nslookup fails to resolve local DNS

nslookup fails to resolve local DNS

Post by DrBo » Thu, 13 Jul 2006 02:29:02



Hi,

My customer is having problems sending e-mail to AOL and one client.  The
client has traced the problem to reverse dns.  So I logged onto my customer's
SBS 2003 server and did an nslookup.  I found the IP address doesn't resolve
the DNS server name.  I have looked over DNS, found no issues that I could
see.  I restarted the server with no change.  What do I do next to get the
nslookup to recognize the DNS server?

Thanks,

Dr. Bob

 
 
 

nslookup fails to resolve local DNS

Post by SBS-MV » Thu, 13 Jul 2006 15:12:37


how many nics?
please post the results of running IPCONFIG /all on the server

--
Cris Hanna [SBS-MVP]
--------------------------------------
Please do not respond directly to me, but only post in the newsgroup so all can take advantage

  Hi,

  My customer is having problems sending e-mail to AOL and one client.  The
  client has traced the problem to reverse dns.  So I logged onto my customer's
  SBS 2003 server and did an nslookup.  I found the IP address doesn't resolve
  the DNS server name.  I have looked over DNS, found no issues that I could
  see.  I restarted the server with no change.  What do I do next to get the
  nslookup to recognize the DNS server?

  Thanks,

  Dr. Bob

 
 
 

nslookup fails to resolve local DNS

Post by DrBo » Fri, 14 Jul 2006 05:35:01


Hi Cris,

The SBS 2003 server is running ISA with a local NIC and an Internet NIC.  
The Internet NIC is behing a 2 Wire Firewall.  

My main concern is that nslookup isn't resolving the local DNS server.

Thanks

Dr. Bob


> how many nics?
> please post the results of running IPCONFIG /all on the server

> --
> Cris Hanna [SBS-MVP]
> --------------------------------------
> Please do not respond directly to me, but only post in the newsgroup so all can take advantage

>   Hi,

>   My customer is having problems sending e-mail to AOL and one client.  The
>   client has traced the problem to reverse dns.  So I logged onto my customer's
>   SBS 2003 server and did an nslookup.  I found the IP address doesn't resolve
>   the DNS server name.  I have looked over DNS, found no issues that I could
>   see.  I restarted the server with no change.  What do I do next to get the
>   nslookup to recognize the DNS server?

>   Thanks,

>   Dr

 
 
 

nslookup fails to resolve local DNS

Post by DrBo » Sat, 15 Jul 2006 01:38:02


Hi Cris again,
I think I figured out how to post the ipconfig /all info.

Windows IP Configuration

   Host Name . . . . . . . . . . . . : NTSERVER

   Primary Dns Suffix  . . . . . . . : PROMFG.local

   Node Type . . . . . . . . . . . . : Unknown

   IP Routing Enabled. . . . . . . . : Yes

   WINS Proxy Enabled. . . . . . . . : Yes

   DNS Suffix Search List. . . . . . : PROMFG.local

                                       sbcglobal.net

Ethernet adapter Server Local Area Connection:

   Connection-specific DNS Suffix  . :

   Description . . . . . . . . . . . : HP NC7760 Gigabit Server Adapter

   Physical Address. . . . . . . . . : 00-0B-CD-CB-A1-8C

   DHCP Enabled. . . . . . . . . . . : No

   IP Address. . . . . . . . . . . . : 192.168.16.2

   Subnet Mask . . . . . . . . . . . : 255.255.255.0

   Default Gateway . . . . . . . . . :

   DNS Servers . . . . . . . . . . . : 192.168.16.2

   Primary WINS Server . . . . . . . : 192.168.16.2

Ethernet adapter Network Connection:

   Connection-specific DNS Suffix  . : sbcglobal.net

   Description . . . . . . . . . . . : Intel(R) PRO/100 S Desktop Adapter

   Physical Address. . . . . . . . . : 00-02-B3-C9-86-94

   DHCP Enabled. . . . . . . . . . . : No

   IP Address. . . . . . . . . . . . : 68.121.252.137

   Subnet Mask . . . . . . . . . . . : 255.255.255.248

   Default Gateway . . . . . . . . . : 68.121.252.142

   DNS Servers . . . . . . . . . . . : 192.168.16.2

   NetBIOS over Tcpip. . . . . . . . : Disabled

What do you think?

