dns

Subdomain mapping to another external subdomain

I'm trying to map help.domain1.com to help.domain2.com. I've seen this on UserVoice. They let you map something.yourdomain.com to something.uservoice.com. On domain1.com I've set up a CNAME to help.domain2.com. It works fine but when I open help.domain1.com I get the content of domain2.com instead of help.domain2.com. After some exper...

Moved hosts, how do I view the site?

Hi, I recently moved hosts with my blog and I have waited 72 hours for it t propergate properly. I just checked the site there and it's showing it on the old host. When i use a proxy, I can see the site perfectly on the new host. The problem seems to becoming from my PC. EDIT: Tried to flush the dns and it's the same story, it's quite ...

Example.com alternative

Let's say you want to provide an example url in documentation somewhere. The correct thing to do is use example.com, since that is the defined location for such things and anything else you come up with is likely to be actually registered somewhere and serving up who knows what to your readers. My questions is, what do you do if you ne...

Setting up Reverse DNS Records

This question is not directly programming related but I need my Server to pass Spam filters for my app to work properly. I talked to my ISP about rDNS and the guy from tech-support told me if I write an email with what they should add to my DNS record they would do that. My question: What should I tell him to add if my hostname is "http...

Multiple Domains to One Virtual Host | Wildcard Host (shared hosting)?

I have the following task: Create one website which is accessible with 20 different domains names. Same files, same folder, same ip. Question (shared hosting): Can this be accomplish with a bare cname's pointing to the same common subdomain or do we need one static ip for all? The problem is sure shared hosting and I'm trying to avoid...

Why do some websites require "www"?

Why do some websites require the "www" before the rest of the address, while others seem to resolve just as well with the "www" as without it? Is there some compelling reason why you would set up your domain name to work like this? ...

Configuring Windows DNS resolver cache

Note that I'm talking about the client DNS resolver cache. This message is not concerned with the Windows DNS Server. I have a C# program that does a lot of DNS resolutions. Because the HTTPWebRequest component won't let me change the Host header, I can't create my own internal DNS cache. So I have to depend on the Windows DNS cache,...

Does anyone know of any good (and cheap) domain registration companies who all access to SPF/TXT records

I use 1and1 mainly - through legacy/lethargy reasons as I would not recommend them. Unfortunately, they do not allow access to the SPF/TXT records of domains, and I need this. At the moment I do not need a new host (as there are too many client systems to move over), but just someone to register the domain and give me access to the DN...

DNS: Do the NS names set for a zone have to match the NS names reported by the upstream TLD servers?

I've noticed that several service providers are operating DNS services for their clients' domains with NS names set for the zone and returned by the authoritative name server (in authority section / NS & SOA records) that don't match the NS names returned by the upstream server (e.g. TLD servers) and which were used for the lookup. Exam...

Can I use the /etc/hosts file to configure an alias

The /etc/hosts file can be used to override dns definitions, i.e. to point an hostname to a different ip. I want to use /etc/hosts to make an alias record, i.e.e to make my computer think that www.mysite.com does not point to a "hard coded" up but instead is synonym of mychangingip.myip.com. Can it be done? ...

SQL 2005 instance won't work with DNS

Basically I have a sql 2005 standard server with a named instance installed (server/instance1). I also have created a DNS entry (dnsDBServer) that points to the ip address of the sql server. A web application we have can connect using the following methods (ipaddress/instance1, server/instance1) but cannot connect using the dnsDBServer...

[i.][m.] HTTP Addresses

I noticed that on the web some sites have subdomains dedicated to images or information on sub-domains such as i.domain.com. I was wondering what is the advantage of this? Is there a name for this type of "Method"? Where can I get more information on this? Thanks. ...

How to Build a custom simple DNS server in C/C++

I need to build a custom simple non-authoritative caching DNS server in C/C++. Any guidance? Links? Samples? Thanks! ...

Adding an host programmatically (name resolution under Windows)

I would like to programmatically add to Windows a name / IP association so that this name can be resolved locally. This does not have to be persisted between reboots. The only way I now is to add an entry to the "hosts" file, but this feels hacky especially since I would like to automate this. Is there any way to do this using a comman...

Is Root domain CNAME to other domain allowed by DNS RFC?

We are hosting the page of many of our customers. We want to be able to provide our customers with a subdomain of our own domain like customerpages.ourdomain.com so they can create a CNAME to this subdomain. www.customer1.com CNAME customerpages.ourdomain.com. {This will work just fine.} But the situation is I don't know if all our ...

How to overcome root domain CNAME restrictions?

We are hosting many web applications for our customers. As is obvious they want to use their own domains to refer to those applications, usually they want that any user that either type http://www.customer1.com or http://customer1.com goes to their web application. The situation we are facing is that we need to have the flexibility to ...

VMWare Server 2.0.0 and vista 64bit DNS dosnt resolve

I have the following VM with CentOS 5 running on vista 64. I have my DNS set in my resolv.conf (servers resolve on my windows machine and I have tried various servers). I can ping the DNS but it wont resolve any names for me. I have put some names in my vhost and those domain work fine. Is anyone else having this issue? Is DNS busted...

Possible to setup some kind of custom home DNS to reroute URLs?

Basically what I run now on my home PC is one of these WAMP in a box applications so I can write my PHP code and use a MySQL database. That is all fine, but I run a lot of websites so now I have a folder I've called /~WEBSITES/ where I put everything making the URLs to these http://localhost/~WEBSITES/domain.com/ -- what I'd like is to ...

Keeping DNS at one place. What possibilities are out there?

I host a couple of websites for some customers. So basically what they do is change their A Record to my server's IP and everything works fine. Now I want to upgrade my server and of course my clients have to change their A Record. So what I want for the future is to keep my flexibility in choice of servers without having to annoy my ...

Under what conditions with NSLOOKUP and PING return different IP addresses on windows XP?

Inside our firewall at work, my machine frequently resolves to the wrong IP for some of our domains. We have a DNS server that is our primary DNS to resolve external domains to internal IP addresses (192.X.X.X instead of the public IP). Sometimes I will get resolved to the public IP, which won't route correctly through our firewall. W...