Hide PC from PINGs Geetu R. Vaswani Linux, Network, Security August 16, 2009 1 Minute # echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all To unhide, change the 1 to 0. Share this:TwitterFacebookLike this:Like Loading... Related Published by Geetu R. Vaswani View all posts by Geetu R. Vaswani Published August 16, 2009