thats really strange. You all got other ips...
Alvar showed me some rangebans which could cause this, but they did not...
I told about that problem already in the managment or admin chat, if you send me the ips via pm, I might be able to help. But its strange they can not either join the server nor the forum.
I think there is something wrong in the forum. I tested already some things which I think dont work propper...
I am sorry I could not help yet.