The very 1st time that you try to create/comment on a post, you must become a registered member. Until that happens, you can read only. After that, you need to be logged in to become "interactive". Log-ins time out, the duration is specified at log-in. Once logged in, then you can undo your seatbelt and are free to roam about. Occasionally, an account is flagged for abusive/inappropriate behavior. That normally prevents you from logging in. But, for a normal acct, there are no restrictions, no repeated submissions. Might there be a security restriction at your end? I believe some restrictions might inhibit proper forum operation. I do not have sufficient clearance to look into such high level behavior.