On Wed, 29 Aug 2018 21:54:15 -0400 Jamon Camisso via talk <[email protected]> wrote:
> On 29/08/18 21:44, Howard Gibson via talk wrote: > > I am playing with my hack Ubuntu machine, and I am sorting out > > security. I want to disable ping. This is a laptop, and I want to > > document the application of aluminium foil. > > > > The standard ping disabler is the following line... > > > > # echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all > > > > This works fine on my Fedora laptop. On Ubuntu, I get... > > The # makes me think you are root on the Fedora laptop. Yes, I have a Fedora laptop, and that is how I disable ping. > > $ sudo echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all > > -bash: /proc/sys/net/ipv4/icmp_echo_ignore_all: Permission denied > > That's expected with a sudo echo > redirect invocation. The shell is > doing redirection. sudo is invoking echo, the output of which is being > redirected in your normal user's shell to a file that you do not have > permission to write to. > > Try this if you want to go the sudo route: > > echo 1 |sudo tee /proc/sys/net/ipv4/icmp_echo_ignore_all It works! Thank you. Now all I have to do is stick it in a boot script. -- Howard Gibson [email protected] [email protected] http://home.eol.ca/~hgibson --- Talk Mailing List [email protected] https://gtalug.org/mailman/listinfo/talk
