I am requesting this feature because our PCI Vulnerability test complains about this being in the enabled state:
TCP timestamp requests enabled
Severity: Potential Problem
A remote attacker could possibly determine the amount of time since the computer was last booted.
TCP timestamps are generally only useful for testing, and support for them should be disabled if not needed.
To disable TCP timestamps on Linux, add the following line to the /etc/sysctl.conf file:
net.ipv4.tcp_timestamps = 0
To disable TCP timestamps on Windows, set the following registry value:
Data: 0 or 1
To disable TCP timestamps on Cisco, use the following command:
no ip tcp timestamp
Where can I read more about this?
More information on TCP timestamps and round-trip time measurement is available in RFC1323 and Microsoft
timestamp=5457877; uptime guess=0d 15h 18m 50s