Following a recent upgrade of cacti from 0.8.7g to 0.8.7h i noticed a problem with the poller output. When the poller attempts to parse the output in order to generate rrdtool update command, the output is incorrectly interpreted as a hexadecimal number and the resulting update command looks like this:
11/16/2011 08:55:35 AM – POLLER: Poller CACTI2RRD: /usr/bin/rrdtool update /var/lib/cacti/rra/server_520_333.rrd –template 1321433734:2.0177678937406E+118
Servers by default display information via Apache and PHP that makes them vulnerable. With Apache, the version number and installed module versions are listed at the bottom of 404 error pages and on HEAD requests. With PHP, because it runs on our servers as CGI, when it processes php scripts, it adds the “X-Powered By” and displays the version number. In both cases this is not desirable as attackers can use such information to compromise the server.
People using Nagios 3.2.0 will encounter a bug when daylight saving kicked in over the weekend. The bug results in a scheduling problem where service and host checks are no longer executed. This can be confirmed by checking the scheduling queue : all hosts and services will be scheduled to be checked at 11 PM.
Follow the steps below to resolve the problem.
If you are using tsclient, a remote desktop client, and you connect in full screen mode it can be difficult to switch back to your linux session because there is no ‘connection bar’ at the top.
To toggle full screen mode, use the key combination Ctrl+Alt+Enter.