Sudden application crash in servers Post: 303009785

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Operating Systems HP-UX Sudden application crash in servers Post 303009785 by vbe on Wednesday 20th of December 2017 03:44:40 AM

12-20-2017

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The scanner is not in the server but somewhere on your network, internal I hope, or it may be an attack as mentionned... so in internal it seems there is something looking like a such device at the IP I pointed out - Check!
Years ago I had many HP-UX crashes once a month till I decided to write at the direction saying those "non-intrusive" devices were all but that and crashing HP servers or some mainframe devices, mostly the ones trusted and having/using NFS, the reason is mainly it opens so many connections id doesnt care for itself (MS.. OS?) but on a UNIX server the timeouts are regularly over 5 minutes so a opened port cannot be used till it is cleaned and so in such cases quickly you run out and then no one can connect, not even root and you are doomed... Once I proved where it came from the HP servers were listed out the scanning process... and now they changed system, but I have no more HP either... If you have NFS mounted on that server and the scan manages to make it unreadable then your system depending what is running will try to read desperatly and it s load will go beyond control till the system crashes...

vbe

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netload

netload(1)						      General Commands Manual							netload(1)

NAME

       netload - Network device load monitor

SYNOPSIS

       netload device [-t <secs>]

DESCRIPTION

       netload	displays the load on an interface without using the interface.	netload simply accesses kernel statistics.

       netload	uses  ncurses  to  display the information, and the use of a gauge to show the network load.  It shows the absolute load, relative
       load,  and  other  statistics, as well as the maximum load on the system so far.

       Interface is the name of your NIC, ppp, etc..  as  shown  in  ifconfig.	Typical names are "ppp0" "eth0" or "lo" (the latter is for  local-
       host).

       CONFIGURATION

       Netload file $HOME/.netloadrc allows you to add any number of network interfaces, modify the alarm settings and your email preferences.

       The first time that netload is run it generates $HOME/.netloadrc , which should be changed to fit your preferences.

OPTIONS

       -t refresh-interval
	      The -t flag reprensents the refresh rate of the application. The default is 1 second

EXAMPLES

       netload eth0

FILES

       ~/.netloadrc Per user configuration file

LICENSE

       You may redistribute copies of it under the terms of the GNU General Public License <http://www.gnu.org/licenses/gpl.html>

AUTHOR

       Luis Falcon (lfalcon@thymbra.com)

USER COMMANDS
							   November 1996							netload(1)