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Version: v8

TCP Setting

It shows the configuration regarding TCP Setting

Monitor

How to Use:​

  1. Go to System > Instance > (Select Instance) > Setting > TCP Setting
  2. Configure your settings
  3. Click Save Changes

Description​

Congestion Control Algorithm​

Specify the algorithm to be used to avoid congestion

    Accepted values: BBR / RENO / CUBIC

    Default: BBR
Use SYN Cookies​

Enable this to use SYN cookies in case of SYN Flood

    Accepted values: Enable / Disable

    Default: Enable
Read Buffer​

Specify the size of the incoming kernel socket buffer

    Accepted values: Integer

    Default: 65536
Write Buffer​

Specify the size of the outgoing kernel socket buffer

    Accepted values: Integer

    Default: 65536
Max TCP Orphans​

Specify the maximum number of TCP sockets not attached to any user file handle, held by system

    Accepted values: Integer

    Default: 4096
Enable Slow Start​

Enable this behavior to time out the congestion window after an idle period

    Accepted values: Enable / Disable

    Default: Disable
TCP SYNACK Retries​

Specify the number of times SYNACKSs for a passive TCP connection attempt will be retransmitted

    Accepted values: Integer

    Default: 3
TCP SYN Retries​

Specify the number of times SYNs for a active TCP connection attempt will be retransmitted

    Accepted values: Integer

    Default: 3
Enable Window Scaling​

Enable Window Scaling during TCP sessions

    Accepted values: Enable / Disable

    Default: Disable
Enable Timestamps​

Enable to turn timestamps off to reduce performance spikes related to timestamp generation

    Accepted values: Enable / Disable

    Default: Disable
Enable Selective ACKs​

Enable the TCP selective ACKs option for better throughput

    Accepted values: Enable / Disable

    Default: Disable
Enable TCP SACKs​

Enable to allow TCP to send SACKs

    Accepted values: Enable / Disable

    Default: Disable
Enable Duplicate SACKs​

Enable to allow TCP to send duplicate SACKs

    Accepted values: Enable / Disable

    Default: Disable
Enable TCP Fast Open​

Enable TCP Fast Open to send and accept data in the opening SYN Packet

    Accepted values: Enable / Disable

    Default: Disable
TCP Backlog Connections​

Specify the maximum number of remembered connection requests, which have not received an acknowledgment from connecting client

    Accepted values: Integer

    Default: 1500
TCP Keepalive Probes​

Enable to allow TCP to send duplicate SACKs

    Accepted values: Integer

    Default: 5
TCP Keepalive Time​

Specify how often TCP sends out keepalive messages when keepalive is enabled

    Accepted values: Integer

    Default: 1800
TCP Keepalive Interval​

Specify how frequently the TCP probes are send out

    Accepted values: Integer

    Default: 60
TCP FIN Timeout​

Specify time an orphaned connection will remain in the FIN_WAIT_2 state before it is aborted at the local end

    Accepted values: Integer

    Default: 60