Changing DNS record for www

I have an internal DNS running lets say example.com with an IP 192.168.0.1
When I put in ping www.example.com it goes to 192.168.0.1
I want to change it so that when I ping www.example.com it goes to a different external IP address, as the www server does not reside on my main server.
I tried in Server Admin, adding www in the zone, but it does not seem to change it.
Any ideas?

If you haven't already created a 'www' record in your example.com domain then you won't be able to resolve 'www.example.com'
The only exception to that is if you've added a wildcard record that says all unknown hostnames map to the same address, but you can't do that via Server Admin.
Even if you have added a wildcard, adding a specific 'www' record would override it.
Therefore I can think of two scenarios at play.
One is that you're not resolving the query via this server, and some other server is responding with the 192.168.0.1 address.
The other is that there's some problem with the zone data that's preventing it from loading. You should look at the logs to see if that's the case - they should indicate any problems.

Similar Messages

#554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop ##

Hi,
This is my first post here.
My exchange server of late is facing a peculiar problem. I get the error message that I have posted below when sending mails to any outside domain. However when I restart the server the mails can be resend to the address without any issue. After a certain
time again the issue pops up upon which I am forced to restart the server again. I am running 2007 Exchange on Windows 2003.
Generating server: name.mydomain.com
[email protected]
#554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop ##
[email protected]
#554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop ##
Original message headers:
Received: from name.mydomain.com ([1xx.xxx.xxx.xx5]) by MHDMAILS.mouwasat.com
([1xx.xxx.xxx.xx5]) with mapi; Wed, 19 Oct 2011 08:56:29 +0300
From: <[email protected]>
To: <[email protected]>
CC: "Al Alami,Tareq" <[email protected]>
Date: Wed, 19 Oct 2011 08:56:27 +0300
Subject: RE:
Thread-Topic:
Thread-Index: AcyAQ5tu8z9CvBfdT5+1pcGQkk6x0AIuwczAAAGZjeABQyW5sAADeeJQAAETNDA=
Message-ID: <[email protected]>
References: <[email protected]com>
<[email protected]com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
acceptlanguage: en-US
Content-Type: multipart/related;
            boundary="_004_EEC8FA6B3B286A4E90D709FECDF51AA06C0588CA11namedomain_";
            type="multipart/alternative"
MIME-Version: 1.0

On Sun, 23 Oct 2011 15:05:15 +0000, Jobin Jacob wrote:
>
>
>Even af
>
>ter removing my domain from the send connector I continue to receive the error. I would like to say I do have a firewall, Cyberoam. However, it was the same configuration till now in the firewall. I did try Mx lookup and found the following.
>
>Could there be any other solution to this issue ?
Sure, but it's necessary to ask a lot of questions since none of us
know how your organization is set up.
I see you also have "Use the External DNS Lookup settings on the
transport server" box checked. How have you configured the "External
DNS Lookups" on the HT server's property page? Is there any good
reason why you aren't just using your internal DNS servers? If the
internal DNS servers are configured to resolve (or forward) queries
for "external" domains then there's no reason to use that checkbox. In
most cases checking that box is a mistake.
http://technet.microsoft.com/en-us/library/aa997166(EXCHG.80).aspx
The behavior you describe (it works for a while and then fails;
restarting the server returns it to a working state) sure sounds like
some sort of DNS problem.
Rich Matheisen
MCSE+I, Exchange MVP
--- Rich Matheisen MCSE+I, Exchange MVP

When do I have to update my DNS records for my URLs, such as mail and autodiscover?

We currently have EX2010, with autodiscover.domain, owa.domain, and outlook.domain records in DNS. The outlook.domain is used for the CAS array and would not be modified during this.
We are going to install new EX2013 servers soon. When we do that, we plan to set all the URLs to be the same as EX2010 (like above).
From what I can tell, I do not have to change the DNS records until we actually start to migrate mailboxes. Would that be correct? I would rather do some additional testing, and get our load balancers configured correctly, before pointing autodiscover
and owa at EX2013.
Most of the documentation I have seen says change the DNS records at the end of your installation, but that would be if I was ready to migrate mailboxes I would think.
Thanks for any help or assistance on this. I have read all of the articles on the Exchange Blog site, but nothing really says make this change immediately.

