Monday, 2 May 2016

The Importance of Server Air Conditioning


On the off chance that you run a system, so that your staff can send messages to one another, to exchange archives and information, and to keep reinforcements, then you'll know exactly how essential server aerating and cooling is. In case you're not a system administrator, then this is what you have to know.

1. It's fundamental that the server is at the right temperature, as the server and other related items won't work taking care of business. You'll see that if your server has issues, then it could well be to do with it being at the wrong temperature, or an absence of server cooling.

2. PCs and servers are inclined to overheating, and will quit working legitimately on the off chance that they're excessively hot and there's no server ventilating. Whilst it may be irritating if your portable workstation crashes, or reboots itself, envision what might happen if this happened to the server?

3. Without your server, you can decrease the effectiveness of your IT. Maybe your staff won't have the capacity to work without the data on the servers. Maybe your lifts will quit working. Perhaps your security cameras will crash.

4. In the event that your server fails, then it's feasible that it will need repairing. You may have an in house specialized bolster group equipped for doing this, or you may need to call an on location build and orchestrate a visit, which implies it could take days before your server is sorted out and up and running once more.

5. In the event that your server is hopeless, then it'll need supplanting. This can bring about real downtime, and enormous cost. On the off chance that you weren't persuaded some time recently, you certainly won't think little of the significance of server aerating and cooling now.

6. On the off chance that your server aerating and cooling is not as successful as it could be then maybe you'll have to change the design of your server room so as to enhance air dispersion and show signs of improvement ventilation.

7. You may be in an ideal situation with a committed frosty server room, instead of simply having your servers toward the side of the room. By giving your system servers their own room, you can guarantee that the room is sufficiently icy for your servers to continue working legitimately.

8. It may be that you simply require a little space for your servers. You'll need to guarantee that there; is sufficient ventilation, and that there is the fitting server aerating and cooling with a specific end goal to keep the servers up and running so that the system runs legitimately.

9. A huge server room with server cooling is a smart thought, so you can store your servers and have a lot of ventilation. You may likewise need to have a work station in there, with the goal that you can screen what's going on. You may likewise have the capacity to do repairs and support without taking the server down.

10. It's difficult to put a cost on server ventilating. You won't have any desire to have the dismiss business, or send your staff home in view of the PC framework, and you won't have any desire to need to get out a specialist to supplant your server or other system segments all the time in light of the fact that they overheat. The estimation of server cooling can't be exaggerated.

In case you're sustained up of your system going down, then maybe it's the ideal opportunity for you to introduce server aerating and cooling.
http://arnserver.com/

Installing Asterisk 11 + FreePBX on CentOS 6.5


Step by step instructions for installing software PBX Asterisk 11.x and control panel FreePBX on CentOS 6.5
Conditions:
CentOS installed and has access to the Internet.
Contents

Before install:

1.  # yum -y update
  1. Turn off SELinux:
# vi /etc/selinux/config
3.  # reboot
  1. Additional repos:
5.  # rpm -Uvh http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm 
6.  # rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
7.  # yum -y install mc make gcc kernel-devel gcc-c++ ncurses-devel httpd mysql-server mysql mysql-devel php iksemel iksemel-devel crypto-utils openssl-devel gmime gmime-devel spandsp spandsp-devel openldap openldap-devel popt-devel libresample libresample-devel speex speex-devel libcurl-devel speex-tools svn sqlite-devel mod_ssl php-mysql php-pear-MDB2-Driver-mysqli php-mbstring php-gd php-mcrypt libxml2-devel lame bison audiofile-devel sox php-pear-DB php-posix
  1.  
9.  # cd /root
10.# wget http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-11-current.tar.gz 
11.# tar -zxf asterisk-11-current.tar.gz
12.# wget http://downloads.asterisk.org/pub/telephony/libpri/libpri-1.4-current.tar.gz
13.# tar -zxf libpri-1.4-current.tar.gzwget http://downloads.asterisk.org/pub/telephony/dahdi-linux-complete/dahdi-linux-complete-current.tar.gz
14.# tar -zxf dahdi-linux-complete-current.tar.gz