Thanks

Dr. Bob


> how many nics?
> please post the results of running IPCONFIG /all on the server

> --
> Cris Hanna [SBS-MVP]
> --------------------------------------
> Please do not respond directly to me, but only post in the newsgroup so all can take advantage

>   Hi,

>   My customer is having problems sending e-mail to AOL and one client.  The
>   client has traced the problem to reverse dns.  So I logged onto my customer's
>   SBS 2003 server and did an nslookup.  I found the IP address doesn't resolve
>   the DNS server name.  I have looked over DNS, found no issues that I could
>   see.  I restarted the server with no change.  What do I do next to get the
>   nslookup to recognize the DNS server?

>   Thanks,

>   Dr

 
 
 

nslookup fails to resolve local DNS

Post by SBS-MV » Sat, 15 Jul 2006 11:28:56


for some reason the external nic is picking up the external domain and it should not be

Look at the properties of the external nic

the only thing that should be checked should be TCP/IP   Not Client for Microsoft Networks, Not file and printer sharing

Can you confirm that to be the case?

--
Cris Hanna [SBS-MVP]
--------------------------------------
Please do not respond directly to me, but only post in the newsgroup so all can take advantage

  Hi Cris again,
  I think I figured out how to post the ipconfig /all info.

  Windows IP Configuration

     Host Name . . . . . . . . . . . . : NTSERVER

     Primary Dns Suffix  . . . . . . . : PROMFG.local

     Node Type . . . . . . . . . . . . : Unknown

     IP Routing Enabled. . . . . . . . : Yes

     WINS Proxy Enabled. . . . . . . . : Yes

     DNS Suffix Search List. . . . . . : PROMFG.local

                                         sbcglobal.net

  Ethernet adapter Server Local Area Connection:

     Connection-specific DNS Suffix  . :

     Description . . . . . . . . . . . : HP NC7760 Gigabit Server Adapter

     Physical Address. . . . . . . . . : 00-0B-CD-CB-A1-8C

     DHCP Enabled. . . . . . . . . . . : No

     IP Address. . . . . . . . . . . . : 192.168.16.2

     Subnet Mask . . . . . . . . . . . : 255.255.255.0

     Default Gateway . . . . . . . . . :

     DNS Servers . . . . . . . . . . . : 192.168.16.2

     Primary WINS Server . . . . . . . : 192.168.16.2

  Ethernet adapter Network Connection:

     Connection-specific DNS Suffix  . : sbcglobal.net

     Description . . . . . . . . . . . : Intel(R) PRO/100 S Desktop Adapter

     Physical Address. . . . . . . . . : 00-02-B3-C9-86-94

     DHCP Enabled. . . . . . . . . . . : No

     IP Address. . . . . . . . . . . . : 68.121.252.137

     Subnet Mask . . . . . . . . . . . : 255.255.255.248

     Default Gateway . . . . . . . . . : 68.121.252.142

     DNS Servers . . . . . . . . . . . : 192.168.16.2

     NetBIOS over Tcpip. . . . . . . . : Disabled

  What do you think?

  Thanks

  Dr. Bob


  > how many nics?
  > please post the results of running IPCONFIG /all on the server
  >
  > --
  > Cris Hanna [SBS-MVP]
  > --------------------------------------
  > Please do not respond directly to me, but only post in the newsgroup so all can take advantage

  >   Hi,
  >
  >   My customer is having problems sending e-mail to AOL and one client.  The
  >   client has traced the problem to reverse dns.  So I logged onto my customer's
  >   SBS 2003 server and did an nslookup.  I found the IP address doesn't resolve
  >   the DNS server name.  I have looked over DNS, found no issues that I could
  >   see.  I restarted the server with no change.  What do I do next to get the
  >   nslookup to recognize the DNS server?
  >
  >   Thanks,
  >
  >   Dr

 
 
 

nslookup fails to resolve local DNS

Post by DrBo » Mon, 17 Jul 2006 02:00:03


Hi Cris,

I turned the 2 wire firewall completely on and was able to get the
customer's primary send e-mail to work.  Still on AOL mail.  Unfortunately,
nslookup still doesn't work and now I can't use terminal services to access
their server.

