Use the TCP timestamp response to approximate the remote host's uptime and aid in further attacks. Additionally, some operating systems can be fingerprinted based on the behavior of their TCP time stamps.
Procedure
- ♦ Disable the TCP timestamp response on Linux.
- To set the value of
net.ipv4.tcp_timestamps
to0
, run thesysctl -w net.ipv4.tcp_timestamps=0
command. - Add the
net.ipv4.tcp_timestamps=0
value in the defaultsysctl.conf
file.
- To set the value of