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ntp: open server socket only when access is allowed

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When changing access configuration, check if any address is allowed and
open/close the server socket as needed.
This commit is contained in:
Miroslav Lichvar
2015-01-06 15:12:26 +01:00
parent 5214d42c07
commit 52e12e42e5
4 changed files with 78 additions and 12 deletions
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chrony.texi.in
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@@ -2523,10 +2523,12 @@ pool pool.ntp.org iburst maxsources 3
@node port directive
@subsection port
This option allows you to configure the port on which @code{chronyd}
will listen for NTP requests.
will listen for NTP requests. The port will be open only when an address is
allowed by the @code{allow} directive or command, an NTP peer is configured, or
the broadcast server mode is enabled.
The compiled in default is udp/123, the standard NTP port. If set to 0,
@code{chronyd} will not open the server socket and will operate strictly in a
@code{chronyd} will never open the server port and will operate strictly in a
client-only mode. The source port used in NTP client requests can be set by
the @code{acquisitionport} directive.