Installing ConfigServer Firewall (CSF)

http://configserver.com/cp/csf.html

If you get the following error during installation:

Checking Perl modules...
Can't locate LWP/UserAgent.pm in @INC (@INC contains: /etc/csf /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8 .) at (eval 19) line 2.
BEGIN failed--compilation aborted at (eval 19) line 2.

Then you need to install perl-libwww-perl package (as well as its prerequisites).

yum install perl-Compress-Zlib perl-HTML-Tagset perl-URI perl-HTML-Parser perl-libwww-perl

OpenVZ VPS CentOS Linux setup notes

OpenVZ VPS running CentOS Linux, setup notes:

To change the timezone:

[root@voyager asterisk-1.8.18.0]# date
Sat Nov 17 06:12:49 MSK 2012

[root@voyager etc]# ln -sf /usr/share/zoneinfo/EST /etc/localtime

[root@voyager etc]# date
Fri Nov 16 22:13:52 EST 2012

Make sure to restart your VPS and also check the syslog daemon that it has its time properly. I noticed I had to restart the syslog daemon service to get the date and time updated.

service syslog restart

How to determine the version of Exchange and Exchange Service Pack level

http://support.microsoft.com/kb/152439

Also try running the following commandlet from an Exchange Management Shell:

Get-ExchangeServer -Identity ExServer1 | Format-Table Name, AdminDisplayVersion

Full list of the Exchange Server Updates with build numbers and release dates:

https://technet.microsoft.com/en-us/library/hh135098(v=exchg.150).aspx 

Create Self-Signed Certificates for Exchange 2010

http://careexchange.in/how-to-use-a-self-signed-certificate-in-exchange-2010/

Also make sure to download the CA root certificate from step 16 and install the CA Root Cert onto all client computers.

Hyper-V 2012 Notes

To enable PING on Hyper-V Server 2012:

netsh firewall set icmpsetting 8

To enable File & Printer Sharing through filewall:

netsh advfirewall firewall set rule group=”File and Printer Sharing” new enable=Yes

To install .NET Framework 3.5 on Hyper-V Server 2012:

dism.exe /online /enable-feature /featurename:NetFX3ServerFeatures
dism.exe /online /enable-feature /featurename:NetFX3

To get a list of features on Hyper-V Server 2012:

dism.exe /online /Get-Features

Utility to backup virtual machines running on Hyper-V Server:

http://hypervbackup.codeplex.com

Create a Scheduled task to run daily at 10pm:

schtasks.exe /Create /SC DAILY /ST 22:00 /TN BACKUP /TR c:\pathto.cmd

How to setup a custom port for Smarthost in SBS2008

Here is how you can set up a custom SMTP port when using a Smarthost in Small Business Server 2008.

1. Log into the server with administrative rights.
2. Click on Start -> All Programs -> Microsoft Exchange Server 2007 -> Exchange Server Console.
3. Click on Organization -> Hub Transport -> Send Connectors tab.
4. Make a note of the name of your send connector (ex. Windows SBS Internet Send SERVERNAME)
5. Click on Start -> All Programs -> Microsoft Exchange Server 2007, then right click on Exchange Server Shell and select open as administrator. Accept the UAC prompt
6. Type in the following command: set-sendconnector –identity ‘Windows SBS Internet Send SERVERNAME’ –port 465
7. Port 465 must match the Smarthost settings.

How to receive an e-mail alert when your linux server or linux VPS restarts

Here is a quick tip on how to receive an e-mail alert if your linux server or linux VPS restarts:

1. Log into your linux server or VPS using ssh.
2. Type in crontab -e into the commandline.
            Depending on the default text editor, it could be nano or vi. Here are the directions for vi:
3. Press insert button on your keyboard.
4. Then type in @reboot echo "Rebooted, now online" | mail -s "`hostname` REBOOTED" you@yourdomain.com
5. Then type in :wq to save and quit the vi text editor.

If your default text editor is nano, then the commands to type in are:

3. Find a new line or create one by pressing the Enter key.
4. Now type in on one line:

@reboot echo "Rebooted, now online" | mail -s "`hostname` REBOOTED" you@yourdomain.com

5. Then press CTRL and X on the keyboard to save.
6. Press Y to save the changes. Press Enter to exit.

If you want to send the e-mail to multiple people, edit the line to show this instead:

@reboot echo "Rebooted, now online" | mail -s "`hostname` REBOOTED" -c "user2@yourdomain.com" you@yourdomain.com

Now you will receive an e-mail alert when your server or VPS reboots. Very handy in troubleshooting issues with your VPS provider or your own server.