The ipkg web package installs a web page "http://<your slug>/Management/package.cgi" on your slug. This web page shows:
ipkg-web is shell script which runs as cgi script. It is slow but a little faster if it can use bash. So i recommend to install bash (ipkg install bash).
There is a second page "http://<your slug>/Management/sluginfo.cgi" which gives a lot useful information for trouble shooting.
The positive feedback showed me that such a page is useful.