Red Hat Bugzilla – Bug 57945
time-udp still does not work properly with xinetd
Last modified: 2007-04-18 12:38:51 EDT
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User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)
Description of problem:
time-udp often does not respond, even when it is running and connections
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Start xinetd with time-udp enabled.
2. Use rdate -u from various other machines to try to connect.
Actual Results: The service will sometimes repond, and sometimes not.
time-udp appears to always serve connections originating from the same
machine, and no others. Sometimes (often after a restart), it may serve
requests to other machines. It is definately hit-and-miss, but with more
misses than hits and is pretty easy to reproduce.
Expected Results: The service should always respond.
Redhat 7.2 running xinetd-2.3.4-0.1 .
tcpdump and /var/log/secure reveal all requests arriving. There are no
filters in place.
"wait" has been tested as both "yes" and "no" with similar results.
xinetd-2.3.4-0.3 was tried but does not start (see bug #57944).
See also bug #56487.
I have some more information on this that might help track down this bug...
after enabling some logging, I see that xinetd logs the message "Possible
Denial of Service attack from X.X.X.X X", despite there only being one
I've also tried to install intimed, in an attempt to get a time server
working. xinetd instead logs the message "Deactivating service time due to
excessive incoming connections. Restarting in 30 seconds." after any
connection attempt. Again, this is after only a single connection.
Adding a (high) cps value to the service configuration does not change this.
It should be fixed in xinetd-2.3.4-0.4 (the 2002-01-04 devel snapshot, available
*** Bug 60335 has been marked as a duplicate of this bug. ***