Linux, programming and more
The original Plugin was written by Chris Bair, after some tunings it worked fine for me.
I made some useful modifications to this Plugin:
– Visualization of the number of Drafts
– Set table prefix (I hate hardcodet things)
And now how to use it, first you need to create a configuration file for the plugin(replace the needed credentials) [Read more…]
Some of my servers providing FTP service and I check every weekend all the uploaded and system files for viruses and rootkits.
If somebody starts a upload, nobody think about potential danger e.g. virus.
You can start all this checks separated or as a script.
Here are some examples: [Read more…]
It was a little bit strange situation, I found my outer interface in a PROMISC mode.
“ip a” or “ifconfig” output shows that my eth0 interface was in the PROMISC mode, but I don’t understand, why?
1 2 | eth0: <broadcast,multicast,promisc,up,lower_up> mtu 1500 ... </broadcast,multicast,promisc,up,lower_up> |
I don’t used tcpdump or similar tools in this moment.
After I spend some time to my favorite search engine, I found how to disable manually this mode:
1 | ifconfig eth0 -promisc |
Sending IP packets on a multiaccess network requires mapping from an IP address to a MAC address (physical/hardware address like 00:02:b6:34:6a:2f).
In an ethernet environment, ARP is used to map a MAC address to an IP address.
ARP dynamically binds the IP address to the correct MAC address.
You need a SSH Access to your juniper to proceed!
Show all ARP entrys:
1 | ssg5-> get arp |
Clear all dynamic entries from the ARP cache.
1 | ssg5-> clear arp all |
Also you can clear a single ARP entry:
1 | ssg5-> clear arp 192.168.201.9 |
Maybe you know this problem, if more than one user has root access to a server you have very little chances to control who was it. The only hook could be date and time. Default if you issue the “history” command you see a command number and the operation.
Put the next line in your .bashrc and you will see date and time in your history:
1 2 | # Bash Timestamps export HISTTIMEFORMAT="%F %T " |
Finely to make it work execute:
1 | source .bashrc |
Your new history format:
1 2 3 4 5 | 536 2011-05-31 22:06:44 less /var/log/syslog 537 2011-05-31 22:06:46 ll 538 2011-05-31 22:06:54 vim rssh.pl 539 2011-05-31 22:07:07 perl rssh.pl 540 2011-05-31 22:07:16 ss -lnp |