Upgraded to 3.0 - now no access from the outside?

[mfoc]

I just upgraded to 3.0 from 2003 and I can't get to any pages from outside of my network. Everything inside works fine, but only if you use the machine name

http://sharepoint

)or if the external domain name resolves to sharepoint). Since the upgrade, nobody outside of the network can get in. There have been no changes made to the Checkpoint firewall it sits behind.

I suspect this is due to some sort of security issue in IIS, as I am prompted for credentials, but then it goes to a "page cannot be displayed" error...??

 

[mfoc]

Maybe this is better described in simpler terms:

My external address to the sharepoint server no longer connects to sharepoint.

Internally,

http://machinename/sites/sitename

works fine.

Externally,

http://domainname/sites/sitename

doesn't work fine.

I get the authentication window - then a page cannot be displayed.

 

[mfoc]

Found the answer here:

http://www.toddklindt.com/blog/Lists/Posts/Post.aspx?ID=39