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- c: Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
- SPDX-License-Identifier: curl
- Long: keepalive-time
- Arg: <seconds>
- Help: Interval time for keepalive probes
- Added: 7.18.0
- Category: connection
- Example: --keepalive-time 20 $URL
- See-also: no-keepalive max-time
- Multi: single
- ---
- This option sets the time a connection needs to remain idle before sending
- keepalive probes and the time between individual keepalive probes. It is
- currently effective on operating systems offering the TCP_KEEPIDLE and
- TCP_KEEPINTVL socket options (meaning Linux, recent AIX, HP-UX and more).
- Keepalives are used by the TCP stack to detect broken networks on idle
- connections. The number of missed keepalive probes before declaring the
- connection down is OS dependent and is commonly 9 or 10. This option has no
- effect if --no-keepalive is used.
- If unspecified, the option defaults to 60 seconds.
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