How DO I exclude an IP Address

One more spin...

I prefer Colin's approach above for a single address exclusion, but if you ever decide to add further addresses, here would be the logic for comparing the address to a group list. Just create a Data Group List of type Address in the iRules section in GTM for this to work. In the example, I have named the group list "address_exceptions".

when HTTP_REQUEST {
  if { not [matchclass [IP::client_addr] equals $::address_exceptions] } {
    log local0. "Redirection to HTTPS!"
    HTTP::redirect "HTTPS://testcase.college.edu/test/"
  }
}