insert in the header IS_SSL=true

Need irule (when redirect from https to http for all request) this the action (insert in the header IS_SSL=true) Kindly advice

Need irule (when redirect from https to http for all request) this the action (insert in the header IS_SSL=true)

I guess you mean forward instead of redirect.

when HTTP_REQUEST {
    HTTP::header remove "IS_SSL"
    HTTP::header insert "IS_SSL" "true"
}