Johns Hopkins Example
SPUEditVar idpId=http://shibboleth.ebscohost.com
SPUEdit -IncludeIP @^https*://.*\.ebscohost\.com/.*$@https://shibboleth.johnshopkins.edu/shibboleth-idp/SSO?target=https%3a%2f%2fshibboleth.ebscohost.com%2fShibAgent.aspx%3fshib_returl%3d$e0&shire=https%3a%2f%2fshibboleth.ebscohost.com%2fShibboleth.sso%2fSAML%2fPOST&providerId=${idpId}@irs