Buenas
en la opcion Authentication del CAPTIVE PORTAL en la opcion de Shibboleth Authentication, config, Shibboleth Module Configuration, en la opcion WAYF / IdP Whitelist agrege las sitios que desea pasar sin ir al CAPTIVE PORTAL, cuidado con los sitios que agrega porque puede dejar pasar sitios no deseados
in the CAPTIVE PORTAL Authentication option in the Shibboleth Authentication, config, Shibboleth Module Configuration option, in the WAYF / IdP Whitelist option add the sites you want to pass without going to the CAPTIVE PORTAL, be careful with the sites you add because you can let sites pass not wanted