Please only bid if you have expereince in ISA 2007 and can do do the following tasks:
configure isa server so all users from two subnets can go to internet only thur this isa server
make rules so that smtp/exchange server behind this isa server cannot be used for spamming, but can be accessed from specified ip
9 freelancers are bidding on average $187 for this job
There is no isa server 2007 but isa server 2006. i have done this type of work a lot. I am currently managing isa server 2004 and 2006 for so many companies. I can help you to setup this efficiently.
I am very familiar with ISA server. I have used it since it ISA 2000 and used Proxy server before that. It shouldnt take more than a couple of hours to get you to your goal