I tried setting the kernel variables on /proc/sys/net/ipv4
by using

sysctl –w net.ipv4.icmp_echo_ignore_broadcasts=1

and get this ERROR
“error: unkown error 1 setting key ‘net.ipv4.icmp_echo_ignore_broadcasts”


I tried another method by using:

Sudo bash –c “echo 1 > icmp_echo_ignore_broadcasts”

and I get this error: “Operation not permitted”

So I modified /etc/sysctrl.conf by adding

net.ipv4.icmp_echo_ignore_broadcasts=1

and rebooted VPS from PLESK

and check the variable and it's still not changed???!
 

I look in /proc/sys/net/ipv4 and   icmp_echo_ignore_broadcasts has permissions 444

I tried “sudo chmod 644 icmp_echo_ignore_broadcasts” it showed no error but the permissions are still 444

Is it possible to change them on VPS? and how do you do it?
Thanks

Thanks. Man, I wish there is information out there on what you can and cannot do with VPS. I couldn't find it anywhere online or in the latest Linux books. Would have saved me lots of time from running in to the wall