-u/--user <user:password>
might work but it might not as well, so if it doesn't work try the -d
option & put there elements of form in original login page (save
original page on your box & get a closer look at the code) ... but
then again if the page is proptected by some sort of cookie you're
gona be obliged to learn the curl man page by heart.

-- 
"He who asks a question may be a fool for a few minutes. He who does
not ask may be a fool forever"