I am fairly new to DNS managing. I have been attempting for a while now to point both my root domain @ and www to my GitHub account page user.github.io.  I have a CNAME pointing www to user.github.io., but for some reason I can't do a CNAME that points @ to user.github.io..  The error I'm getting is CNAME records cannot share a name with other records.  I don't have the slightest clue what that's supposed to mean, please help.  If it makes a difference I'm using DigitalOcean's DNS controls
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This is a  about CNAMEs at the apices (or roots) of zones   It's relatively common knowledge that CNAME records at the apex of a domain are a taboo practice.  Example: example.com. IN CNAME ithurts.example.net.  In a best case scenario nameserver software might refuse to load the configuration, and in the worst case it might accept this configuration and invalidate the configuration for example.com.  Recently I had a webhosting company pass instructions to a business unit that we needed to CNAME the apex of our domain to a new record. Knowing that this would be a suicide config when fed to BIND, I advised them that we would not be able to comply and that this was bunk advice in general. The webhosting company took the stance that it is not outright forbidden by standard defining RFCs and that their software supports it. If we could not CNAME the apex, their advice was to have no apex record at all and they would not provide a redirecting webserver. ...What?  Most of us know that  insists that A CNAME record is not allowed to coexist with any other data., but let's be honest with ourselves here, that RFC is only Informational. The closest I know to verbiage that forbids the practice is from :     If a CNAME RR is present at a node, no other data should be   present; this ensures that the data for a canonical name and its aliases   cannot be different.   Unfortunately I've been in the industry long enough to know that "should not" is not the same as "must not", and that's enough rope for most software designers to hang themselves with. Knowing that anything short of a concise link to a slam dunk would be a waste of my time, I ended up letting the company get away with a scolding for recommending configurations that could break commonly used software without proper disclosure.  This brings us to the Q&amp;A. For once I'd like us to get really technical about the insanity of apex CNAMEs, and not skirt around the issue like we usually do when someone posts on the subject.  is off limits, as are any other Informational RFC applicable here that I didn't think of. Let's shut this baby down.
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My IP xxx.xxx.xxx.xx is pointing to example.com at GoDaddy but I just noticed that when I type the IP in browser, it doesn't redirect to the website, how can do this? I am sure this will happen through httpd.conf but unsure about what I need to add.
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This is a  about DNS (Domain Name Service).   If my understanding of the DNS system is correct, the .com registry holds a table that maps domains (www.example.com) to DNS servers.   What is the advantage? Why not map directly to an IP address? If the only record that needs to change when I am configuring a DNS server to point to a different IP address, is located at the DNS server, why isn't the process instant? If the only reason for the delay are DNS caches, is it possible to bypass them, so I can see what is happening in real time?
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Is it possible to set a CNAME record at the top of a domain? (i.e. @ CNAME www, @ CNAME foobar.com., etc.)  My ISP says that it's only possible to use CNAME's for subdomains but I've read somewhere else that is should be possible even if not recommended.
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My company has two websites a main one at www.example.com and one at subdomain.example.com which is a subdomain of the first and is our self hosted blog.   The way Google sees these with the www or no-www (called naked for now on) is that each of these actually are different when the www or naked version is used/not used in the front of the domain. I completely understand this. It is also advised that both should be set up in the Google Webmaster Tools, which I have done. Correct me if I am wrong on that in regard to having both set up.  Now the way it appears is that we can set a preferred domain up in Webmaster Tools only at the root domain level. The subdomain cannot have this and actually says the following:  **Restricted to root level domains only**.  So it appears that the domain should follow what the root domain says, which on our preferred one says to display the www.example.com and not the naked version. That is one issue I have in that one displays one way and the other displays another.   Is it that we have the wrong redirects in place for the subdomain? Another question is does this have any affect on SEO in regards to duplicate content on the web in how we have set this up?
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I'm getting mixed messages online regarding SSL support for a Force.com site that is branded with a custom URL domain:   These two articles,  and , seem to suggest that you can register a force.com domain, mycompany.secure.force.com as a CNAME record for a branded domain, www.mycompany.com. On the other hand this idea, , suggests HTTPS is not supported yet.   Assuming SF cannot support HTTPS yet, what can be done to brand the URL, if at all possible?
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I would like to see the Time-To-Live (TTL) value for a CNAME record.  I have access to  (on Apple Mac OS X), which gives me an answer like this:  % dig host.example.gov &lt;*SNIP*&gt; ;; ANSWER SECTION: host.example.gov.       43200   IN  CNAME   host1.example.gov. host1.example.gov.      43200   IN  A       192.168.16.10   Is the value '43200' the TTL for this DNS record?
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I'm trying to set up tracking on a project that I'm working on.   The main site is at http://www.example.com/  The order page is at https://www.example.com/index.php   Currently they have two different profiles under separate domains:     Main Site:   UA-aaaaaaaa-1   Order Site  UA-aaaaaaaa-2   This isn't giving me the results I want. When on the order page, I would like to see where on the main page users came from. Also, when on the main page I'd like to see when they navigate away to the order page, right now I can't tell the difference between an exit and order page click.  I'm not even getting the main site as a referrer to the order page.  What am I doing wrong? Should they be under one profile? Or two like I have them. Should I be setting the domain name (_setDomainName)? Should I be using _link() when linking to the order page. I can't find the right resource for what I need.