Hi DarlonJeel,
Based on your description, I know you want to upgrade Exchange 2010 to Exchange 2013.
After you've completed the installation of Exchange 2013, you could update the MX record and the Autodiscover record to the Exchange 2013 CAS Server.
Don’t worry about that the users whose mailboxes are located in Exchange 2010 server. When a user uses OWA or OutlookAnywhere, Exchange 2013 CAS server will redirect to the Exchange 2010
CAS server automatically.
Hope it helps,
Best regards,
Eric

Dnscmd's OpenAcl option doesn't seem to change DNS record permissions

I'm creating DNS A records with dnscmd /recordadd, and I can't see a difference in the A record's permissions whether I use the OpenAcl option or not. Is this normal?
I was expecting with OpenAcl to see permissions similar to Write permissions for Authenticated Users or something. Instead I can't see any difference in the permissions at all and the permissions for non-admins are Read permissions for Everyone.
The DCs run win 2008 R2 SP1. The syntax I've been using for dnscmd.exe is:
dnscmd /recordadd mydomain.com mycomputer /aging /openacl A 192.168.0.123
I want to migrate from Infoblox DNS to AD-integrated. So I'm expecting to export to csv from Infoblox, reformat the csv file a bit and use dnscmd.exe to read the reformatted csv and create DNS records in AD. I'll also enable the option on the Windows computers
to register their DNS records.
I think that the records that dnscmd.exe creates in AD won't have permissions that allow the Windows computers to overwrite them unless I use the OpenAcl option. But OpenAcl doesn't seem to make any difference to the permissions. Very confusing! Thanks for
any help.

Thanks Kumar and sorry for replying so late. What you said is correct and what solved my problem was running Windows Update. I was testing using W2K8 R2 with SP1 but no updates after that. After I ran Windows Update, then creating a DNS record using dnsmd.exe
with the /OpenAcl argument did indeed set the permissions on the DNS record so that Authenticated Users could write to it.

Creating a DNS Record for a Host with Two or More IP???

Can we create DNS A Record for a Host with Two or More IP ... ( we like to use my website "mysite.com" pointing to two Ips )
Please help...

Sure, no worries.
In a production environment DNS will query always the first record it will stores in cache, you need to find a dynamic or NLB way to achieve the automatic fail over else when you will have an outage with the first IP, then you need to ask your clients to
clear the cache and register to DNS again, this i will not suggest in a production environment, lots of manual efforts and doesnt sound like a solution in a production environment, i would suggest you to explore windows NLB, it's easy to set and use the OS
license.
Thanks
Inderjit

How to create a DNS record for a domain itself (without a hostname)

Hi,
Normally, you can create a DNS record that points to the zone itself, e.g.:
@ 10800 IN A 196.197.200.201
How do you accomplish that on a Mac OSX Lion Server? The DNS requires you to enter a hostname and it does not accept "@" as the hostname as it normally appears in the zone file.
(manually modifying the host file does not work - I tried that ;-) )
Any help is appreciated
Thanks
Bjoern Dirchsen

Create either a blank record with a ., or a FQDN such as 'domain.com.' (note the trailing dot). Either of these should map to the domain name.

Change Condition Record for Billing Document

Hi All,
I want to change the condition value(0) for billing document, if condition record statisfy some checks.
Which user exit I have to use to change the condition records while saving the billing document.
Thnaks
Mugunthan

Hi,
You have to create a new VOFM pricing routine to change the value
Thanks,
Naren

In CATS Can We Change the Records For After Approval?

Hi To all,
Emp record his timings in CAT2 and the approval has given by related Mgr.After that he dont want that record .Can we make it empty that one.Is it possiable?

