We have set up a web server for our school. We are able to access the web
pages externally. We cannot access the web server internally using the
http://www.domainname.org. We can see it using http://192.168.10.xxx, but
we are not able to see the links since they are linked using the domain
name. Is there something I need to do with the DNS server in order to
make this work properly?

Thank you,