Hi. I recently made a big balls up by announcing to the world that my (apartment block's) router, an 827H, was completely unsecured. I have since removed the default users and passwords and changed the admin/enable password.

Question is what else do I have to do to secure this thing?

Also, I am concerned that it may have already been compromised. Who knows how long it has been unsecure, and my announcement of the fact probably didnt help. Is there any way to check if anything malicious has been done to it?

Total noob at this, so details would help.

Thanks.