Hi Sekhar Uma,
Go to T-Code CAC1 and remove the check mark from No change after approval Tab.
This way your entered time will not become gray and you will be able to change.
I hope this helps.
Let me know.
Arti

Exchange sending email to Yahoo fails- #554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop ##

I have an Exchange 2010 server with SP3. It's otherwise running fine (as fine as Exchange is). We are in the midst of a migration to "hosted" Exchange (Office365).
I'm suddenly getting this error sending MAPI to Yahoo. MXTools says Yahoo's MX records are fine.
I ran th get-transport comandlet and get this message:
ClearCategories : True
ConuertDisclainerrIrapperToEnl : False
DßNConuersionMode : UseExchangeflSNs
ExternalDelayDsnEnabled : True
ExternalflsnDefaultLanguage :
ExternalDsnLanguageDetectionEnabled : True
ExternalDsnMaxMessageAttachSize : 10 MB (10.485.760 bytes)
ExternalDsnfleportingAuthority :
ExternalDsnSendHtnl : True
ExternalPostnasterAddress :
CenerateCopyOfDSNFor : <5.4.8. 5.4.6. 5.4.4. 5.2.4. 5.2.0. 5_1_4)
HygieneSuite : Standard
InternalflelayflsnEnabled : True
InternalDsnDefaultLanguage :
InternalDsnLanguageDetectionEnabled : True
InternalDsnMaxMessageAttachSize : 10 MU (10,405,760 bytes)
InternalDsnReportingAuthority :
InternalDsnSendHtnl : True
InternalSMTPSeruers : <)
JournalingfleportHdrTo : <>
LegacyJournalingMigrationEnabled : False
MaxDunpsterSizePerDatabase : 20 MU (20.971.520 bytes)
MaxDunpsterTine : 7.00:00:00
MaxfleceiveSize : 40 MU (41.943,040 bytes)
MaxflecipientEnuelopeLinit : 1000
MaxSendSize : 40 MU (41.943.040 bytes)
MigrationEnabled : False
OpenDonainfloutingEnabled : False
Pfc223lEncodingEnabled : False
ShadowHeartbeatfletryCount : 12
ShadowHeartbeatTineoutlnterual : 00:15:00
ShadowMessageAutoDiscardlnterual : 2.00:00:00
ShadowRedundancyEnabled : True
SuperuisionTags : <Reject. Allow)
TLSReceiueDonainSecureList : <)
TLSSendDonainSecureList : <)
UerifySecureSubnitEnabled : False
UoicenailJournalingEnabled : True
HeaderPronotionModeSetting : NoCreate
Xexch5øEnabled : True
I am the Exchange Admin by default, so I appreciate any advice anyone gives.
Thanks in advance.
[email protected]

Hi,
I recommend that you create a dedicated send connector for Yahoo and smarthost the mails to MX IP address of Yahoo. And then check if the issue persist.
Thanks.
Niko Cheng
TechNet Community Support

ICloud missing DNS records for SMTP servers

Cannot send e-mail from iCloud account using Mail.app (outgoing iCloud server is offline), incoming
iCloud server is p05-imap.mail.me.com and is reachable.
betelgeuse:~ mirek$ host p05-imap.mail.me.com
p05-imap.mail.me.com has address 17.172.100.69
The SMTP DNS does not exist (checked on external hosts with same results).
betelgeuse:~ mirek$ host p05-smtp.mail.me.com
Host p05-smtp.mail.me.com not found: 3(NXDOMAIN)
betelgeuse:~ mirek$
iPad and iPhone also complain about not being able to contact p05-smtp.mail.me.com
Apple please fix it!

I have the same problem. I spoke with AppleCare and they were supposed to be fixing it (and emailing me straight away) but so far they have not... May speak with them again if necessary...

