Forum Discussion

Hamza's avatar
Hamza
Icon for Cirrus rankCirrus
Jan 19, 2023

Impact of disabling TCP Timestamp in TCP and fasl4 profile

Hello, We have conduction a recent PCI scan which identified TCP timestamp as a risk. I would like to know the impact of disabling tcp timestamp in tcp and fastl4 profiles for clinet and sever side...
security
  • Paulius's avatar
    Paulius
    Jan 19, 2023

    Hamza from my understanding this would make it so if you were looking at a tcpdump you wouldn't be able to accurately record the round trip time for communication back and forth as well as anything that uses the timestamp to adjust the receive window or transmit buffer.

Hamza's avatar
Hamza
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Hello Gajji Mike757 Paulius,

Thank you.

I have a another question please, can i disable tcp timestamp in communication between Admin user and interface of management?

 

Gajji's avatar
Gajji
Icon for Cirrostratus rankCirrostratus
Apr 11, 2023

Yes, it is possible to disable TCP timestamp .It help improve security by making it more difficult for attackers to perform certain types of attacks, such as TCP sequence prediction.

Also important to note :

 that disabling TCP timestamp may cause some performance issues, particularly for applications that rely on precise timing. Therefore, it is important to thoroughly test the impact of disabling TCP timestamp before making this change in a production environment.