On Mon 06 Jun 2016 at 18:11:27 (+0200), Norbert Kiszka wrote: > Dnia 2016-06-06, pon o godzinie 11:00 -0500, David Wright pisze: > > On Mon 06 Jun 2016 at 15:27:16 (+0000), Mark Fletcher wrote: > > > On Mon, 6 Jun 2016 at 23:15, Santiago Vila <sanv...@unex.es> wrote: > > > > > > > On Mon, Jun 06, 2016 at 10:06:54AM +1200, Jan Bakuwel wrote: > > > > > Check your firewall rules. > > > > > > > > It can't be firewall rules. Try this to block outgoing ping: > > > > > > > > iptables -A OUTPUT -p icmp --icmp-type echo-request -j REJECT > > > > > > > > then try to ping anywhere. You will get a different error message, > > > > namely "Destination Port Unreachable". > > > > > > > > [ Why people do not read all messages in the thread before answering > > > > is a mystery to me ]. > > > > > No, that's not true, you definitely can get this very error due to > > > something to do with the firewall, maybe it's not able to resolve the ping > > > target rather than not able to reach the resulting host, I'm damned if I > > > can remember the specifics but I've definitely seen this happen on an lfs > > > box before and it was nothing to do with perms (as I said before, to your > > > point about people not reading the whole thread...) > > > > I don't understand this argument. > > > > Why would ping bother to open a socket to a host it couldn't resolve? > > > > I know precious little about firewall rules, but AIUI the rules > > determine whether to respond with things like Drop, Reject, Deny. > > Now the OP didn't manage to open a socket; that's in the error message: > > "ping: icmp open socket: Operation not permitted" > > So how would ping find out how the firewall was going to react to its > > ping message without opening a socket to send something? > > Did You change linux kernel, kernel modules or something lastly?
I now know even less about what you're talking about. I don't have a problem. I have easily duplicated the OP's error message in the following way: $ cp -ip /bin/ping /tmp $ /tmp/ping alum.local ping: icmp open socket: Operation not permitted $ /sbin/getcap /tmp/ping $ /sbin/getcap /bin/ping /bin/ping = cap_net_raw+ep $ That's jessie. On wheezy: $ ls -l /bin/ping /tmp/ping -rwsr-xr-x 1 root root 31104 Apr 12 2011 /bin/ping -rwxr-xr-x 1 david david 31104 Apr 12 2011 /tmp/ping Cheers, David.