Installing DAHDI, libPRI and Asterisk

1.  # cd dahdi-linux-complete-2.9.0+2.9.0.1
2.  #make all
3.  #make install
4.  #make config
5.  # cd libpri-1.4.14
6.  # make
7.  # make install
  1.  
9.  # cd asterisk-11.7.0
10.# ./configure --prefix=/usr --exec-prefix=/usr --with-crypto --with-dahdi --with-iconv -with-libcurl --with-gmime --with-iksemel --with-mysqlclient --disable-xmldoc --with-pri --with-spandsp --with-ldap --with-libcurl --with-popt --with-resample --with-speex
11.# make menuselect
12.# contrib/scripts/get_mp3_source.sh
13.# make
14.# make install
15.# make samples
  1.  
17.# ln -s /usr/lib/libasteriskssl.so.1 /usr/lib64/libasteriskssl.so.1
18.# ln -s /usr/lib/libpri.so.1.4 /usr/lib64/libpri.so.1.4
19.# cat contrib/init.d/rc.redhat.asterisk | sed 's/__ASTERISK_SBIN_DIR__/\/usr\/sbin/' > /etc/init.d/asterisk
20.# chkconfig --add asterisk
21.# cp -rf configs/* /etc/asterisk/
  1.  
23.# service dahdi start
24.# service asterisk start
  1.  

Installing FreePBX

1.   # wget “http://downloads.sourceforge.net/project/phpmyadmin/phpMyAdmin/3.5.5/phpMyAdmin-3.5.5-all-languages.tar.gz?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fphpmyadmin%2Ffiles%2FphpMyAdmin%2F3.5.5%2FphpMyAdmin-3.5.5-all-languages.tar.gz%2Fdownload&ts=1358931580&use_mirror=ignum”
2.  # tar -zxf phpMyAdmin-3.5.5-all-languages.tar.gz -C /var/www/
  1. in /etc/hosts:
4.  [IP PBX] pbx-mysql.example.com 
[IP PBX] pbx.example.com
  1. to  /etc/httpd/httpd.conf:
NameVirtualHost *:443
  1. to /etc/httpd/conf.d/ssl.conf:
7.  DocumentRoot "/var/www/phpmyadmin"
8.  ServerName pbx-mysql.example.com:443
9.  ErrorLog logs/ssl_phpmyadmin_error_log
10.TransferLog logs/ssl_phpmyadmin_access_log
11.LogLevel warn
12.SSLEngine on
13. 
14.SSLProtocol all -SSLv2
15.SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW
16.SSLCertificateFile /etc/pki/tls/certs/localhost.crt
17.SSLCertificateKeyFile /etc/pki/tls/private/localhost.key
18. 
19.SSLOptions +StdEnvVars
20. 
21.<Directory "/var/www/cgi-bin">
22.SSLOptions +StdEnvVars
23. 
24.SetEnvIf User-Agent ".*MSIE.*" \
25.nokeepalive ssl-unclean-shutdown \
26.downgrade-1.0 force-response-1.0
27. 
28.CustomLog logs/ssl_phpmyadmin_request_log \
29."%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b"
30. 
31.<Directory "/var/www/phpmyadmin">
32.Order allow,deny
33.Allow from [Admin IP]
34. 
35.DocumentRoot "/var/www/html"
36.ServerName pbx.example.com:443
37.ErrorLog logs/ssl_html_error_log
38.TransferLog logs/ssl_html_access_log
39.LogLevel warn
40.SSLEngine on
41. 
42.SSLProtocol all -SSLv2
43.SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW
44.SSLCertificateFile /etc/pki/tls/certs/localhost.crt
45.SSLCertificateKeyFile /etc/pki/tls/private/localhost.key
46. 
47.SSLOptions +StdEnvVars
48. 
49.<Directory "/var/www/cgi-bin">
50.SSLOptions +StdEnvVars
51. 
52.SetEnvIf User-Agent ".*MSIE.*" \
53.nokeepalive ssl-unclean-shutdown \
54.downgrade-1.0 force-response-1.0
55. 
56.CustomLog logs/ssl_html_request_log \
57."%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b"
58. 
59.<Directory "/var/www/html">
60.Order allow,deny
61.Allow from [Admin IP]
62.# cd /var/www/
63.# ln -s phpMyAdmin-3.5.5-all-languages phpmyadmin
64.# service httpd restart
65.# chkconfig --levels 345 mysqld on
66.# chkconfig --levels 345 httpd on
67.# service mysqld start
68.# /usr/bin/mysql_secure_installation
69.  Change root password for MySQL
70.# cd /root
71.# wget http://mirror.freepbx.org/freepbx-2.11.0.tar.gz
72.# tar -zxf freepbx-2.11.0.tar.gz -C /usr/src 
73.# cd /usr/src/freepbx-2.11.0
  1. Edit php.ini:
75.# vi /etc/php.ini (or /etc/php4/apache2/php.ini)
76.upload_max_filesize=20M
77.# mysqladmin create asteriskcdrdb -p
78.# mysql -p asteriskcdrdb < SQL/cdr_mysql_table.sql
79.# mysqladmin create asterisk -p
80.# mysql -p asterisk < SQL/newinstall.sql 
81.# mysql -p 
82.mysql> GRANT ALL PRIVILEGES ON asteriskcdrdb.* TO asteriskuser@localhost IDENTIFIED BY '[your password]';
mysql> GRANT ALL PRIVILEGES ON asterisk.* TO asteriskuser@localhost IDENTIFIED BY '[your password]';
mysql> flush privileges;
83.# groupadd asterisk 
84.# useradd -c "asterisk PBX" -d /var/lib/asterisk -s /sbin/nologin -g asterisk asterisk
  1. Edit:
86.# vi /etc/httpd/conf/httpd.conf (or /etc/apache2/apache2.conf):
87.User asterisk
88.Group asterisk
89.# chown asterisk /var/lib/php/session
90.# ./install_amp
  1. In the database named asterisk for table named freepbx_settings change password for asterisk manager:
92.# mysql -p
mysql> UPDATE `asterisk`.`freepbx_settings` SET `value` = '[your password 2]' WHERE `freepbx_settings`.`keyword` = 'AMPMGRPASS';
93.# chown asterisk /etc/modprobe.d/dahdi.conf
94.# rm /etc/asterisk/ccss.conf /etc/asterisk/logger.conf /etc/asterisk/iax.conf /etc/asterisk/extensions.conf /etc/asterisk/sip_notify.conf /etc/asterisk/features.conf /etc/asterisk/sip.conf
  1. Change something in freepbx admin panel, click Apply (default username/password – admin/admin)
  2. Change default password

