Linux




How to choose the password that noone can guess and you cant remember

Of course you know what the good password should be - random letters including capitals, peppered with numbers and enhanced with printable control characters. The only problem with these recommendations is that there are very few people in the world that can memorize such incomprehensible sequence of chars. So if someone …



Top 10 usernames used in SSH brute force

In continuation to yesterday's post I thought it would be interesting to know statistics of the usernames used in those bruteforce probes.Find below awk/sed script to get usernames for failed ssh login attempts and sort it for statistics and also list of the usernames I got from my …



SSH brute force is on the rise, awk script to count failed SSH attempts

SSH brute forcing is still in high demand. I have , for my own testing and pleasure, virtual servers scattered around the world. All of them being of the Linux/BSD family I manage by SSH. Also I have on purpose no static IP at home for various reasons (saving me …



Scan of the week – scan by country scan by continent

Dis+claimer - all this stuff I bring to your attention is for educational purposes only, and what may be fine and ok here and for me can easily get you somewhere else in trouble so use your discretion here . Happy scanning. "...Don't know much about geography" as the song goes …



Ping – setting don't fragment bit in Linux/FreeBSD/Solaris/Cisco/Juniper

Ping. Many times while debugging network problems of various kinds you need to send some packets of desirable size and don’t fragment bit being set. Below I list how to do it for the different equipment/OSes. Let’s start with the most popular operating system among network folks …



Autologin Expect scripts for telnet/ssh

Tired of typing over and over your username/password when using telnet/ssh ? Here are Expect https://core.tcl-lang.org/expect/index scripts to autologin by Telnet and ssh. Note: Yes, it is not secure to keep you username/password saved somewhere, so know what you do . In my opinion …



find tool patterns

These are few find patterns I find useful in a daily work. The ones below were of great help when I had to clean Esafe that had more than 100,000 files in the spool ! So usual shell wild-card expansion didn't work (try to do ls in a folder with …