I like to manually dial on and dial-off dataone.i made shortcuts on Gnome-panel for ON and OFF as below:
I like to configure things in my Linux box,not in router.a simple preference.and yes,there is some chance of password theft if someone by any chance telnet into ur router and get access to ur dataone username and password.
better u change the default password for "admin" to something else!.
I periodically change dataone passwd,after i saw a demo how the engineer in bsnl logged with my id
that's enough for my confidence!also there are arseoles who collects bb username and passwd from router's pppoe-inbuilt dialer.so I think better I have it configured in My Debian via pppoe tools.and iptables Firewall gives adequate protection