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Shared IP?
Hosting multiple domains on shared IP?
(c) Radhika Venkata 2003.
This has been a long time debate whether to host multiple
domains/websites on single ip. Some people and veterans say
'one must have unique ip for each domain' and some people say
'no need to have it because search engines take the URLs in to
account not ips'.
Most of the hosting companies with reasonable hosting prizes
don't offer static ips for the customers unless the customer
really needs it like setting up SSL on their websites. If you
insists of getting a static ip for your domain it will cost
you few more dollars per month.
Before going in to that topic, we will see what is the meaning
of 'ip'.
***What is static ip and shared ip?***
Static ip:
Static ip is unique to your website. For example
123.2.234.234 is your website ip address, you can access your
website by typing-
http://123.2.234.234/ in the browser.
That means this unique number represents your website in
the WWW.
Shared ip:
Shared ip is shared by two or more websites/domains. You
can access the websites that share the same ip by-
http://www.123.2.234.234/~user1/
http://www.123.2.234.234/~user2/
http://www.123.2.234.234/~user3/ etc,
***Questions regarding shared ip:***
1. Problem with banning:
Years back the search engines used
to take in to account the ip address of the websites. Search
engine Technology has changed and virtual domains becoming
popular, the URLs becoming the priority than ip addresses of
the websites.
So if one website that sharing the same ip was banned means
all the websites that were sharing the same ip was banned by
search engines. Even now somewhere I read that some search
engines like Google crawl by caching the ip to save bandwidth.
Virtual hosting is a fairly common setup with many web sites,
more common than many people think.
It is said that sharing ip is not that bad if all domains are
behaving good with out spamming search engines.
-----------------------------------------------
When I write to Inkotomi support desk, about this sharing ips
check the answer that they gave to me:
My question:
Are search engines index only one site from one IP
address (one DOMAIN (not URL) per one IP address)
even though I submit both of them regularly?
Inkotomi support service:
When submitting sites, search engines only take into account
the URL that is being submitted. Not the IP it came from. If
the pages are different then there will not be a problem.
Virtual domains are very common on the internet, so if what is
mentioned was true in all cases, search engines basically would
not be effective in finding anything.
The problem mentioned is most likely not all that common,
especially when priority submission are used due to the
frequent refresh of details.
My question:
If 10 sites are hosted on one IP. If one site was
banned because of spamming or someother thing. This banning
is based on IP or domain name? If it is based on ip then all
other sites are affected in search engine positioning?
Inkotomi support service:
Most engines will only ban the name(URL) and not the IP,
although some may ban the IP as well. It is pretty much
up to the individual engines how they do this.
If you suspect an IP has been banned you should contact
the engine in question and sort it out with them.
Published with the permission of Karl Anderson,
Trellian Support.
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2. Are shared ips are slow to access when compared to
static ips?:
This is completely disbelief that sharing ip slows down the
websites. There are thousands of websites on one ip and if all
those sites slow down, that hosting company must have lot of
angry customers.
3. What is HTTP/1.1?:
Hypertext Transfer Protocol (HTTP) defines how Web pages are
requested and transmitted across the Internet.
HTTP/1.1 improves the virtual hosting business by including
the hostname as a header rather than by IP address. This means
that the server can support multiple virtual hosts without
wasting IP addresses. If you are running a browser that support
this feature of HTTP/1.1 (Netscape Version 3 and Microsoft
Internet Explorer 3 and all higher versions) your site can be
viewed by header and not IP address.
HTTP/1.1 accounts for over 95% of the browsers running today.
There are more important security reasons for upgrading older
versions of Netscape Navigator or Internet Explorer rather
than using old versions.
Older browsers that are not capable of resolving several
virtual hosts to a single IP number will instead displays a
default index document that would show all virtual accounts
that were assigned to that IP address, allowing the visitor
to click on a link and go to their desired web site.
4. Do I really need dedicated ip?:
If you are hosted by a Linux (Unix) system with a web server
capable of virtual hosting using headers, there is no reason
at all for needing a dedicated IP. The IP address of the
machine is enough to allow you access to your site using FTP
or Telnet, and browsing your site with HTTP/1.1
compliant browsers is not a problem. There are no measurable
speed or access restrictions experienced when hosting with
headers rather than IP’s.
5. Are there any drawbacks with Shared ip hosting?:
There are not really that many noticeable differences for the
surfers. However, there are few limitations to 'shared
IP hosting'.
1. You cannot use Anonymous FTP 2. Older browsers such
as lynx, Netscape IE less than version 3 cannot view your
site on a shared IP. 3. You need dedicated IP for SSL on
your site.
But How many people still using these older versions of
browsers is the next question. People always try to upgrade
to newer versions of browser softwares.
***Follow these priciples in choosing shared or dedicated
ip hosting:***
==If you want Anonymous ftp for your web site and
==SSL feature or
==If you don't want to take risk of getting banned because
of other sites activity by sharing same ip.
(Nobody knows whether search engine bans the sites based on
ip or domain name.)
Go for multidomain account that hosts only your websites. So
nobody share that particular ip except your websites. So no
question of banning because of other websites.
While you selecting hosting company for your multidomain
account, check what version of HTTP they are using. If they
are using HTTP/1.1, then you can go for that webhosting. Most
of the webhosts use this.
If you still don't want to take chances about sharing ip,
then go for a multidomain account that provides unique ips
for your websites for little additional fee.
http://www.hosting-essentials.com/
You can host all of your websites on your single
dedicated IP.
DISCLAIMER: All these are from my experiences and opinions.
So follow these based on your own judgement - Radhika
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Radhika Venkata
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