mcavic - 11:59 pm on Feb 28, 2008 (gmt 0)

I tried the command on my machine, and it worked fine. The existing connections will stay open for a while unless you restart Apache (but iptables should block the inbound traffic).

I don't know why it would continue to allow new connections, though. Are you sure that iptables is running? Adding the rule doesn't automatically start it.