Looking for logging into the Form Redirect To External Server site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Form Redirect To External Server site. After that you can login as usual with your login credentials.
https://stackoverflow.com/questions/17722591/external-cpanel-login-and-redirect
https://forum.mikrotik.com/viewtopic.php?t=9665
https://joomla.stackexchange.com/questions/16119/redirect-users-to-the-page-pointed-in-the-url-after-login
https://drupal.stackexchange.com/questions/40072/drupal-login-not-redirecting-to-sso-external-server-login-page
https://moodle.org/mod/forum/discuss.php?d=156049
https://documentation.cyclos.org/4.3/cyclos-reference/ch04.html
https://forum.netgate.com/topic/41796/captive-portal-on-external-server
https://love2dev.com/blog/ways-to-use-javascript-redirect-to-another-page/
https://github.com/reduxjs/redux/issues/297
https://confluence.atlassian.com/confkb/login-does-not-redirect-to-destination-url-after-login-217744264.html
http://jasonwatmore.com/post/2016/12/08/angular-2-redirect-to-previous-url-after-login-with-auth-guard
http://oxpedia.org/wiki/index.php?title=AppSuite:ExternalLoginPage
https://docs.filerun.com/external_login_form