The remote host responded with a TCP timestamp. The TCP timestamp response can be used to approximate the remote host's uptime, potentially aiding in further attacks. Additionally, some operating systems can be fingerprinted based on the behavior of their TCP timestamps.

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Отключение…

Ставим время в UTC

root@host:~# ln -fs /usr/share/zoneinfo/Etc/UTC /etc/localtime
root@host:~# echo UTC0 > /etc/localtime

Отключаем Tcp timestamps

root@host:~# echo “net.ipv4.tcp_timestamps = 0” > /etc/sysctl.d/tcp_timestamps.conf