Displaying 2 results from an estimated 2 matches for "sessionless".
2018 Sep 06
6
rsyslog listening on high port
Attempting to lookup why rsyslogd is listening on the high port
UDP/51427. Have not succeeded in what this port is used for and what
directive controls what interface it binds to.
[root at bedrock ~]# netstat --listen --inet --program --numeric | grep syslog
udp??0??0 0.0.0.0:51427??0.0.0.0:*???66655/rsyslogd?
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Adam Tauno Williams <mailto:awilliam at whitemice.org> GPG D95ED383
2018 Sep 07
0
rsyslog listening on high port
...og set up to send to a remote log server, where
ss reports that the process has UNCONN state on high UDP ports.
I suspect it's part of the UDP handshake that rsyslog uses for sending
syslogs, but I'm not familiar enough with how it works to say
definitively. Since it's UDP, it's a sessionless protocol, so it's
not strictly LISTENing, but with ss you can see it's UNCONN, which
other daemons that *are* listening for UDP traffic also report.
It is quite interesting to me, and if anyone knows why this works this
way, I'd be happy to hear. I did some tests with 'nc -u'...