Additional installation:

1.   # yum -y install bind bind-utils mailx ntp
2.  # chkconfig --add named
3.  # chkconfig --add ntpdate
4.  # service ntpdate start
5.  # service named start
6.  # echo “nameserver 127.0.0.1” > /etc/resolv.conf
7.  # echo “nameserver 8.8.8.8” >> /etc/resolv.conf
8.  # yum -y install xinetd tftp-server 
9.  # vi /etc/xinetd.d/tftp
10.-s /tftp -c
11.# mkdir /tftp && 
12.# chown nobody /tftp 
13.# vi /etc/sysconfig/iptables 
14.# service xinetd start
  1.  
  2. Add to iptables config:
 -A INPUT -m udp -p udp -d [IP PBX]/32 --dport 5060 -m hashlimit --hashlimit 10/m --hashlimit-burst 10 --hashlimit-mode srcip,dstip,dstport --hashlimit-htable-expire 180 --hashlimit-name SIP -j ACCEPT

How to start a VOIP Business


*Rates shown do not include E-911 charges or government mandated taxes. Providers offering unlimited calling plans may have restrictions. Read providers terms and conditions carefully before buying.
The first thing to do is decide what part of VOIP marketplace you want to serve. Here are some possibilities:
  • VOIP Provider services
  • VOIP consulting
  • Independent Sales/Service Agent for existing VOIP service providers
  • Value Added services with VoIP
  • etc.

Some general suggestions:
  • Pick an area that plays to your strengths. For example, if your strength is sales and marketing, pick an area where you can leverage those abilities
  • Learn all you can about the maketplace
  • Attend industry tradeshows
  • Read industry magazines, blogs, forums, etc
  • Read books
  • Do market research - talk to your potential customers
  • Ask questions
  • Test the waters — to the extent possible try before you buy, test the waters before making large commitments of time or money

Value Added services
If you have experience with VoIP or already in VoIP business, you can get benifit / new customers by introducesing some value added services on VoIP. Few value added services are mentioned in following, Within each service there are many choices.
  • PBX sales and service
    • Hosted PBX
    • Virtual Numbers
    • Hosted IVR / Auto attendents
    • etc

  • Message broadcasting / Call Center Solutions

  • Prepaid Cards
    • Retail prepaid cards from existing wholesale providers
    • Start your own brand of prepaid cards using services from existing wholesale providers
    • Start a new prepaid card provider company
    • Create new software package for prepaid card services
    • Create a Free Phone Booth
    • etc.