Assumming noone change the defaults, you can access it via http://localhost:8080
You can change the port in jboss-5.1.0.GA\server\default\deploy\jbossweb.sar\server.xml (same instructions as for Tomcat)
You can change the hostname by using the -b run option, see also the first netry here: https://community.jboss.org/wiki/JBoss42FAQ
Thank you! I found in the server.xml file that the http connector was commented out. I enabled it and was then able to access the localhost address with port 8080.