Hi
For the first part of your question - check this:
http://www-10.lotus.com/ldd/stforum.nsf/DateAllFlatWeb/1F9809F9B149592C852576380045751D?OpenDocument&ca=drs-fo
For web interface login. Do you have SSO enabled on the server? If yes you won't be able to log in to web admin by IP address. Must log in as FQDN. (if that is the problem - comes back to login page after entering ogin details)
Greets