To redirect any webpage after logout in CAS, follow the instructions below:

1. Change Liferay CAS configuration. Go to
Control Panel > Settings > Authentication > CAS

2. Update "Logout URL" property:

[sourcecode language="text" gutter="true" wraplines="false"]
https://directorysrv1:8443/cas-server-webapp-3.3.5/logout?service=${my-logout-page}

Where:
${my-logout-page}: http://lfry01:8080/web/guest/lfry01-logout-page
[/sourcecode]

3. Change CAS configuration. Set the "followServiceRedirects" property to "true"
on the "logoutController" bean defined in the cas-servlet.xml.

[sourcecode language="text" gutter="true" wraplines="false"]
[root@directorysrv1 ~]# vim /usr/share/tomcat5/webapps/cas-server-webapp-3.3.5/WEB-INF/cas-servlet.xml
[/sourcecode]

[sourcecode language="xml" wraplines="false" highlight="7" padlinenumbers="2"]
[...]
<bean id="logoutController" class="org.jasig.cas.web.LogoutController"
p:centralAuthenticationService-ref="centralAuthenticationService"
p:logoutView="casLogoutView"
p:warnCookieGenerator-ref="warnCookieGenerator"
p:ticketGrantingTicketCookieGenerator-ref="ticketGrantingTicketCookieGenerator"
p:followServiceRedirects="true"/>
[...]
[/sourcecode]

4. Re-start Tomcat (CAS-server):

[sourcecode language="text" gutter="true" wraplines="false"]
[root@directorysrv1 ~]# service tomcat5 restart
Stopping tomcat5: [ OK ]
Starting tomcat5: [ OK ]
[root@directorysrv1 ~]#
[/sourcecode]

5. Test redirect.

[caption id="" align="alignnone" width="414" caption="Page redirected by CAS"]Page redirected by CAS[/caption]