when a DC crashes, the DNS server may no longer be listening on the specified IP address. This would be in dnsmgmt.msc, server properties > Interfaces > Listen on. If this occurs, the DC may unregister it's own A record.
answered 2 days ago
Greg AskewGreg Askew
29.3k33770
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
The best method is to set the DNS to just the DC in the clients, and to set your DNS fowarder with the public’s one.
The way DNS work is not at 100% like you wrote, as the PC will use its first DNS resolver for all query, if the DNS don’t answer, because the server is off or other reasons, the PC switch to the other DNS server listed and will stick to it, and will use that one unless it fail too.
So as you can guess if the PC use the public DNS, all your domain query will fail as unknown, but the PC don’t try on the other DNS, as it got an answer, an unknown answer, but he got one.
answered Apr 21 at 16:33
yagmoth555♦yagmoth555
12.4k31842
Presumably to allow some redundancy you could add multiple DCs as DNS servers?
– Harry Johnston
Apr 22 at 2:23
@yagmoth555 - if I remove the 2 OpenDNS servers from the DHCP Scope Options so that the client PC get assigned just the DC only, where do I specify the OpenDNS servers so that the DNS service can forward all external queries ?
– Tickle Me
Apr 22 at 6:21
@TickleMe In your DNS console in sbs2011, right click your server name and click option, forwarder will be listed there. Check there for example; mcmcse.com/microsoft/guides/70-410/dns_forwarding.shtml, the first picture is where the forwarder are configured
– yagmoth555♦
Apr 22 at 10:49
add a comment |
The best method is to set the DNS to just the DC in the clients, and to set your DNS fowarder with the public’s one.
The way DNS work is not at 100% like you wrote, as the PC will use its first DNS resolver for all query, if the DNS don’t answer, because the server is off or other reasons, the PC switch to the other DNS server listed and will stick to it, and will use that one unless it fail too.
So as you can guess if the PC use the public DNS, all your domain query will fail as unknown, but the PC don’t try on the other DNS, as it got an answer, an unknown answer, but he got one.
answered Apr 21 at 16:33
yagmoth555♦yagmoth555
12.4k31842
Presumably to allow some redundancy you could add multiple DCs as DNS servers?
– Harry Johnston
Apr 22 at 2:23
@yagmoth555 - if I remove the 2 OpenDNS servers from the DHCP Scope Options so that the client PC get assigned just the DC only, where do I specify the OpenDNS servers so that the DNS service can forward all external queries ?
– Tickle Me
Apr 22 at 6:21
@TickleMe In your DNS console in sbs2011, right click your server name and click option, forwarder will be listed there. Check there for example; mcmcse.com/microsoft/guides/70-410/dns_forwarding.shtml, the first picture is where the forwarder are configured
– yagmoth555♦
Apr 22 at 10:49
add a comment |
The best method is to set the DNS to just the DC in the clients, and to set your DNS fowarder with the public’s one.
The way DNS work is not at 100% like you wrote, as the PC will use its first DNS resolver for all query, if the DNS don’t answer, because the server is off or other reasons, the PC switch to the other DNS server listed and will stick to it, and will use that one unless it fail too.
So as you can guess if the PC use the public DNS, all your domain query will fail as unknown, but the PC don’t try on the other DNS, as it got an answer, an unknown answer, but he got one.
answered Apr 21 at 16:33
yagmoth555♦yagmoth555
12.4k31842
The best method is to set the DNS to just the DC in the clients, and to set your DNS fowarder with the public’s one.
The way DNS work is not at 100% like you wrote, as the PC will use its first DNS resolver for all query, if the DNS don’t answer, because the server is off or other reasons, the PC switch to the other DNS server listed and will stick to it, and will use that one unless it fail too.
So as you can guess if the PC use the public DNS, all your domain query will fail as unknown, but the PC don’t try on the other DNS, as it got an answer, an unknown answer, but he got one.
answered Apr 21 at 16:33
yagmoth555♦yagmoth555
12.4k31842
answered Apr 21 at 16:33
yagmoth555♦yagmoth555
12.4k31842
answered Apr 21 at 16:33
yagmoth555♦yagmoth555
12.4k31842
answered Apr 21 at 16:33
yagmoth555♦yagmoth555
12.4k31842
12.4k31842
Presumably to allow some redundancy you could add multiple DCs as DNS servers?
– Harry Johnston
Apr 22 at 2:23
@yagmoth555 - if I remove the 2 OpenDNS servers from the DHCP Scope Options so that the client PC get assigned just the DC only, where do I specify the OpenDNS servers so that the DNS service can forward all external queries ?