Next week will change back to terminal services and look at the Internet
NIC.  I looked at my own Internet NIC and found all of the services you
mentioned were on and still could get nslookup to resolve the server.

Thanks,

Dr. Bob


> for some reason the external nic is picking up the external domain and it should not be

> Look at the properties of the external nic

> the only thing that should be checked should be TCP/IP   Not Client for Microsoft Networks, Not file and printer sharing

> Can you confirm that to be the case?

> --
> Cris Hanna [SBS-MVP]
> --------------------------------------
> Please do not respond directly to me, but only post in the newsgroup so all can take advantage

>   Hi Cris again,
>   I think I figured out how to post the ipconfig /all info.

>   Windows IP Configuration

>      Host Name . . . . . . . . . . . . : NTSERVER

>      Primary Dns Suffix  . . . . . . . : PROMFG.local

>      Node Type . . . . . . . . . . . . : Unknown

>      IP Routing Enabled. . . . . . . . : Yes

>      WINS Proxy Enabled. . . . . . . . : Yes

>      DNS Suffix Search List. . . . . . : PROMFG.local

>                                          sbcglobal.net

>   Ethernet adapter Server Local Area Connection:

>      Connection-specific DNS Suffix  . :

>      Description . . . . . . . . . . . : HP NC7760 Gigabit Server Adapter

>      Physical Address. . . . . . . . . : 00-0B-CD-CB-A1-8C

>      DHCP Enabled. . . . . . . . . . . : No

>      IP Address. . . . . . . . . . . . : 192.168.16.2

>      Subnet Mask . . . . . . . . . . . : 255.255.255.0

>      Default Gateway . . . . . . . . . :

>      DNS Servers . . . . . . . . . . . : 192.168.16.2

>      Primary WINS Server . . . . . . . : 192.168.16.2

>   Ethernet adapter Network Connection:

>      Connection-specific DNS Suffix  . : sbcglobal.net

>      Description . . . . . . . . . . . : Intel(R) PRO/100 S Desktop Adapter

>      Physical Address. . . . . . . . . : 00-02-B3-C9-86-94

>      DHCP Enabled. . . . . . . . . . . : No

>      IP Address. . . . . . . . . . . . : 68.121.252.137

>      Subnet Mask . . . . . . . . . . . : 255.255.255.248

>      Default Gateway . . . . . . . . . : 68.121.252.142

>      DNS Servers . . . . . . . . . . . : 192.168.16.2

>      NetBIOS over Tcpip. . . . . . . . : Disabled

>   What do you think?

>   Thanks

>   Dr. Bob


>   > how many nics?
>   > please post the results of running IPCONFIG /all on the server

>   > --
>   > Cris Hanna [SBS-MVP]
>   > --------------------------------------
>   > Please do not respond directly to me, but only post in the newsgroup so all can take advantage

>   >   Hi,

>   >   My customer is having problems sending e-mail to AOL and one client.  The
>   >   client has traced the problem to reverse dns.  So I logged onto my customer's
>   >   SBS 2003 server and did an nslookup.  I found the IP address doesn't resolve
>   >   the DNS server name.  I have looked over DNS, found no issues that I could
>   >   see.  I restarted the server with no change.  What do I do next to get the
>   >   nslookup to recognize the DNS server?

>   >   Thanks,

>   >   Dr

 
 
 

nslookup fails to resolve local DNS

Post by SBS-MV » Mon, 17 Jul 2006 03:13:32


you mention the 2 wire firewall
Are they using SBC-Yahoo Residential DSL???

--
Cris Hanna [SBS-MVP]
--------------------------------------
Please do not respond directly to me, but only post in the newsgroup so all can take advantage

  Hi Cris,

  I turned the 2 wire firewall completely on and was able to get the
  customer's primary send e-mail to work.  Still on AOL mail.  Unfortunately,
  nslookup still doesn't work and now I can't use terminal services to access
  their server.

