Administration - MongoDB: The Definitive Guide - page 115

Using the Admin Interface
By default, starting mongod also starts up a (very) basic HTTP server that listens on a
port 1,000 higher than the native driver port. This server provides an HTTP interface
that can be used to see basic information about the MongoDB server. All of the infor-
mation presented can also be seen through the shell, but the HTTP interface gives a
nice, easy-to-read overview.
To see the admin interface, start the database and go to http://localhost:28017 in a web
browser. (Use 1,000 higher than the port you specified, if you used the --port option
when starting MongoDB.) You'll see a page that looks like Figure 8-1 .
Figure 8-1. The admin interface
As you can see, this interface gives access to assertion, locking, indexing, and replication
information about the MongoDB server. It also gives some more general information,
like the log preamble and access to a list of available database commands.
To make full use of the admin interface (e.g., to access the command list), you'll need
to turn on REST support with --rest . You can also turn off the admin interface alto-
gether by starting mongod with the --nohttpinterface option.