cpuminer --help to get the help :p -b is api-bind

0.0.0.0 allow to bind to the network (nice to monitor linux servers) -b 0 disable it, and -b 127.0.0.1:4048 means only allow api calls from localhost (default)

Stratum connection timed out just mean you were disconnected, pool server restart or network disconnect... but it should reconnect automatically to send the next shares