May Users are presuppose to have different IP's for different Domains (i think for SEO). we own many IP ranges and want to provide this as Service and feature

I need this also... i have multiple non-SSL website's under one subscription and one website which needed SSL now under another account because else i got in to trouble with IP's :(

SNI doesn't work for us until Windows XP is gone - there's too many users still using XP or older browsers on other OS's who access websites we host.

For us it's definitely about different domains on different IP's for SSL.

Just to add more optional security
http://en.wikipedia.org/wiki/Domain_Name_System_Security_Extensions

Very glad to see that this is now planned

When i have email mkt system runing under domain i can set it up multiple ips to this to make a ip load balance.
This is very usefull.

For us it is also to use of multiple SSL's as well

I have written a quick guide for a quick 'n dirty hack:

http://forum.parallels.com/showthread.php?297343-How-To-Host-1-site-on-multiple-IP-s

It can also be done via custom vhost templates, but I feel the best way for this to be incorporated is for Plesk to have it as default.

I'm looking for something somewhat else, I need multiple IP's on 1 site. The plesk box is multi-homed (several VPN's coming in) and this website needs to be accessible over all the VPN's.

This is only possible if apache listens to all the IP addresses (1 for VPN1, 1 for VPN2 + external IP = 3 total).

We would need it for SSL in our CMS. As we are using one domain per language, so every language has its own certificate and IP. SNI would not work for us, we have a lot of people still using old browsers/OS

We need this for SSL for sure; SNI is still very problematic due to so many people using old OS/browsers. This is quite a frequent problem for us.

SNI isn't supported by older OS such as MS WINXP, browsers IE6->8.
User should be able to choose IP from the list assigned to one subscription:
- for single domain
- for group of domains (multidomain ssl)
- for subdomain
- for group of subdomains in one of domain (wildcard ssl)
and maybe for domain alias.

For our purposes, we simply want a client can use multiple IPs with one subscription.
The customer should be able to choose the IP address of each domain name (as proposed in the creation of a subscription).

For us : 1 subscription = multiple domain names

Sometimes, a client wants to assign an exclusive IP address to a website
Sometimes, a client wants to distribute its websites on multiple IPs to improve its SEO
etc.

Thanks for reviewing this. The main use-case that I have is different domains on different IPs for SSL (yes I know about SNI, but there is still concern about full support by client browsers).

On CMS systems that support multi-site, such as Drupal or Magento Commerce, a single document root can be used to serve multiple domains (or sub-domains). As a result, using domain aliases is an effective way to set up such sites. When SSL is required then it would be useful to have different IPs for each alias.

We would like to learn from you how you will use it. i.e. different domains on different IPs for SSL (but did you know about SNI?), or for subdomains? for aliases? Why an alias would need another IP?

Need this to add an alias domain on its own IP

Currently, Domain aliases and subdomain have the same IP than the primary domain. It will be a nice thing for websites which use an extension for each country with a geolocated IP attached to each domain.

Need this feature !

Yes, this would be good for subscriptions with multiple SSL sites. (I have managed work around with vhost.conf, but it is not ideal.
Thanks!