Showing posts with label always. Show all posts
Showing posts with label always. Show all posts
Tuesday, February 7, 2017
Three 3 always habits to prevent your facebook account from being hacked
Three 3 always habits to prevent your facebook account from being hacked
1. Always unchecked the keep me logged in box before signing in. Highly recommended, when you are using computers in cyber cafe’s, friends and classmates. To be safer unchecked it even in your own PC.
2. Always log out your facebook account?
3. Always erase your browser’s history and cookies.
Facebook account hacking is rampant now a days, if you follow these habits it will not make your facebook account invincible from hacking but at least it is now harder for them to do so.
Available link for download
Monday, November 28, 2016
TCP Wrapper that ALWAYS logs denials
TCP Wrapper that ALWAYS logs denials
During teaching of a class this week, one of my students noticed that the vsftpd service was being denied by his TCP Wrapper rules in /etc/hosts.allow and /etc/hosts.deny, but that nothing was being logged into /var/log/messages. He then asked me if there was still a way for the TCP Wrapper to start a process as an option. I told him about both the spawn and twist options, and referred him the to the hosts_access and hosts_options man pages. After both of us experimenting a little bit, we came up with the solution that all allow rules should be in /etc/hosts.allow and that /etc/hosts.deny should look something like this:
ALL:ALL:spawn (logger TCP wrapper in /etc/hosts.deny denied %c access to %d)
With this rule, anything that gets denied will be logged by spawn starting the logger process in a subshell (thus the parentheses) and that it would report the client (%c) who was attempting to connect to the daemon (%d). Now, anytime a denial is suspected, the /var/log/messages file can be checked for a TCP Wrapper message.
Available link for download
Wednesday, November 2, 2016
Upon Turn on Computer Always Beeping and No Display
Upon Turn on Computer Always Beeping and No Display
Have you encounter upon turning on the computer unit, it only beeps and no display in your monitor screen. This kind of error is repairable at all time without cost. The beep codes depends what devices are connected inside your system unit ( some non techie person call it a CPU), is the computer has separate graphics card or it is using a built-in graphics comes with motherbord.
If this error happen take note in your mine; the power supply, motherboard and processor are most likely working. You have to listen first what kind of beep you hear and go directly where the problem is.
Common motherboard beeps and its equivalent error
- 1 long beep and three (3) short beeps – Video Card Error
Video card loose contact or defective - try to reseat the graphics card from PCI-express slot and if you have an older PC just reset the graphics card in Accelerated Graphics Port (AGP). If the motherboard has onboard vga try to connect the vga cable into it and see if the PC boots up. Some motherboard model need to reset the CMOS settings in order to shift the Display from PCI-Express / AGP Video Card to its built-in vga.
- Long Continuous beep (It never stop until you turn off the computer) - Memory Error
Memory Loose Contact or Defective Memory – Remove the memory from its slot, and clean the memory including the memory slot. If it still doesnt work try to insert to another slot or try another memory.
Note: Avoid inserting memory in reverse position.
- Short Continuous beep (It never stop until you turn off the computer) - Memory Error
Replace Memory – but try to check the memory in another computer.
Unusual motherboard beeps and its equivalent error
- Continuous Short beeps 3 to 5 seconds and stops – Motherboard or Processor Problem
Most of the the time this kind beep is a motherboard error if the motherboard is 4 years old and above. Time for replacement. You may consider resetting the processor it also helps sometime.
If the computer is full of dust, clean it and see if works.
Available link for download
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