DNS record ownership for DHCP clients

my configuration:
dhcp/dns/dc installed on same system - Windows 2008 R2 SP1 in domain environment.
all zones configured to secure updates only with aging and scavenging enabled
dhcp servers are member of DNSupdateproxy group.
dhcp are configured with standard domain user account (this user was made a member of dnsupdateproxy as well, DOES THAT MATTER?)
dhcp scopes are configured with default DNS setup (force DNS update by DHCP)
now...
all DNS records for endpoint devices on dhcp lease (windows7, mac os X, ubuntu) are owned by SYSTEM
in security tab for some DNS records i can see service account with write permission to record ( i believe this is desired state)
in other records service account has no permission but timestamps are still updated by computer account (hostname$ has write permission). these records have pencil icon on computers in dhcp lease table.
Problem with this (hostname$ has write permissions) is when user connect to network via VPN (obtains dhcp lease) it get's two records registered in DNS -> 1 record for ip distributed by dhcp server and 2nd record for his home private network.
Have anyone seen this before?
i've tried deleting DNS records / releasing ip on endpoint device (example win7). It would not register to DNS by DHCP. However if i do ipconfig /registerdns it will do it, but dhcp service account won't have permission no this record.

Apparently it appears that DHCP may not be configured with credentials, DHCP DNS settings are not configured to force DHCP to register ALL requests, nor has the DHCP server itself have been added to the DnsUpdateProxy group. These are all prerequisites
for DHCP to own all records, otherwise you will see default behavior, which is:
By default, a Windows 2000 and newer statically configured machines will
register their A record (hostname) and PTR (reverse entry) into DNS.
If set to DHCP, a Windows 2000 or newer machine will request DHCP to allow
the machine itself to register its own A record, but DHCP will register its PTR
(reverse entry) record.
The entity that registers the record in DNS, owns the record.
In summary:
Configure DHCP Credentials. The credentials only need to be a plain-Jane, non-administrator, user account. Give it a really strong password.
Set DHCP properties, DNS tab, to update everything, whether the clients can or cannot.
Add the DHCP server(s) to the Active Directory, Built-In DnsUpdateProxy security group.
Make sure ALL other non-DHCP servers are NOT in the DnsUpdateProxy group. For example, some believe that the DNS servers or other DCs not running DHCP should be in it. They must be removed or it won't work.
On Windows 2008 R2 or newer, DISABLE Name Protection.
If DHCP is co-located on a Windows 2008 R2 or Windows 2012 DC, you can and must secure the DnsUpdateProxy group by running the following:
dnscmd /config /OpenAclOnProxyUpdates 0
Configure Scavenging one one DNS server. Set the NOREFRESH and REFRESH values combined to be equal or greater than the DHCP Lease length. What it scavenges will replicate to others anyway.
DHCP Service Configuration, Dynamic DNS Updates, Scavenging, Static Entries, Timestamps, DnsUpdateProxy Group, DHCP Credentials, prevent duplicate DNS records, DHCP has a "pen" icon, and more...
Published by Ace Fekay, MCT, MVP DS on Aug 20, 2009 at 10:36 AM 3758 2
http://msmvps.com/blogs/acefekay/archive/2009/08/20/dhcp-dynamic-dns-updates-scavenging-static-entries-amp-timestamps-and-the-dnsproxyupdate-group.aspx
Good summary:
How Dynamic DNS behaves with multiple DHCP servers on the same Domain?
http://social.technet.microsoft.com/Forums/en-US/winserverNIS/thread/e9d13327-ee75-4622-a3c7-459554319a27
DNS Record Ownership and the DnsUpdateProxy Group
http://technet.microsoft.com/en-us/library/dd334715(v=ws.10).aspx
DNS Record Ownership and the DnsUpdateProxy Group
"... to protect against unsecured records or to permit members of the DnsUpdateProxy group to register records in zones that allow only secured dynamic updates, you must create a dedicated (NON-ADMIN) user account and
configure DHCP servers to perform DNS dynamic updates with the credentials of this account (user name, password, and domain). Multiple DHCP servers can use the credentials of one dedicated user account."
http://technet.microsoft.com/en-us/library/dd334715(WS.10).aspx
DNS record ownership and the DnsUpdateProxy group
http://social.technet.microsoft.com/Forums/en-US/winserverNIS/thread/b17c798c-c4b2-4624-926c-4d2676e68279/
Ace Fekay
MVP, MCT, MCITP/EA, MCTS Windows 2008/R2 & Exchange 2007, Exchange 2010 EA, MCSE & MCSA 2003/2000, MCSA Messaging 2003
Microsoft Certified Trainer
Microsoft MVP - Directory Services
Technical Blogs & Videos: http://www.delawarecountycomputerconsulting.com/
This post is provided AS-IS with no warranties or guarantees and confers no rights.

