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Nathaneil_Balag's avatar
Nathaneil_Balag
Icon for Nimbostratus rankNimbostratus
Oct 29, 2015

Close wait and Fin wait time value.

Hi everyone,

 

Just want to ask if there is a prod. impact if I change default value of CLOSE and FIN into a higher value.

 

Thanks.

 

7 Replies

  • Do you mind if I ask why? Also please note there's no such thing as FIN_WAIT...do you mean TIME_WAIT?

     

    • Brad_Parker's avatar
      Brad_Parker
      Icon for Cirrus rankCirrus
      FIN_WAIT and TIME_WAIT are two different things, though they are similar. FIN_WAIT happens when an endpoint initiates closing the connection with a FIN. TIME_WAIT is the time to wait after the connection has been closed.
  • If you increase Close Wait you are increasing the amount of time the connection stays in LAST_ACK. i.e. the time you wait for an ACK after you have sent a FIN. Why would you want to wait longer?

     

    If you increase FIN WAIT you are increasing the amount of time the connection stays in the FIN_WAIT state before before closing. The time the server waits after receiving the ACK from the FIN that was sent. Why would you want to wait longer?

     

    • Nathaneil_Balag's avatar
      Nathaneil_Balag
      Icon for Nimbostratus rankNimbostratus
      Hi Parker, do you have any scenario when I can use this option? I just wander why F5 put this option TImewait and Finwait.
  • If you increase Close Wait you are increasing the amount of time the connection stays in LAST_ACK. i.e. the time you wait for an ACK after you have sent a FIN. Why would you want to wait longer?

     

    If you increase FIN WAIT you are increasing the amount of time the connection stays in the FIN_WAIT state before before closing. The time the server waits after receiving the ACK from the FIN that was sent. Why would you want to wait longer?

     

    • Nathaneil_Balag's avatar
      Nathaneil_Balag
      Icon for Nimbostratus rankNimbostratus
      Hi Parker, do you have any scenario when I can use this option? I just wander why F5 put this option TImewait and Finwait.
  • Hi All,

     

    Appreciate your answer, Uhm question when do I need to use this close wait setting and Fin wait setting? I did to increase this couz when Im reviewing the packet capture my client sends a RST ACK.