Hi, I am trying to join my computer to our domain but I unable to do so due to issues with discovering the name server. when i run nslookup it returns with a server unknown with an IP V6 address. I have a slight inclination as to the issue is but could not know how to troubleshoot it. On the DNS server someone as crated both multiple host records with different names pointing to the same IP address in both IPV4 and IPV6. However the IPV4 records in  SBS Server 2011 can have reverse lookup records where as IPV6 do not. I know IPV6 should have the capability to do a reverse lookup. Please help.

Hello,
Single exchange server.
5 e-mail domains
Two mx records
One spf record in one „primary“ domain public dns.
Spf v=spf1 mx –all

What about other 4 domains

I think that someone trying to spoof this 4 domains e-mail addresses and sends spam.
Do I need to add spf record to other 4 domains and how to configure spf for other 4 domains.

A long time ago I set up web / dns hosting for my domain and a bunch of clients.  somewhere I saw the idea of rather than ns1.networksolutionsy.com (just an example, don't think that's the correct URL) , that you could set up ns1.yourdomain.com  for the name servers  - i think it's just a cname in my DNS zone?  Actually looking now, it's an A record resolving to the IP of the web hosts' name server IPs.

But I remember there were some caveats / things to be aware of.  I'm looking to change things and the name server will change.

Anyone know what the caveats are?  Say I want to use godaddy's name servers for the different domains I control instead of networksolutions.  Can i just get the IP addresses of the godaddy name servers and change the A records for ns1 and ns2 in my domain zone and then at least the other domains.  but for my domain iteself?  There was something about trying to resolve ns1.mydomain.com but it has to look up my name servers first.... and that's a vicious cycle?

Anyone know what I'm thinking of / what the resolution was? because it is workingl and has been for years

The above location is a Microsoft Network Load Balancing Cluster and has a Cluster IP address of 10.5.22.44 and DNS of test.com (IP and hostname not the real ones)
The cluster contains 2 servers test1 (10.5.22.56) and test2 (10.5.22.15).

When you ping the DNS name we receive ping responses from other IP addresses (e.g. 10.5.22.77 and 78 etc).
What is the reason behind this?

I need some help in understanding what is the "DNS"? What is it exactly? Do I need to have it? If so which one do you recommend?

Thank you,

Basem Khawaja

Hello Experts - I have a question about making an MX record change.  We are using Barracuda's email filtering service and they are asking that our MX records be pointed to the following addresses:

Primary: d35456a.ess.barracudanetworks.com
Backup: d35456b.ess.barracudanetworks.com

Currently both MX1 and MX2 point to individual Barracuda IP addresses.  The records are hosted with Network Solutions.  When I sign in, I navigate to the Advanced DNS section to edit but the form requires a numerical IP address and won't allow me to enter the addresses above.  I feel like I'm missing something here, any ideas?

After exchange 2010 to 2013 upgrade none of my Outlook clients can connect to the new exchange server. AutoSync and OWA connections are OK.

When creating a new client profile I receive the message "The name can' be resolved". NSlookup is good. Inspection of DNS server shows A record good for new exchange server.

Very rusty with this. Working on an SBS 2010 standard.  Mail is not going out.  It's the weekend.  I see 58 emails in the send connector queue.

The connector was set up years ago to use a web / email hosting company as smarthost.   it's talking about authentication errors.  If the hosting company stopped that account  set up in the send connector, what other options do we have?

What companies are out there to let us use as a smart host? Why do we need a smart host? Why not be able to just push the emails out onto the web?  And how would we set that uo?

http://www.mustbegeek.com/configure-send-connector-in-exchange-2010/

talks of choosing use dns and MX to route mail.  Can we just use that? What's the pros / cons of doing that?  And /or how do you set up a 2nd smart host entry - if it can't send mail with first, smarthost, failover to 2nd?

to vote  




Hello,

I have a client who outlook 2013 emails just sit in the outbox

Recreated the profile
Unjoin from domain
Join the domain
Flushed DNS
Used static IP
Turnoff off cached mode
Update the network driver
Running wire shark now

Send Immediately” is enabled in Advanced settings.
 Windows Firewall - Turn off and try
Kicked it hard

I have enabling logging in Outlook 2013  the %temp%\outlook logging\OPMLog.log file logs no events of receiving items at all. There have been messages received, and yet no trace of them in the OPMLog.log file. This is the case for an Outlook 2013 client  using the same Exchange server 2013


OS is Windows 7 x64 (Office 2013)


It does not seem to matter if I tag or untag Online Mode or Cached Mode. As well as it does not matter if I tag or untag the "Oultook Anywhere" or RPC over HTTP.

 Synch operation completed
 2018.09.14 12:46:12 Sending done, Error code = 0x00000000
 2018.09.14 12:46:12 Sending done, Error code = 0x8004010f
 2018.09.14 12:46:12 MAPI Status: (IN -- ---/OUT -- ---)
 2018.09.14 12:46:12 Finishing the Spooling Cycle, Error code = 0x00000000
 2018.09.14 12:55:12 email address : Synch operation started (flags = 00000001)
 2018.09.14 12:55:12 email address : UploadItems: 1 messages to send
 2018.09.14 12:55:12 EXECUTING Put MAPI TASK
 2018.09.14 12:55:13 Starting the Spooling Cycle
 2018.09.14 12:55:13 MAPI Status: (IN -- ---/OUT fl ---)
 2018.09.14 12:55:13 MAPI XP Call: …

We have 2 domains within our forest, Domain 1 and Domain2.  Both domains are part of a secure private network. Some of the hosts in Domain2 are public facing and and have both public/private IP addresses. eg host1.domain2.com has private address 172.30.100.17 and public address 89.89.89.89. Domain1 has a conditional forwarder to an internal DNS server within domain2; dns.domain2.com.
If there is a network problem between the 2 domains or dns.domain2.com is rebooted, clients in Domain1 are resolving address 89.89.89.89 for host1.domain2.com. This address is not valid on the private network (I can exlain this further if need be), clients can't connect to it and they also cache it for serveral hours.

Is there a way to prevent DNS requests for domain2.com being routed to the internet if dns.domain2.com is unavailable?

Thanks
John

What are some reasons for not being able to ID my DNS server (specifically on my android phone)? My isp is At&t.  It's not that I don't have an address to lookup. It's more so that the windows nslookup command and the website https://www.whatsmydns.net/ yield no results.
Also, if someone could provide some mitigation steps or useful references  .

Much appreciated