get the portal url

hi

I would like to get the SRM portal url to access the shopping carts, catelogs etc...searched in scn and in web but couldn't get it right....here are the steps I followed:

1. port from SMGW

2. host from SMICM

3. IMG > SRM server >....

in all the above case I replaced the below url with the respective host and port number but still unable to get the right one:

http://host:port/irj/portal

since there is a delay in getting response from basis team I started to dig into it...any help appreciated .

thk u