Monthly Archives: May 2015

On January 27, 2015, a GNU C Library (glibc) vulnerability, referred to as the GHOST vulnerability, was announced to the general public. In summary, the vulnerability allows remote attackers to take complete control of a system by exploiting a buffer … Continue reading →

Config The workings of Amanda all center around one or more config directories you set up We currently have only one configuration set up to dump all the workstations and it is called allAll of the Amanda commands need the … Continue reading →

On September 24, 2014, a GNU Bash vulnerability, referred to as Shellshock or the “Bash Bug”, was disclosed. In short, the vulnerability allows remote attackers to execute arbitrary code given certain conditions, by passing strings of code following environment variable … Continue reading →

how you can reject these DDOS attempts via the fail2ban package. These events look something like this: System Events =-=-=-=-=-=-= Jan 21 06:02:13 www named[32410]: client 66.230.128.15#15333: query (cache) +’./NS/IN’ denied Tired of your DNS server being used as someone’s … Continue reading →

HowTo: Flush nscd dns cache Nscd caches libc-issued requests to the Name Service. If retrieving NSS data is fairly expensive, nscd is able to speed up consecutive access to the same data dramatically and increase overall system performance. Just restart … Continue reading →

1 – Summary NRPE (Nagios Remote Plugin Executor) plugin allows you to monitor any number of remote network devices and services using Nagios. Installing and Configuring a Nagios Server is not part of this HowTo. You will need a nagios … Continue reading →

1. Check HTTP Check whether Apache HTTP is running on a remote server using check_http. $ check_http -H 192.168.1.50 HTTP OK HTTP/1.1 200 OK – 332 bytes in 0.004 seconds |time=0.004144s;;;0.000000 size=332B;;;0 2. Check HTTPS Check whether Apache HTTPS is … Continue reading →

Network Time Protocol (NTP) is a networking protocol for time and date synchronisation between computers. By default, Windows 7 provides five servers (default being time.windows.com) to synchronise with. Time varies based on network latency however with tens of milliseconds over the … Continue reading →