[Spacewalk-list] SYN Flooding with OSAD

[Wood, Brendan]

Hey all,

We are up to 560 clients in our spacewalk environment, and today when I restarted jabberd on the server I noticed this in the sys logs:

kernel: possible SYN flooding on port 5222. Sending cookies.

..and none of the clients appear to be able to connect.  Restarting osad on the client end produces:

Shutting down osad:                                        [  OK  ]
Starting osad: Traceback (most recent call last):
  File "/usr/share/rhn/osad/jabber_lib.py", line 252, in setup_connection
    c = self._get_jabber_client(js)
  File "/usr/share/rhn/osad/jabber_lib.py", line 309, in _get_jabber_client
    c.connect()
  File "/usr/share/rhn/osad/jabber_lib.py", line 567, in connect
    jabber.Client.connect(self)
  File "/usr/lib/python2.4/site-packages/jabber/xmlstream.py", line 533, in connect
    self.header()
  File "/usr/share/rhn/osad/jabber_lib.py", line 1189, in header
    self.process(jabber.timeout)
  File "/usr/share/rhn/osad/jabber_lib.py", line 1057, in process
    data = self._read(self.BLOCK_SIZE)
error: (104, 'Connection reset by peer')

Has anyone else experienced this.. or more to the point, come up with a solution?

Thanks!
Brendan
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