  Next week will change back to terminal services and look at the Internet
  NIC.  I looked at my own Internet NIC and found all of the services you
  mentioned were on and still could get nslookup to resolve the server.

  Thanks,

  Dr. Bob


  > for some reason the external nic is picking up the external domain and it should not be
  >
  > Look at the properties of the external nic
  >
  > the only thing that should be checked should be TCP/IP   Not Client for Microsoft Networks, Not file and printer sharing
  >
  > Can you confirm that to be the case?
  >
  > --
  > Cris Hanna [SBS-MVP]
  > --------------------------------------
  > Please do not respond directly to me, but only post in the newsgroup so all can take advantage

  >   Hi Cris again,
  >   I think I figured out how to post the ipconfig /all info.
  >
  >   Windows IP Configuration
  >
  >
  >
  >      Host Name . . . . . . . . . . . . : NTSERVER
  >
  >      Primary Dns Suffix  . . . . . . . : PROMFG.local
  >
  >      Node Type . . . . . . . . . . . . : Unknown
  >
  >      IP Routing Enabled. . . . . . . . : Yes
  >
  >      WINS Proxy Enabled. . . . . . . . : Yes
  >
  >      DNS Suffix Search List. . . . . . : PROMFG.local
  >
  >                                          sbcglobal.net
  >
  >
  >
  >   Ethernet adapter Server Local Area Connection:
  >
  >
  >
  >      Connection-specific DNS Suffix  . :
  >
  >      Description . . . . . . . . . . . : HP NC7760 Gigabit Server Adapter
  >
  >      Physical Address. . . . . . . . . : 00-0B-CD-CB-A1-8C
  >
  >      DHCP Enabled. . . . . . . . . . . : No
  >
  >      IP Address. . . . . . . . . . . . : 192.168.16.2
  >
  >      Subnet Mask . . . . . . . . . . . : 255.255.255.0
  >
  >      Default Gateway . . . . . . . . . :
  >
  >      DNS Servers . . . . . . . . . . . : 192.168.16.2
  >
  >      Primary WINS Server . . . . . . . : 192.168.16.2
  >
  >
  >
  >   Ethernet adapter Network Connection:
  >
  >
  >
  >      Connection-specific DNS Suffix  . : sbcglobal.net
  >
  >      Description . . . . . . . . . . . : Intel(R) PRO/100 S Desktop Adapter
  >
  >      Physical Address. . . . . . . . . : 00-02-B3-C9-86-94
  >
  >      DHCP Enabled. . . . . . . . . . . : No
  >
  >      IP Address. . . . . . . . . . . . : 68.121.252.137
  >
  >      Subnet Mask . . . . . . . . . . . : 255.255.255.248
  >
  >      Default Gateway . . . . . . . . . : 68.121.252.142
  >
  >      DNS Servers . . . . . . . . . . . : 192.168.16.2
  >
  >      NetBIOS over Tcpip. . . . . . . . : Disabled
  >
  >   What do you think?
  >
  >   Thanks
  >
  >   Dr. Bob
  >

  >
  >   > how many nics?
  >   > please post the results of running IPCONFIG /all on the server
  >   >
  >   > --
  >   > Cris Hanna [SBS-MVP]
  >   > --------------------------------------
  >   > Please do not respond directly to me, but only post in the newsgroup so all can take advantage

  >   >   Hi,
  >   >
  >   >   My customer is having problems sending e-mail to AOL and one client.  The
  >   >   client has traced the problem to reverse dns.  So I logged onto my customer's
  >   >   SBS 2003 server and did an nslookup.  I found the IP address doesn't resolve
  >   >   the DNS server name.  I have looked over DNS, found no issues that I could
  >   >   see.  I restarted the server with no change.  What do I do next to get the
  >   >   nslookup to recognize the DNS server?
  >   >
  >   >   Thanks,
  >   >
  >   >   Dr

 
 
 

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