Shared Printers - Using a DNS record instead of server name for failover

I have a Server 2012 Print Server. I plan on creating a second one for failover purposes. I will be installing the shared printers on client PCs using Group policy preferences. Instead of using
\\servername\printer as the path, can I create a DNS record for the server name and use
\\dnsname\printer? That way, if the first server dies, I just edit the dns record to point to the second server instead of renaming the second server and changing the IP of the second server.

Hi,
Based on your description, we can try creating a DNS alias for our printer server and use the alias instead of the host name in the UNC path. When this server goes down, we
can make the alias pointing to another printer server.
Regarding how to create an alias for a DNS host name, the following article can be referred to for more information.
Add an Alias (CNAME) Resource Record to a Zone
http://technet.microsoft.com/en-us/library/cc772053.aspx
Hope it helps.
Best regards,
Frank Shen

What are the right DNS records to host more than one site on OSX Server (ML). My conf in Server.app looks right but one of my sites lands on the default server. Any suggestion?

I started using OSX Server on Mountain Lion a few days ago and it looks promising.
I do however measure my ignorance in DNS matters...
I defined two websites in addition to the the Default Server, so I have three names to deal with.
For argument's sake
- www.main.com is the default site
- www.sitea.com is the first site
- www.siteb.com is the second site
I define a virtual host for www.sitea.com and another for www.siteb.com
The resulting apache conf is what I would expect, I am pretty sure it is correct.
So I modified my DNS entries (they were A records) to point to my new OSX Server.
My result is:
- www.main.com shows the default site
- www.sitea.com shows the first site
- www.siteb.com shows...the default site
Any ideas?
Cheers

Thanks MrHoffman!
My problem ended up being a name but not in the DNS!...In Apache.
Your information allowed me to rule out possibilities and zoom in to the culprit faster.
I just report here the conclusion hoping it can help someone else.
When I installed OSX Server last week, I had in mind to principally run siteb.
During the initial install, this is what I must have entered and then forgot about it.
Then I defined my virtual hosts sitea and siteb and realised my machine was called siteb and changed its name to main to avaid a name collision. At which time I remember OSX Server telling me that changing the name could have consequences...But it apparently went ok, and it did except for one little thing.
The consequence was this:
in the main configuration file /Library/Server/Web/Config/apache2/http_server_app.conf the ServerName directive had remained siteb (instead of main). I manually updated it with TextEdit (could do vi from bash, its the same) and replaced siteb with main.
There is a way to detect it.
In Server.app, there is a "logs" panel, which displays all sorts of logs for everything including the websites.
Each website's logs are presented as "access" and "error" logs. The information was there, but I could not see it because the viewing window in remarkably small for so much information in raw text...
web logs are actually written to only two files in /var/log/apache2 (error.log and access.log)
I openned two bash windows and run tail -f on error.log in one and tail -f access.log in the other.
When I started the web service, apache threw a warning stating from mod_ssl saying that the certificate did not match the serve name...I the certificate was what I expected, I checked http_server_app.conf and found the ServerName directive that was not changed when I renamed my server...
Easily fixed when its found, but it can take a while to find.
BTW, I was using A DNS records for and it works, but I find your method of using CNAME records documents the administrator's intent better than with A records; I started to do the same. (A records a useful though, they can run a domain across multiple machines)
Cheers mate!

DNS settings for virtual host 10.6 server

We have just gone through a rebranding exercise, i.e. the company name has changed from 'mycompany' to our 'ourcompany'.
For various reasons we have decided to not rename our complete setup, but rather add a virtual host for our mail server including a second primary DNS zone for the new domain 'ourcompany'.
We are hosting our website externally, however since we added the second primary DNS zone incl. an A record (www) pointing to our external website hosts IP for 'ourcompany', workstations on our LAN can no longer access the website.
Running DIG for 'www.ourcompany.com.au' results in the correct A record IP address being shown, but it is still not showing in any browser – we also made sure we emptied our caches.
Although we thought this should work relatively easily, we are now totally confused as to the additional primary zones general settings... currently we allow zone transfer and provide an entry in the nameserver section.
Any ideas as to what might be going on here would be greatly appreciated.

