Looking for logging into the Redirect To Portlet 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 Redirect To Portlet site. After that you can login as usual with your login credentials.
https://community.liferay.com/de/forums/-/message_boards/message/43435785
https://dev.liferay.com/develop/tutorials/-/knowledge_base/7-0/writing-a-custom-login-portlet
https://stackoverflow.com/questions/10597031/how-to-regain-login-portlet-in-liferay
https://stackoverflow.com/questions/44276733/handling-authentication-failure-in-auto-login-in-liferay
https://github.com/liferay/com-liferay-login/blob/master/login-web/src/main/resources/META-INF/resources/login.jsp
https://github.com/liferay/com-liferay-login/blob/master/login-web/src/main/java/com/liferay/login/web/internal/portlet/action/LoginMVCActionCommand.java
https://www.ibm.com/support/knowledgecenter/en/SSYJ99_8.5.0/security/config_ssl_login.html
https://www.ibm.com/developerworks/community/forums/html/topic?id=9c6f7ace-bc55-4e68-8dce-f40b941b27b0
http://www-10.lotus.com/ldd/portalwiki.nsf/dx/Redirection_to_a_page_using_Websphere_Login_Service
https://www.konakart.com/forum/index.php?topic=1983.0
https://www.novell.com/documentation/idm/agpro/data/b2hlp3f.html
http://portal.uned.es/portalHelp/ohw?topic=ptlogin1_htm
http://tech.forums.softwareag.com/techjforum/posts/list/14197.page