Bug 1171640 - NTP drops requests when sourceport is below 123
Summary: NTP drops requests when sourceport is below 123
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: ntp
Version: 7.1
Hardware: Unspecified
OS: Linux
Target Milestone: rc
: ---
Assignee: Miroslav Lichvar
QA Contact: Jakub Prokes
Depends On: 1171630
TreeView+ depends on / blocked
Reported: 2014-12-08 09:51 UTC by Miroslav Lichvar
Modified: 2015-11-19 08:37 UTC (History)
6 users (show)

Fixed In Version: ntp-4.2.6p5-20.el7
Doc Type: Bug Fix
Doc Text:
The ntpd daemon dropped incoming NTP packets if their source port was lower than 123 (the NTP port). As a consequence, clients behind Network Address Translation (NAT) were unable to synchronize with the server if their source port was translated to ports below 123. With this update, ntpd no longer checks the source port number, and clients behind NAT are now able to correctly synchronize with the server.
Clone Of: 1171630
Last Closed: 2015-11-19 08:37:38 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Network Time Protocol 2174 0 None None None Never
Red Hat Product Errata RHSA-2015:2231 0 normal SHIPPED_LIVE Moderate: ntp security, bug fix, and enhancement update 2015-11-19 09:03:04 UTC

Comment 7 errata-xmlrpc 2015-11-19 08:37:38 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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