– Tickle Me
Apr 22 at 6:21
@TickleMe In your DNS console in sbs2011, right click your server name and click option, forwarder will be listed there. Check there for example; mcmcse.com/microsoft/guides/70-410/dns_forwarding.shtml, the first picture is where the forwarder are configured
– yagmoth555♦
Apr 22 at 10:49
add a comment |
Presumably to allow some redundancy you could add multiple DCs as DNS servers?
– Harry Johnston
Apr 22 at 2:23
@yagmoth555 - if I remove the 2 OpenDNS servers from the DHCP Scope Options so that the client PC get assigned just the DC only, where do I specify the OpenDNS servers so that the DNS service can forward all external queries ?
– Tickle Me
Apr 22 at 6:21
@TickleMe In your DNS console in sbs2011, right click your server name and click option, forwarder will be listed there. Check there for example; mcmcse.com/microsoft/guides/70-410/dns_forwarding.shtml, the first picture is where the forwarder are configured
– yagmoth555♦
Apr 22 at 10:49
Presumably to allow some redundancy you could add multiple DCs as DNS servers?
– Harry Johnston
Apr 22 at 2:23
Presumably to allow some redundancy you could add multiple DCs as DNS servers?
– Harry Johnston
Apr 22 at 2:23
@yagmoth555 - if I remove the 2 OpenDNS servers from the DHCP Scope Options so that the client PC get assigned just the DC only, where do I specify the OpenDNS servers so that the DNS service can forward all external queries ?
– Tickle Me
Apr 22 at 6:21
@yagmoth555 - if I remove the 2 OpenDNS servers from the DHCP Scope Options so that the client PC get assigned just the DC only, where do I specify the OpenDNS servers so that the DNS service can forward all external queries ?
– Tickle Me
Apr 22 at 6:21
@TickleMe In your DNS console in sbs2011, right click your server name and click option, forwarder will be listed there. Check there for example; mcmcse.com/microsoft/guides/70-410/dns_forwarding.shtml, the first picture is where the forwarder are configured
– yagmoth555♦
Apr 22 at 10:49
@TickleMe In your DNS console in sbs2011, right click your server name and click option, forwarder will be listed there. Check there for example; mcmcse.com/microsoft/guides/70-410/dns_forwarding.shtml, the first picture is where the forwarder are configured
– yagmoth555♦
Apr 22 at 10:49
add a comment |
You should never use external DNS, but the actual problem here is your DC/DNS server is either not responding or no longer has a record registered for SBS2011.
Sometimes when a DC crashes, the DNS server may no longer be listening on the specified IP address. This would be in dnsmgmt.msc, server properties > Interfaces > Listen on. If this occurs, the DC may unregister it's own A record.
answered 2 days ago
Greg AskewGreg Askew
29.3k33770
add a comment |
You should never use external DNS, but the actual problem here is your DC/DNS server is either not responding or no longer has a record registered for SBS2011.
Sometimes when a DC crashes, the DNS server may no longer be listening on the specified IP address. This would be in dnsmgmt.msc, server properties > Interfaces > Listen on. If this occurs, the DC may unregister it's own A record.
answered 2 days ago
Greg AskewGreg Askew
29.3k33770
add a comment |
You should never use external DNS, but the actual problem here is your DC/DNS server is either not responding or no longer has a record registered for SBS2011.
Sometimes when a DC crashes, the DNS server may no longer be listening on the specified IP address. This would be in dnsmgmt.msc, server properties > Interfaces > Listen on. If this occurs, the DC may unregister it's own A record.
answered 2 days ago
Greg AskewGreg Askew
29.3k33770
You should never use external DNS, but the actual problem here is your DC/DNS server is either not responding or no longer has a record registered for SBS2011.
Sometimes when a DC crashes, the DNS server may no longer be listening on the specified IP address. This would be in dnsmgmt.msc, server properties > Interfaces > Listen on. If this occurs, the DC may unregister it's own A record.
answered 2 days ago
Greg AskewGreg Askew
29.3k33770
answered 2 days ago
Greg AskewGreg Askew
29.3k33770
answered 2 days ago
Greg AskewGreg Askew
29.3k33770
answered 2 days ago
Greg AskewGreg Askew
29.3k33770
29.3k33770
add a comment |
add a comment |
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1
If you configure a DNS server, it will use it.
– eckes
Apr 21 at 16:31
The experienced sysadmin is correct - you cannot direct your Windows domain clients to use public DNS servers or you will cause a lot of problems for those clients.
– Todd Wilcox
Apr 22 at 13:22
@ToddWilcox - so is it best practice to avoid handing out public DNS servers via DHCP to Windows clients & instead use DNS Forwarder option to specify public DNS servers for those queries that your local DNS server are unable to resolve ?
– Tickle Me
Apr 22 at 17:41