david.barker@LIGO.ORG - posted 10:42, Thursday 31 July 2014 - last comment - 10:47, Thursday 31 July 2014(13109)
Port scan on H1FE network appears to have crashed h1broadcast0 daqd process
After first verifying that no critical measurements were being taken, I performed an nmap port scan of the H1FE VLAN. This caused the daqd process on h1broadcaster to fail, it was subsequently restarted by monit.
I ran the port scan a second time, and h1broadcast0 daqd did not fail this time.
The log files show a correlation between port scan and the failure. I will exclude all DAQ hosts from future port scans.
log file for this event attached.