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I'm currently trying to set up a small static website with my domain from NameCheap using AWS S3, but I'm having trouble correctly pointing requests to the corresponding S3 bucket.  These are my configurations for the services I use:  NameCheap  CNAME         www  example.com.s3-website-ap-northeast-1.amazonaws.com. URL Redirect  @    http://www.example.com/   AWS S3  Static Hosting example.com.s3-website-ap-northeast-1.amazonaws.com.   I am fairly new to web hosting/domain stuff so please bear with me, but from what I understand from my registrar configuration is: users entering the naked domain example.com are redirected to www.example.com which then points to the AWS S3 bucket. Then the CNAME record then points to the corresponding AWS bucket.  Howeverwhen I try to visit www.example.com I somehow get pointed to the www.example.com bucket instead of the example.com bucket landing me to the AWS Bucket not found page.  Extra Details   I've checked with DNS Checker that www.example.com's CNAME record indeed points to example.com.s3-website-ap-northeast-1.amazonaws.com.. I've also tried making a www.example.com bucket then redirecting it to example.com but it seems it points to the actual domain instead of the bucket therefore causing a redirect loop. example.com-&gt;www.example.com-&gt;www.example.com (Bucket)-&gt;example.com-&gt;∞
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We are creating a web app that will have vanity subdomains such as user1.example.com. Since we'll have many subdomains, they need to be dynamic. We want to have a public "stage" area where we can test before going live. The requirement states that all dns names start with stage.  I'm using an AWS load balancer so I have to use a CNAME. Research on google and here tell me that wildcards are supported in DNS CNAME entries (except perhaps when using godaddy) but I haven't yet convinced myself that you can have a wildcard in the middle of an entry.  Is stage.*.example.com valid for a wildcard DNS CNAME and would it work as I'd expect?  Thanks!
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I   that using multiple PTR records in a DNS configuration is not recommended.   However, the reasons are often vague, or not so obvious, naming:    "it can cause problems",  "can trigger bugs in programs expecting a single answer" : it's the software's problem then, isn't it?! "can make DNS answer packet too large" : isn't this fixed with ?   Are these good reasons? Do you know of any other (good) reasons? All this kinda looks like a "legacy fear"...
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Even though my postfix server cannot be used without authentification (open relay), sending mail in another users name after logging in is still possible like this:  EHLO domain.org auth plain eW91IGxpdHRsZSBkaXJ0eSBiYXN0YXJkIDstKQ== 235 2.7.0 Authentication successful mail from: otheruser@domain.org 250 2.1.0 Ok rcpt to: recipient@otherdomain.org 250 2.1.5 Ok data 354 End data with &lt;CR&gt;&lt;LF&gt;.&lt;CR&gt;&lt;LF&gt; Please send me your account info. . 250 2.0.0 Ok: queued as D40692A61AA quit   How can this be prevented?
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I am running multiple web servers in my house, each of which is plugged into my router.  Server A Server B Server C  I currently can only use one server since my IP (xx.xxx.xx.xx) port 80 is pointing towards server A. However some domains point to server A, some to B, etc.  With my one IP address, how do I point to each server? For example my A(host) records all point to just my IP address.  Sorry if I sound confusing. Let me know if I am not being clear.  Each server is running Ubuntu Server 12.04.02 and is using Apache (if that helps). My router is also a Netgear and my ISP is Time Warner Cable.
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I have multiple domains hosted on a shared hosting plan which provides a single IP address for all domains hosted. I want domains such as:   www.plumbersinnewyork.com www.plumbersinwashington.com www.electriciansinnewyork.com   (Domains are for example only)  All these websites are on shared hosting and, on pinging each domain, show the same IP Address.  Will this affect my SEO strategy in any way?
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Has anyone got a nice solution for handling files in /var/www? We're running Name Based Virtual Hosts and the Apache 2 user is www-data.  We've got two regular users &amp; root. So when messing with files in /var/www, rather than having to...  chown -R www-data:www-data   ...all the time, what's a good way of handling this?  Supplementary question: How hardcore do you then go on permissions?  This one has always been a problem in collaborative development environments.
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I recently received the following message from Google Webmaster Tools:     Dear site owner or webmaster of ,      [...]      Below are one or more example URLs on your site which may be part of a   phishing attack:            [...]   What I don't understand is that I never had a subdomain repair.gotgenes.com, but visiting it in the web browser gives an actual  My DNS is , which does not list a repair subdomain. My domain name is registered with GoDaddy, and the nameservers are correctly set to NS1.AFRAID.ORG, NS2.AFRAID.ORG, NS3.AFRAID.ORG, and NS4.AFRAID.ORG.  I have the following questions:   Where is repair.gotgenes.com actually registered? How was it registered? What action can I take to have it removed from DNSs? How can I prevent this from happening in the future?   This is pretty disconcerting; I feel like my domain has been hijacked. Any help would be much appreciated.
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I need this for load balancing. For example, I've two azure storage accounts (say a and b) and the blob addresses for those are a.blob.core.windows.net and b.blob.core.windows.net. Both of them store identical data. Now I need to provide a single external name (say example.com) which points to both the storage accounts and should work in round robin. This can be achieved if I create two CNAME entries in DNS as following and it resolves to one of them in round robing.   example.com CNAME a.blob.core.windows.net  example.com CNAME b.blob.core.windows.net   But I can not create two CNAME records for a single name in Windows DNS server.  So is it ever possible?