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    SubjectRe: sysctl_tcp_keepalive_time
    On 16/08/07, Simon Peter <> wrote:
    > Hi,
    > is there any reason why sysctl_tcp_keepalive_time (reflected
    > by /proc/sys/net/ipv4/tcp_keepalive_time) is set to 7200 seconds? Is
    > this specified somewhere?
    RFC 1122, section -

    " TCP Keep-Alives

    Implementors MAY include "keep-alives" in their TCP
    implementations, although this practice is not universally
    accepted. If keep-alives are included, the application MUST
    be able to turn them on or off for each TCP connection, and
    they MUST default to off.

    Keep-alive packets MUST only be sent when no data or
    acknowledgement packets have been received for the
    connection within an interval. This interval MUST be
    configurable and MUST default to no less than two hours.

    This page may also be of interrest to you :

    Also see "man 7 tcp"

    Jesper Juhl <>
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      Last update: 2007-08-16 13:29    [W:0.020 / U:7.784 seconds]
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