Web Hosting strategy – NAT’ing and ARR

5 pts.
Tags:
IIS
IIS Server
Netgear switches
Network Address Translation
SQL 2005 Database
SQL Server 2005
I'm looking to develop a new strategy for our web hosting farm.

Currently I've got  set of standalone IIS 6 web servers and sql 2005 database servers sitting in a network behind a kerio winroute proxy (which handles our nat'ing and intrusion prevention and VPN to our office location) which in turn sit behind a managed (by our ISP) checkpoint firewall.

There are a few other boxes doing other things NAS storage, DNS, AD (secondaries from our AD within our office network at another location),mail, background processing services.

Everything talks through a couple of Netgear 1gb switches.

Throughput to circa 200 sites is average 1000KB/ps spiking to up to 4000KB / ps during intense periods.

I'm looking at Microsoft's latest IIS 7.5 modules and note their ARR server solution which allows distribution algorithmically to different hosts. I like this approach combined with our further ventures into virtualisation (so far I've just run a few mail application servers, and utility function hosts).

My question is how I would best implement ARR, if it is really suitable to our needs.

I'm guessing I would need to ditch the kerio NAT'ing as ARR would handle that (?). But I would still need to manage a VPN to our office location.  

Does anyone have a view on this? I appreciate Kerio winroute is a cheap and dirty NAT'ing and VPN solution, but its worked solidly for us for 3+ years. However I do now need to improve our redundancy and performance, if we are to scale up.

 



Software/Hardware used:
HP, Microsoft, Kerio

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