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Processing btmp with PHP for iptables
On linux, lastb is the same as last, except that by default lastb shows a log of the /var/log/btmp file, which contains all the bad login attempts.
This file grows large quickly (sometimes over 100K entries or more in a day) with the constant brute force login attempts, especially by IP addresses from China, but they can be from anywhere.
Today, I wrote this quick PHP file for cron to save me time doing the analysis and creating a file to block these hacking IP nets:
This PHP file reads the existing blockfile (in this case 'cronblocklogs.txt') and the btmp file. Then checks if any IP address in the btmp file has more than some limit (in this case 10) and if it does not already have an entry in the blockfile, adds it and blocks the IP /24. It also does a whois on the IP address and extracts some strings for reference.
It's not very fancy, but it is helpful.
I know there are other ways and packages to do similar things, but sometimes I like to write my own scripts so I have control over what is happening... and do it myyyyyy wayyyyy
Sample input:
Sample Output:
Also, the file:
Normally I will apply this manually after reviewing the file and not automatically, as I like keeping the "human in the loop" in these kinds of tasks.
The crontab entry is also pretty simple, running every 30 minutes at the moment:
Hi,
i have multiple files in a Input directory Say eg: 50 files. I want to process all the fifty files and put it in 5 different files (basically each 5 file contain 10 10 files data total of fifty files).
Is there any script available. pls help.
I tried using the for loop,
eg:
cat *.txt... (1 Reply)
Hello,
One Fedora server is facing the issue that daily /var/log/btmp grows to 2.2Gb or more.
I need your help to determine the cause and isolate it.
Thank you! (6 Replies)
Hello,
I extracted a list of files in a directory with the command ls . However this is not my computer, so the ls functionality has been revamped so that it gives the filesizes in front like this :
This is the output of ls command : I stored the output in a file filelist
1.1M... (5 Replies)
Hi ,
I have a memory file like this with two columns:
@C010 AA
@C011 AA
@C012 FE
@C013 FF
@C014 F7
@C015 FF
first is memory add, second is the data.
I wan to convert into a serial sequence starting from '00000' all the way to 'FFFFF' with those fields from the above file... (15 Replies)
Hello everybody,
I have a little problem with one of my program. I made a plugin for collectd (a stats collector for my servers) but I have a problem to make it run in parallel.
My program gathers stats from logs, so it needs to run in background waiting for any new lines added in the log... (0 Replies)
Dear fellows,
I have Centos 5.4 linux with DNS server, all logs are normal, in my /var/log/ btmp files is getting larger day by day.
What is this btmp file for?
How can i reduce the file siez or control file size.
Waiting.
MAZ (1 Reply)
In simple words of the scenario.
I have some set of files that are to loaded into a table in parallel
Loading part would be taken care of the Abintio graph. I must develop a script which instructs this graph about how to process the files like wat files to process and how to process by... (1 Reply)