Possibly Hacking Attacks

[محروم.كوم]

Ove the past few days, when I log on, I see 5 to 10 guests all at the admin control panel, and it has the stop sign next to them, so obviously they arent getting in, or are using a program to decipher the password, but the really strange thing is, its MY IP ADDRESS, at least the first 7 digits

so for instance if mines 68.28.137.100

than the others are

68.28.137.###

I tried banning just the exact IP's and then it would not let me login as it said my ip was banned, although I put all of the numbers in, is this a hacker attempt?

Any information would be appreciated

Steve __DEFINE_LIKE_SHARE__