Nowadays I able to play around with flow data. Flow provide detail information on network traffic, for various purpose such as network monitoring, bandwidth monitor, traffic accounting archive and for security purpose. We have configured a layer 2/3 switch to send sflow data to my monitoring server. Some visualization were done by nfsen, but, its […]
The concept lies on logging slow performing application or scripts, to know which task are the most difficult to be completed on time. From there, you will know which task taking too much time and most probably resources, and need to be optimize to make sure it doesn’t affect the other tasks to be completed […]
As I go along managing a few sites, managing a few servers before, most of my time online were spent studying on socializing, information security, server administration (security, optimization), and others. ‘Others’ might contribute to a bigger portion, but just to emphasize that one part of server administration is optimization, to make a software work […]
This is necessary thing to do if you have access to many servers, and too many configurations to remember and typed, from the user, hostname and port number. You can make this short with ssh alias. ssh alias allow you to connect your remote machine just by words. # ssh mymachineor # scp file.txt mymachine:~/ […]
iPhone users jailbroke their iPhones to circumvent any blocking by the original IOS firmware, and allow them to have more control over the phone, with regards to software installation and so on. I have a friend who jailbreak his phone, and it look tedious. I dont really know, because I dont have an iPhone. Jailbreaking […]
Do you receive something like this? Check your spam folder, you might missed it, thanks to effective spam filter by your provider. For simple analysis, you can try identify where it comes from. From the mail header, it will tell you which email server does it come from. In some cases, some email server will […]
I bet most of us still do not have the idea of rising internet threats nowadays. It seems irony, as everyone goes online and relying their business to the internet, they still tend to be the victim, and become part of the darkside of the internet without them knowing. One scenario that we might think […]
I’ve gone through a process of migration of a server, with help with provided migration scripts, and some hard-coded scripts to help synchronizing latest data, and permission fixing. All done well, and working fine now. However, all installation of services were default, and did not optimized for our needs. There are few aspect of tuning […]
What is phishing anyway? From Wikipedia, the word phishing means a criminally fraudulent process of attempting to acquire sensitive information from users such as username, password and credit card details by masquerading as a trustworthy entity in electronic communication. Wikipedia:Phishing Nowadays, you must receive at least one phishing email, containing phishing URL, every time you […]
Last few weeks I found a malicious script installed on my hosting server. This is due to unupdated WordPress, that allow remote attacker to upload some malicious code into the server. The server have been clean up, no more problem. 🙂 The malicious file found is a PHP script, with alot of hacking tools embedded. […]