NumLock
03-22-2002, 01:12 PM
i don't know were to put this question, but here goes,
ok i know ip addresses are given to one computer to communicate and receive data from another computer address. and i know that right now i hav my own ip address (dats y im able to veiw web pages) but my question is what multiple ip address got to do with reselling and dedicated servers? i see that in a dedicated server, it says:
"7 ip addresses
1gb ram
1ghz"
wat do we used the ip addresses for?
thanx
9onlinehost
03-22-2002, 01:22 PM
dns servers
accounts and other sites you have
jeep.com has ip of 11.22.333.44
ford.com has ip of 11.22.333.45
both are on the same server of 11.22.333.11
dns servers are
ns1 11.22.333.22
ns2 11.22.333.33
All are on the same machine hope this makes sense or is a bit of an example
NumLock
03-22-2002, 04:08 PM
a ok, so if ford.com and sony.com were hosted in the same server, then their ip addresses would be:
11.22.333.11 : sony.com
11.22.333.12 : ford.com
their both on the same server so the first 3 sets of numbers are the same (which means from the same server) and the last set of numbers is the unique address of each domain sony=11 and ford=12. correct me if im wrong
so why do people have to pay for (extra)ip addresses?
9onlinehost
03-22-2002, 04:11 PM
yup you are correct your netblock will always be the same
you may have a difference like
11.22.333.**
and 11.22.319**
depending on how many ips you have and what blocks you have
lets say you get 10 ips
and you have 10 sites all using each ip and you get another site who wants there own ip for anonym ftp, ssl or such
now you need to get another ip for that site.
is why you have to buy more
you can run more than one site off of an ip tho
11.22.333.45 <-- ford.com
11.22.333.45/~jeep/ <- jeep.com
In addition to Deb's input, IP Address is also required if you want to install secure certificate. Another advantage is that when your DNS down, your site is still accessible through your ip address (e.g. http://11.22.33.44).
Many times, we don't need to assign ip address because name-based is enough. Also, it is good to preserve the use of IP address since we have a limited number of ip addresses (ipv4) available today. :)
ToastyX
03-23-2002, 05:03 AM
If you're only hosting one site and using external DNS servers, then you don't really need more than one IP address. If you want to use your own DNS servers, you need two unique IP addresses, even if they point to the same server. If you're going to be hosting multiple sites, the other IP addresses can be used for sites that require SSL or anonymous FTP.
allan
03-23-2002, 09:35 AM
Originally posted by NumLock
a ok, so if ford.com and sony.com were hosted in the same server, then their ip addresses would be:
11.22.333.11 : sony.com
11.22.333.12 : ford.com
their both on the same server so the first 3 sets of numbers are the same (which means from the same server) and the last set of numbers is the unique address of each domain sony=11 and ford=12. correct me if im wrong
so why do people have to pay for (extra)ip addresses?
Just to clarify something, the first three octects (sets of numbers) being the same does not necessarily mean that the sites are on the same server. In fact it is pretty much irrelevent. IP addresses are assigned in netblocks. A netblock is a group of IP Addresses that share a common subnet mask. Depending on how a provider provisions IP addresses, you may have two servers in a data center like this:
Server 1: 11.22.333.11
Server 2: 11.22.333.12
Or both addresses may be bound to the same server.
IPv4 (the current IP Addressing scheme) Addresses are in short supply so most hosting companies use virtual hosting, which where they use the same IP Address for multiple sites.
So, on the same server you would have:
www.ford.com: 11.22.333.12
www.jeep.com: 11.22.333.12
www.chevy.com: 11.22.333.12
www.vw.com: 11.22.333.12
www.saab.com: 11.22.333.12
and so on....
There are times when you need a unique IP address, which is why prociders usually offer several IP addresses with a server.
The reason why they charge, is that ARIN (or the local registry for their contry) charges them for IP addresses. The second reason, is that because IP Addresses are in short supply they want to make sure people are not using them frivolously.
