Difference between pages "Package:Sshguard" and "Package:Gzip"

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{{Ebuild
{{Ebuild
|Summary=protects hosts from brute force attacks against ssh
|Summary=Gzip is the standard GNU compressor/decompressor, used to create and expand .gz archives.
|CatPkg=app-admin/sshguard
|CatPkg=app-arch/gzip
|Maintainer=
|Maintainer=Oleg,
|Repository=Funtoo Overlay
}}
}}
__TOC__
Our forked version of Gzip adds a patch to add the <tt>--rsyncable</tt> option, which creates an "rsync-friendly" archive. This option used by <tt>vzdump>/tt> utility
'''sshguard''' is an intrusion prevention system.  sshguard parses server logs, determines malicious activity, and then bans malicious users via firewall rules.  sshguard is written in C so it does not tax an interprator.


== Installation ==
Here is the full description of this option:
=== Emerge ===
To install sshguard:


<console>
<blockquote>
###i## emerge app-admin/sshguard
"While compressing, synchronize the output occasionally based on the
</console>
input.  This reduces compression by about 1 percent most cases, but
 
means that the <tt>rsync</tt> program can take advantage of similarities
=== Configuration ===
in the uncompressed input when syncronizing two files compressed with
sshguard does not have a configuration file.  sshguard is controlled by flags passed to it upon execution.
this flag.  <tt>gunzip</tt> cannot tell the difference between a
 
compressed file created with this option, and one created without it."
/etc/conf.d/sshguard is where flags & log path can be passed to the sshguard service.
</blockquote>
 
==== Rules ====
{{file|name=/etc/conf.d/sshguard|desc=overly strict rules|body=
SSHGUARD_OPTS="-p 3600 -s 3600 -a 20"}}
 
==== Logs ====
sshguard will fail to start unless it has proper authorization logs to monitor.
 
{{file|name=/etc/conf.d/sshguard|desc=syslog-ng log location|body=
SSHGUARD_OPTS="${SSHGUARD_OPTS} -l /var/log/messages"}}
 
== Iptables ==
=== IP v4 ===
Generate blank iptables rules, and start iptables as outlined [[Iptables#First_Run|here]].
 
Insert these rules to allow sshguard to ban malicious users.
 
<console>
###i## iptables -N sshguard
</console>
 
&& to block all trafic from offenders
 
<console>
###i## iptables -A INPUT -j sshguard
</console>
 
== Boot Service ==
=== OpenRC ===
To start sshguard immediately:
<console>
###i## rc-service sshguard start
</console>
 
To start sshguard upon reboot:
<console>
###i## rc-update add sshguard default
</console>
 
== External Resources ==
*http://www.sshguard.net/
*http://www.ohloh.net/p/sshguard
 
[[Category:Security]]
[[Category:Server]]
{{EbuildFooter}}
{{EbuildFooter}}

Revision as of 12:23, June 27, 2014

Gzip

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Our forked version of Gzip adds a patch to add the --rsyncable option, which creates an "rsync-friendly" archive. This option used by vzdump>/tt> utility

Here is the full description of this option:

"While compressing, synchronize the output occasionally based on the input. This reduces compression by about 1 percent most cases, but means that the rsync program can take advantage of similarities in the uncompressed input when syncronizing two files compressed with this flag. gunzip cannot tell the difference between a compressed file created with this option, and one created without it."


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