On Thu 05 Jul 2012 at 23:02:19 +0800, lina wrote: > Chain INPUT (policy DROP) > target prot opt source destination > > Chain FORWARD (policy DROP) > target prot opt source destination > > Chain OUTPUT (policy ACCEPT) > target prot opt source destination > > Seems It dropped all. I even can't connect to the internet. You've been playing with ufw, haven't you? Purge it to get a sane policy.