I am having a very trival problem I have a message board portlet deployed.
When I access the portlet from localmachine I am able to do all kind of stuff.
But when I try to access the portlet from outside ie http://www.xyz.com/web/guest/message-board
and try to perform add message or other operation I get http://www.xyz.com/web/guest/null

what I am doing wrong here ?????

I have in control panel setup virtual host as www.xyz.com

but everything works fine from my local dev machine.

Any idea what I am doing wrong.

My set up is ISP ->Apache on port 80
-> via Aj Proxy 8009 -> tomcat on dev machine.

Below is the link
http://www.kanoka.info/web/guest/message-board

I think you have to add your public IP to this property

#
# Set this property to "ip" or "domain" for the redirect security method. If
# set to "domain", the portal will only redirect users to domains listed in
# the property "redirect.url.domain.allowed". If set to "ip", the portal
# will only redirect to domains whose IP address resolve to an IP address
# listed in the property "redirect.url.ip.allowed".
#
redirect.url.security.mode=ip

#
# Input a list of comma delimited IPs which the portal is allowed to
# redirect to. Input a blank list to allow any IP. SERVER_IP will be
# replaced with the IP of the host server.
#
redirect.url.ips.allowed=127.0.0.1,SERVER_IP

It worked..Sir ji you are awesome...liferay rocks..