Virtual Servers Frequently Asked Questions

Virtual Servers FAQ's

Below are some frequently asked questions that we have compiled from our partners about our Virtual Server offering. We hope that these questions will assist you with any issues surrounding Virtual Servers. If you still have questions after reading through the FAQ's, please feel free to open up a support request within our Support Portal.

I want to transfer my hosting to you. What are your name servers?

Just point your domain to those servers and you will be able to advertise and manage the zone right out of our Virtual Hosting control panel.

Our name servers are as follows:


Which Development platform do you support?

  • ExchangeDefender runs two virtual hosting platforms: Windows-based, running Microsoft Windows 2003 and Linux-based, running Redhat Enterprise Linux 4.
  • Windows-based platform supports Frontpage Extensions (including other WebDav publishers like Visual Studio, Visual Interdev, ASP.NET Matrix, Expressions) and full support for ASP scripting and ASP.NET & ASP.NET 2.0 (currently we only offer ASP.NET 3.0 on Windows 2008 Preview Servers).
  • Linux-based platform supports all FTP publishing programs which includes pretty much everything commercially available. We support perl, PHP and python programming environments as well as several popular toolkits. Web server runs on Apache 2.0.
  • ExchangeDefender recommends Linux-based hosting unless your web server admin is specifically developing software in ASP or ASP.NET settings.

I uploaded my webpage via FTP, why do I not see it?

  • FTP uploads are only permitted for web hosting on Linux-based hosting plans. If you have a Windows-based hosting plan and you uploaded your web pages via FTP, you just uploaded them to the file sharing area, not to the web server. Please upload web pages for Windows-based hosting using a WebDav client like Frontpage, Expression, Visual Studio, Visual Interdev, Microsoft Office, etc.
  • If you are on a Linux hosting plan and you uploaded your pages using FTP, make sure you place those files in the www/directory. The area above the www directory is intended for private file storage, www/and below are meant for web pages.

My ISP is blocking of filtering port 25 traffic. What can I do?

  • If your Internet Service Provider starts blocking or filtering traffic on port 25 (outgoing email), you will know almost immediately because your outbound mail will stop going out at best or start producing errors at worst.
  • Internet Service Providers enforce port 25 restrictions from time to time in order to help police their networks and make sure they are not being used as a source of SPAM. Unfortunately for you, port 25 restriction means you will not be able to send mail through your domain.
  • One way to get around this is to not use port 25.
  • ExchangeDefender allows mail relay on port 2525 and 25252. So if you can't get to port 25, odds are the higher ports will be unmonitored/unfiltered and you can use them to gain access to our servers. (The other option is to use SMTP-over-SSL on port 587).
  • The easiest way to find out if your ISP is not interfering with 2525 or 25252 is to telnet to our server on those ports. For example, drop to the command prompt and type:
    • telnet 25252
    • Trying
    • Connected to (
    • Escape character is '^]'.
    • 220 ESMTP ExchangeDefender; Wed, 14 Nov 2007 15:20:37 -0500
  • If you see the 220 prompt you should not have any issues using us as your outbound relay.

I would like to use my iPhone with the service. What do I set as my SMTP Server?

  • For mobile devices, you should always use the local SMTP server provided by the mobile operator, mobile carrier or local ISP. While setting up mobile devices to use our servers is trivial, it is important to remember that each provider may have their own network policies that restrict access to remote servers, both through port restrictions and proxy policies.
  • The same recommendation goes for iPhone as well. Contact your mobile operator and request the address of their local SMTP server for the messages you send from your iPhone.
  • For AT&T Wireless/Cingular (non-exsistent) in the United States, the address of the SMTP server is:

How can I redirect my domain to another domain or subdomain?

  • When you sign up for virtual hosting, request Linux as your web hosting platform. After your site is created, upload the file named index.php to/www directory with the following contents in it:
    • Header ("Location:"); ?>
  • Replace the web address above with the address you wish to redirect the URL to.

I want to control my own DNS. Can I still use you?

  • Absolutely. While ExchangeDefender control panels give you access to manage your DNS zone, we understand if you wish to use your own third party subscription service. Unfortunately, we cannot provision hosting without provisioning the DNS zone. Local DNS resolution is a requirement. You can still use your external name servers- just make sure you synchronize the zones. In other words, make sure your zone has the correct IP addresses and that the zone hosted on our name servers has your other records.
  • For example, say you wanted to use us for web hosting only and had your DNS hosting elsewhere and email in another place altogether. If your web site generates email and sends it to a user at this domain, it will automatically go to our local mail server. To avoid this issue, make sure you create all the necessary A, MX and CNAME records that match the records on your name servers.

I changed my MX records away from ExchangeDefender mail servers and now other users that are Hosted at ExchangeDefender cannot send me mail.

  • When you create a new hosting account with us, ExchangeDefender name servers are configured as authoritative for your domain zone and point the MX record to our mail servers.
  • While you can change the MX record (or any other record for that matter) at any time through the control panels at, our system will always treat virtual hosting mail as local. Even if you host your mail elsewhere, users hosted on ExchangeDefender's mail servers will always loop back to our own infrastructure.
  • If you do decide to host your mail elsewhere, please open a support request to remove mail hosting from our network.