Okay, the good news is I was correct, your ip address is being temp banned by the server. This is a server ban so not related to the forum only. Hence why you'll get no error message. Here's the log:
Jun 10 21:07:25 host lfd[25824]: (CT) IP x.x.x.x (US/United States/cpe-hawaii.res.rr.com) found to have 51 connections - *Blocked in csf* for 1800 secs [CT_LIMIT]
Jun 10 21:37:26 host lfd[27767]: Incoming IP x.x.x.x temporary block removed
Jun 10 21:37:26 host lfd[27767]: Outgoing IP x.x.x.x temporary block removed
Jun 11 14:47:43 host lfd[25961]: (CT) IP x.x.x.x (US/United States/cpe-hawaii.res.rr.com) found to have 55 connections - *Blocked in csf* for 1800 secs [CT_LIMIT]
Jun 11 15:17:44 host lfd[28149]: Incoming IP x.x.x.x temporary block removed
Jun 11 15:17:44 host lfd[28149]: Outgoing IP x.x.x.x temporary block removed
After 30 minutes of the ban, it removes your ip address. According to that, you're being banned because you're making too many connections. Any idea why? You appear to be running Firefox so can't be that - any other software that could be doing this?
I've added your ip address to the whitelist so this shouldn't ever happen again but yeah, I do need to find out why this is happening. If it's happening to you, could be happening to others.