Mr. Hoffman,
Than you very much for your reply - unfortunately, despite studying and testing your advice (incl. wesbite) we seem to not get much further.
Please find our comments inserted below...
MrHoffman wrote:
FWIW, both mycompany.com.au and ourcompany.com.au are real and registered domains; I'll presume they're not the domains you're migrating from or to. Accordingly, I'll use example.org for your old stuff, and example.com for your new stuff; the example domains are RFC-reserved for this usage.
Correct we are not using my bad example domains.
Each host should have one A record (and one AAAA record, if you have IPv6 active), and one of the more common errors in these migrations is setting up an A record for each new domain that might arrive; each host has one A (and possibly one AAAA) record, and that's the canonical name for that host. Externally, that'll probably be the latest name in any sequence (such as www.example.com), and all previous names (including www.example.org) will have CNAME entries.
To clarify do you mean the following: internally we should not have more than one A record for each host... i.e. one for example.org and one for example.com and presumably any other subdomains should be CNAME records?
2. externally we should change the A record for www.example.org to a CNAME record and create a new A record for www.example.com;
Internally (and here's why having a different domain inside is handy) use one of the old names; use example.org, for instance. This means you can use the public DNS services for the external web sites and resources; your internal DNS servers receive the requests for example.com hosts and go "duh, lemme ask somebody else for that", and that somebody else is the (public) DNS server your external DNS services for example.com hosts.
Exactly what we had initially done - basically we (naively) thought we could get away with only relying on external DNS translations... however that resulted in mail clients on our LAN loosing their connection every 5-10 minutes, thus we decided to setup another primary DNS zone which fixed that problem but created the other.
Please also note we have created a subdomain admin.example.com which properly resolves to the CMS backend - btw. from within this backend you can then preview the any page on the regular website with their non www. URLs.
Since the current setup resolves to the correct IP address I wonder if it could be a problem with the .htaccess rewrite rules the web developer has setup to remove the www. ... or is this too far fetched?
The usual trigger for not reaching the external A (or AAAA) records is either a stale cache on the particular client (for translations inside the Time To Live (TTL) values for the old DNS translations, or pending a local cache flush on each client), or (and this is more common) confusion over authoritative DNS servers; you have your internal DNS configured as authoritative for the new www.example.com domain, and also authoritative for the old www.example.org domain, and your external DNS is also authoritative for (probably) both domains. Internal requests get as far as the internal server, and get an authoritative translation (possibly being "no such host"), and don't go any further.
Safari & Firefox present with 'Server not found' errors.
So we are still stuck thus any further advice would be much appreciated.

DNS entry for DC not dynamically updating (Server 2008 R2)

Windows Server 2008 R2. I've got a single DC (I'm preparing to install the 2nd in the next few days). The host (A) record for the DC shows to be static for some reason. I changed the name of the DC recently, then brought down the Exchange server and rebooted
and it successfully connected again. I might have entered in a static DNS entry for the new server name before renaming the server, but I'm not sure.
I've tried to delete the static DNS record for the DC and then reload, but it continues to appear as a static entry. The mail server's DNS record still appears as a dynamic entry.
What am I doing wrong?
Noel Stanford Oveson
jeremyNLSO
MCTS, MCITP, CCENT, CNE, MCSE, CLSE
Berlin, Germany

Hello,
Like Mike suggested, it is normal that it is a static record.
However, if your DC with its new name is not updating its DNS record, check that "Register this connection' addresses in DNS" is checked on the DC's adapter and then run
ipconfig /registerdns using an elevated prompt.
This
posting is provided "AS IS" with no warranties or guarantees , and confers no rights.
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Changing DNS record for www

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