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Top Forums UNIX for Advanced & Expert Users Nearly Random, Uncorrelated Server Load Average Spikes Post 303044156 by Neo on Saturday 15th of February 2020 10:14:42 PM
Old 02-15-2020
So, let's try this:

Code:
iptables -A INPUT -s 117.144.138.130/24 -j DROP  #  rogue chinese bot
iptables -A INPUT -s 116.232.49.231/24 -j DROP  #  rogue chinese bot

Empty the "trap" again and block two Chinese subnetworks with rouge, unidentified bot activity.

Honestly, this is starting to "annoy me a lot" in the possibility that these performance hits, and all the time I am spending to find the cause of these hits / spikes, wasting valuable "time in life" is related to rouge, unidentified bots from Chinese networks.

If this continues, I am going to start blocking Chinese networks at the /16 and /8 levels (entire networks).

First, let's see if this is indeed the main source of these spikes. As we all know from situational awareness theory and the famous OODA loop by John Boyd.
  1. OBSERVE
  2. ORIENT
  3. DECIDE
  4. ACT

Already, we have enough information to ACT. But lets continue to OBSERVE Smilie

The loop goes on ... and on ....

Please note that we cannot trust apache2 modules and other third-party software to automatically block IPs, because this can results in blocking the "good bots" which are important for search engine optimization and site traffic.

That means, if this is confirmed that these kinds of bots continue to be the cause of problems, then I will need to DECIDE how to deal with this situation moving forward. I think point in time, I am going to continue to "trap and trace" before making a decision. However, it does seem, at this point, that rouge, unidentified bots from Chinese networks are causing performance issues and need to be "dealt with".

If anyone else has experienced similar issues and has an interesting potential solution to this problem, please reply and share your ideas.

Thanks!

PS: I may consider automating this, as follows:
  1. Capture network session activity when one minute load average exceeds a threshold (as I am doing now).
  2. Filter results captured in the DB based on "hitcount" and "country".
  3. If the "hitcount" exceeds a certain threshold and "country" is in an array of "known to have rouge bots countries".
  4. THEN BLOCK the ip_address/24
 

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IBID.INI(5)						     Ibid - Multi-protocol Bot						       IBID.INI(5)

NAME
ibid.ini - Configuration file for Ibid DESCRIPTION
ibid.ini contains all the configuration for an Ibid bot. A complete description of the contents of this file is out of the scope of this manpage. For more details see the Ibid documentation: http://ibid.omnia.za.net/docs/ Lines beginning with # are considered to be comments and ignored. To use a # symbol in an option (e.g. an IRC channel name), quote the option with double-quotes, e.g. channels="#ibid", This file will be written to by the bot when configuration settings are altered online. It can also be edited manually and a running bot told to "reload config". Manual edits and comments will be preserved when the bot modifies its own configuration, provided that they have not been edited since bot start-up or the last config reload. SECTIONS
auth Settings related to permissions and authentication. Permissions listed in auth.permissions are granted to all users unless revoked by source or account. sources Sources are Ibid connections to an IM service. They range from IRC networks to the bot's built-in HTTP server. Each source is configured in a section named after the source. The source name will define the driver that the source should use, unless a type option is provided. Sources can be disabled by setting disabled=True. plugins Plugin configuration. Each plugin is configured within a section named after the plugin. cachedir The directory that temporary files (such as downloaded data), useful to be the bot but expendable, is stored in. core.autoload If True, all plugins not explicitly ignored will be loaded. (Note that some plugins mark themselves as non-auto-loadable). Defaults to True. core.load The list of plugins (or plugin.Processors) to load. core.noload The list of plugins (or plugin.Processors) to ignore and not load. core.names The names that the bot should respond to. core.ignore Nicks that the bot should completely ignore (e.g. other bots). EXAMPLE
botname = joebot logging = logging.ini [auth] methods = password, timeout = 300 permissions = +factoid, +karma, +sendmemo, +recvmemo, +feeds, +publicresponse [sources] [[telnet]] [[timer]] [[http]] url = http://joebot.example.com [[smtp]] [[pb]] [[atrum]] channels = "#ibid", nick = $botname type = irc auth = hostmask, nickserv server = irc.atrum.org [plugins] cachedir = /tmp/ibid [[core]] names = $botname, bot, ant ignore = , [databases] ibid = sqlite:///ibid.db FILES
logging.ini A standard Python logging.config configuration file describing loggers, handlers, and formatters for log messages. See http://docs.python.org/library/logging.html SEE ALSO
ibid(1), ibid.ini(5), twistd(1), http://ibid.omnia.za.net/ Ibid 0.1 March 2010 IBID.INI(5)
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