Question : DNS errors after running dcdiag.exe

I'm getting one warning and some errors when I run dcdiag.exe. The IP address in all the errors are to do with the dns server at our ISP (Verizon). The internet seems to be working OK inside our network, but I started noticing that when I log out of my gmail account the web browser sometimes gives me a dns error and says it can't find the page. I'll then back to gmail without logging in (gmail doesn't ask me to) and log out again. It does let me log out when I go back into gmail a second time. I have the DC (CCHSfp1) set as the main DNS server and a forwarder set to go to 68.238.0.12 (Verizon's closest DNS server for our region - Illinois ). I also have Verizon's secondary DNS server IP address (68.238.112.12) as a forwarder under the 68.238.0.12 address. The 68.238.0.12 address is also set up as an alternate DNS server on the under Local Area Connection/properties on the adapter itself. I'm adding the output from the dcdiag.exe utility below.

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Domain Controller Diagnosis
 
Performing initial setup:
   Done gathering initial info.
 
Doing initial required tests
   
   Testing server: Default-First-Site-Name\CCHSFP1
      Starting test: Connectivity
         ......................... CCHSFP1 passed test Connectivity
 
Doing primary tests
   
   Testing server: Default-First-Site-Name\CCHSFP1
   
   Running partition tests on : ForestDnsZones
   
   Running partition tests on : DomainDnsZones
   
   Running partition tests on : Schema
   
   Running partition tests on : Configuration
   
   Running partition tests on : blmcchs
   
   Running enterprise tests on : blmcchs.org
      Starting test: DNS
         Test results for domain controllers:
            
            DC: cchsfp1.blmcchs.org
            Domain: blmcchs.org
 
                  
               TEST: Basic (Basc)
                  Warning: adapter [00000001] HP NC7781 Gigabit Server Adapter has invalid DNS server: 68.238.0.12 ()
                  
               TEST: Forwarders/Root hints (Forw)
                  Error: Forwarders list has invalid forwarder: 68.238.0.12 ()
                  
               TEST: Records registration (RReg)
                  Network Adapter [00000001] HP NC7781 Gigabit Server Adapter:
                     Error: Missing A record at DNS server 68.238.0.12 :
                     cchsfp1.blmcchs.org
                     
                     Error: Missing CNAME record at DNS server 68.238.0.12 :
                     674ccfbf-5234-4d52-9399-130e4e97653e._msdcs.blmcchs.org
                     
                     Error: Missing DC SRV record at DNS server 68.238.0.12 :
                     _ldap._tcp.dc._msdcs.blmcchs.org
                     
                     Error: Missing GC SRV record at DNS server 68.238.0.12 :
                     _ldap._tcp.gc._msdcs.blmcchs.org
                     
                     Error: Missing PDC SRV record at DNS server 68.238.0.12 :
                     _ldap._tcp.pdc._msdcs.blmcchs.org
                     
               Error: Record registrations cannot be found for all the network adapters
         
         Summary of test results for DNS servers used by the above domain controllers:
 
            DNS server: 68.238.0.12 ()
               2 test failures on this DNS server
               Name resolution is not functional. _ldap._tcp.blmcchs.org. failed on the DNS server 68.238.0.12
               
         Summary of DNS test results:
         
                                            Auth Basc Forw Del  Dyn  RReg Ext  
               ________________________________________________________________
            Domain: blmcchs.org
               cchsfp1                      PASS WARN PASS PASS PASS FAIL n/a  
         
         ......................... blmcchs.org failed test DNS

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Answer : DNS errors after running dcdiag.exe

> The 68.238.0.12 address is also set up as an alternate DNS server on the under Local Area Connection/properties on the adapter itself.

It shouldn't be.

The only servers that should be listed in adapter configuration are those that are capable of answering for the Active Directory domain. That one cannot, hence the error messages you're seeing.

Is the other problem you're seeing limited to Gmail?

Chris