yum install spamassassin spamass-milter
yum install perl-Mail-SPF perl-Mail-DKIM perl-Razor-Agent pyzor poppler-utils re2c
chkconfig spamassassin on
chkconfig spamass-milter on
service spamassassin start
service spamass-milter start
vi sendmail.mc

INPUT_MAIL_FILTER(`spamassassin', `S=unix:/var/run/spamass-milter/spamass-milter.sock, F=, T=C:15m;S:4m;R:4m;E:10m')dnl
define(`confMILTER_MACROS_CONNECT',`t, b, j, _, {daemon_name}, {if_name}, {if_addr}')dnl
define(`confMILTER_MACROS_HELO',`s, {tls_version}, {cipher}, {cipher_bits}, {cert_subject}, {cert_issuer}')dnl

make
/etc/init.d/sendmail restart
spamassassin -D < /usr/share/doc/spamassassin-3.3.1/sample-spam.txt 2>&1|grep -i spf

$ diff -u spamd.org /usr/sbin/spamd
--- spamd.org	2011-04-21 23:35:10.000000000 +0000
+++ /usr/sbin/spamd	2011-04-22 00:11:17.000000000 +0000
@@ -1593,7 +1593,10 @@

   my $scantime = sprintf( "%.1f", time - $start_time );

-  info("spamd: $was_it_spam ($msg_score/$msg_threshold) for\
  $current_user:$> in"
+  my @from_addrs = $mail->get_pristine_header("Received");
+  join("\n",@from_addrs) =~ m/(\[\d+\.\d+\.\d+\.\d+\])/;
+  my $from_addr = $1;
+  info("spamd: $was_it_spam ($msg_score/$msg_threshold) from\
  $from_addr for $current_user:$> in"
        . " $scantime seconds, $actual_length bytes." );

   # add a summary "result:" line, based on mass-check format

# Fail2Ban filter for spamass-filter failures
#

[INCLUDES]

before = common.conf

[Definition]

failregex = spamd: identified spam .* from \[<HOST>\]

ignoreregex =

# DEV Notes:
#
# Author:

cat /etc/sysconfig/spamass-milter

### Standard parameters for spamass-milter are:
### -f -P /var/run/spamass-milter.pid
### These run the milter as a daemon and have it write a PID file
###
### You may add another parameters here, see spamass-milter(1)
EXTRA_FLAGS="-r 6"

# less /var/log/httpd/error_log

08:52:28 2016] [emerg] (28)No space left on device: Couldn’t create accept lock (/etc/httpd/logs/accept.lock.9206) (5)

# ipcs -s

# for i in `ipcs -s | awk ‘/apache/ {print $2}’`; do (ipcrm -s $i); done

# ipcs -s

source link https://braaten-family.org/ed/blog/2014-05-28-devtools-for-centos/

Posted on 2014-05-28 by Ed Braaten

# 1. Install a package with repository for your system:
# On CentOS, install package centos-release-scl available in CentOS repository:
$ sudo yum install centos-release-scl

# On RHEL, enable RHSCL repository for you system:
$ sudo yum-config-manager --enable rhel-server-rhscl-7-rpms

# 2. Install the collection:
$ sudo yum install devtoolset-6

# 3. Start using software collections:
$ scl enable devtoolset-6 bash

$ wget http://sourceforge.net/projects/mod-qos/files/latest/download

cd tools

./configure make make install

(replace automake-1.14 with -1.11)

$ cd mod_qos-10.15/apache2/
$ apxs2 -i -c mod_qos.c

[root@us conf.d]# cat qos.conf

LoadModule qos_module modules/mod_qos.so

# minimum request rate (bytes/sec at request reading):

QS_SrvRequestRate                                 120

# limits the connections for this virtual host:

QS_SrvMaxConn                                     100

# allows keep-alive support till the server reaches 600 connections:

QS_SrvMaxConnClose                                60

# allows max 50 connections from a single ip address:

QS_SrvMaxConnPerIP                                 25

# disables connection restrictions for certain clients:

#QS_SrvMaxConnExcludeIP                    172.18.3.32

#QS_SrvMaxConnExcludeIP                    192.168.10.

