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  1. or download this
    /proc/sys/net/ipv4/tcp_timestamp
    /proc/sys/net/ipv4/tcp_window_scaling
    /proc/sys/net/ipv4/tcp_sack
    
  2. or download this
    /proc/sys/net/ipv4/ip_no_pmtu_disc
    
  3. or download this
    /proc/sys/net/core/rmem_default      (default receive window)
    /proc/sys/net/core/rmem_max          (maximum receive window)
    ...
    
    /proc/sys/net/ipv4/tcp_rmem    (memory reserved for TCP rcv buffers)
    /proc/sys/net/ipv4/tcp_wmem    (memory reserved for TCP snd buffers)
    
  4. or download this
    /proc/sys/net/ipv4 # cat tcp_wmem
                           4096    16384   131072
    
    /proc/sys/net/ipv4 # cat tcp_rmem
                           4096    87380   174760