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it's time for ISA -- 2006 or stirling? - 2.Aug.2008 4:53:22 PM

wlazara

Posts: 1
Joined: 2.Aug.2008
Status: offline

Well thanks in large part to outlook 2007/exchange traffic we have outgrown our netsceen 25 firewall pair and I have decided it's long past time I learned and implemented ISA. I plan to continue using the netsceens to screen outside traffic and take some load off the ISA box. The only thing we allow in is port 80 (light web traffic, IIS6), SSL (citrix secure gateway), SMTP (exchange 2007 outbound and inbound from an external spam filtering host), and SSL (exchange 2007 rpc/http and OWA).

I previously had the netscreens handling 4 separate networks (untrust, dmz, trust, vault). DMZ held my IIS web server, and citrix secure gateway. Trust held my citrix servers, and vault held the DCs, file, exchange, and sql server.

I would like to replicate this setup with ISA if possible. I have a poweredge 1950 I can use for the ISA box (one dual core 2ghz xeon, 4 GB ram, two integrated GBIT broadcom nics, two pciE intel gbit nics).

Many questions:

1) can this setup handle the traffic from 200-300 citrix users running outlook 2007?
2) can i set up a box for failover (rather than load balancing?)
3) should i bother implementing isa2006 or start putting my resources into learning stirling?

Thanks!
Wes