# allows not more than 20 events/penalty points per 10 minutes:

QS_ClientEventBlockCount                          20

# don’t allow a client to access /app/start.html more than

# 20 times within 10 minutes:

#SetEnvIf     Request_URI /app/start.html          QS_Block=1

# don’t allow more than 4 “403″ status code responses

# (forbidden) for a client within 10 minutes:

QS_SetEnvIfStatus        403                      QS_Block=5

QS_SetEnvIfStatus        301                      QS_Block=2

[root@us conf.d]#

#vmstat 2

#top

#glances

#sar -r

#to be continued …

# yum install freeradius

#yum install freeradius-utils

error_reporting(E_ALL);
class AsyncWebRequest extends Thread {
    public $url;
    public $data;

    public function __construct($url) {
        $this->url = $url;
    }

    public function run() {
        if (($url = $this->url)) {
            /*
             * If a large amount of data is being requested, you might want to
             * fsockopen and read using usleep in between reads
             */
            $this->data = file_get_contents($url);
        } else
            printf("Thread #%lu was not provided a URL\n", $this->getThreadId());
    }
}

$t = microtime(true);
$g = new AsyncWebRequest(sprintf("http://www.google.com/?q=%s", rand() * 10));
/* starting synchronized */
if ($g->start()) {
    printf("Request took %f seconds to start ", microtime(true) - $t);
    while ( $g->isRunning() ) {
        echo ".";
        usleep(100);
    }
    if ($g->join()) {
        printf(" and %f seconds to finish receiving %d bytes\n", microtime(true) - $t, strlen($g->data));
    } else
        printf(" and %f seconds to finish, request failed\n", microtime(true) - $t);
}

mkdir -p /var/lib/mysql2

chown mysql:mysql mysql2

cp -p /etc/my.cnf /etc/my2.cnf
vi my2.cnf

[mysqld]
datadir=/var/lib/mysql2
socket=/var/lib/mysql/mysql2.sock
port=3337

[mysqld_safe]
log-error=/var/log/mysqld2.log
pid-file=/var/run/mysqld/mysqld2.pid



mysql_install_db --user=mysql --datadir=/var/lib/mysql2

mysqld_safe --defaults-file=/etc/my2.cnf &
netstat -antp | grep 3337

mysqladmin -S /var/lib/mysql/mysql2.sock shutdown -p
mysql -S /var/lib/mysql/mysql2.sock -u root -p

[root@ns6 abc.cadena-it.com]# cat .procmailrc

VERBOSE=off

MAILDIR=$HOME/mail # elm users might use $HOME/Mail instead

DEFAULT=/var/spool/mail/abc.macatung.com

LOGFILE=$HOME/log

CLAMDSCAN=/usr/bin/clamdscan

:0

* ^Subject.*( naked | XXX | sex| Van Tai | Hang Khong | Visa )

/dev/null

:0

* ^From.*(MAILER-DAEMON)

/dev/null

:0

{

RESULT=`$CLAMDSCAN –stdout –no-summary -`

:0 Di

* RESULT ?? FOUND

/dev/null

}

[root@ns6 abc.cadena-it.com]#

general.rc

:0
* ^Cc.*joe@somewhere.org
* ^Cc.*me
{
	:0 c
	$DEFAULT

	:0
	SOME_FOLDER
}

:0
* ^Subject.*something-or-other
! another@address.com

lists.rc

:0
* ^From.*owner@independence
independence-list


spam.rc

	  
:0
* ^From.*my-buddy
* ^Subject.*(Fwd|Forward|joke)
/dev/null

:0
* !(To|Cc).*my_address		# this is my account here
* !(To|Cc).*my_address_2	# I get mail forwarded from here
* !From.*my\.domain\.edu	# I trust the locals not to spam
* !From.*list.*@			# don't trash anything from mail lists
* !From.*good-buddy		# sometimes Bcc's me person mail to his sig-other
spam

:0
* ^From.*big-jerk
/dev/null

guestbook.rc

Appendix: egrep regular expressions

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