Can I change the value of those parameters (
sysctl.conf file in
From this link, I see that, these values can be edited.
ip_forward=no ipv6_forward=no spoofprotect=yes syncookies=no
The above variables can now be set in
/etc/sysctl.conf which is acceseble via the System configuration menu, System variables.
From this answer, I see changing
net.ipv4.icmp_echo_ignore_broadcasts is not going to change anything.
For timestamp, I believe you refer to the system variable
net.ipv4.tcp_timestamps. As per this link, it is suggested to leave it turned on unless if you live on an extremely slow connection such as a 56 kbps modem connection to the internet.