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General DNS FAQ
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General DNS FAQ
What is DNS?
DNS is the technology that ties text-based
domain names to the numeric IP Addresses that are necessary to locate
the domain's server on the net. Please refer to the following documents
for more information:
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How can I host multiple Web
sites on one IP Address?
You can set up as many domain names as you
want pointing to the same IP Address using DNS, just keep adding zones,
and setting the IP addresses. However, you need a Web server that uses
the 'host' header to route the different domains to different Web instances.
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Can I use VeriSign's name servers
for our LOCAL DNS Queries?
No, VeriSign's name servers are non-recursive,
or non-caching, and should not be used to resolve your LOCAL DNS queries.
Your Internet Service Provider's name servers should be used for this
purpose.
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Does VeriSign monitor SPAM
abuse on its network?
Yes, we do monitor and do not tolerate SPAM
abuse on our network.
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My ISP blocked port 80, how
can I run a Web server?
Here's how you can run a Web server:
- Sign
up and get started with VeriSign DNS Hosting.
- Make
your Web server listen on port number like "6000" or "5000"
- Check
to see if your Web server works by in a browser using a URL: http://3.4.5.6:6000/.
Use the port number that you're listening on and the real IP address
of your machine.
- Add the
"IP Address" for your Web server in VeriSign's Domain Manager:
"ww2.domainname.com" points to "ip address".
- Add a
Web Forward entry for your domain called "www.domainname.com"
that points to http://ww2.domainname:6000/.
Turn cloaking off and let people know they
are going to http://ww2.domainname.com:6000, which allows the browser
to perform better.
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How can I check to see if DNS
is working?
A frequent mistake is to use "ping"
to test DNS. On Windows NT/2K and Unix, there are tools called "nslookup"
and "dig." Before you contact VeriSign's DNS Customer Support
team, you can check to see whether or not your registrar is pointing
your domain to the correct name servers. Since the Whois information
may not be up to date, go to a command prompt/console and enter the
command:
nslookup
-type=NS yourdomainname.com
If the response does not contain all of the
correct name servers, then you should contact your registrar to update
the name server information.
To check to see whether a particular server
is responding, you can add the server name:
nslookup
www.yourdomainname.com nameservername.com
If the response has a number of 'root-servers'
that means the server does not know about the domain name and is referring
you elsewhere.
To look for a certain record type, like the
"MX" record or the "SOA" record, you can use the
parameter "-type=MX" or "-type=SOA".
nslookup
-type=MX yourdomainname.com
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