The Raaymakers Family

This is really cool. Bring Ubuntu Linux with you where ever you go.

http://www.howtogeek.com/howto/linux/create-a-bootable-ubuntu-usb-flash-drive-the-easy-way/

• Only 1 NIC needed
• Install ClearOS in Standalone Mode
• Manually configure network settings
• Install the GUI, AntiMalware, AntiPhishing, SMTP and Mail Scanning modules.
• After reboot the basic setup wizard launches
• Set Language – Next
• Verify Network Settings – Next
• Set Timezone – Next
• Either leave default settings in Domain or type another domain name. But make sure this is NOT the same as any of your forwarded domains. I would just leave it set at the default clearos.loc – Next
• Enter all your organization info , leave Internet Hostname at default – Next
• Finished, click Firewall to get to the Firewall config in the Webconfig page.
• In the “Add Firewall Rule” section add the following “Standard Services”…SMTP, SSH and Webconfig as seen below.

• Click “Server” in the left menu pane to expand and then click “SMTP Server
• In the “Trusted Networks” section, delete all the networks that you do not have, and add yours if it was not there already. Don’t forget the /xx network mask.
• In the “Mail Forward Domain List” add all your domains and the IP of the messaging server responsible for that domain.
• DO NOT start the SMTP service yet.
  

• In the left Menu Pane click “Aliases”
• Click the edit button next to each alias and add a real internal email address in the "External E-Mail Address" field such as This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

• Then click “Add”.

• Then remove the check from the default entry and click the “Update” button.
• Then click the “Back” button to do the same thing to the next alias.

*****************************************************************************************************

• Launch your SSH client and SSH to your mail gateway and login.
• Add the following to the main.cf by typing

------------------------------------------------------------------------------------

cd /etc/postfix

postconf -e "local_transport = error:No local mail delivery"
postconf -e "mydestination = "

postconf -e "relay_recipient_maps =”

postconf –e “relay_domains = hash:/etc/postfix/relay_domains”

nano relay_domains

-------------------------------------------------------------------------------------

• The “nano relay_domains” command open a new file named “relay_domains”
• Add all your domains space and “OK” as below.

mymaildomain.com OK

mymaildomain2.net OK

• Press CTRL/X then Y then Enter to save file.
• Type the following command…

------------------------------------------------------------

postmap relay_domains

------------------------------------------------------------

• Open main.cf for editing

---------------------------

nano main.cf

---------------------------

• REM out the below lines at the bottom of the main.cf file if they exist.

---------------------------------------------------------------------------------

#unknown_local_recipient_reject_code = 550

#local_recipient_maps = proxy:unix:passwd.byname $alias_maps

---------------------------------------------------------------------------------

• Modify the “smtpd_recipient_restrictions” so it looks like below.

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_rbl_client zen.spamhaus.org, reject_rbl_client bl.spamcop.net

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

• Press CTRL/X then Y then Enter to save file.
• Go back to the Webconfig page.
• In the left Menu Pane click “AntiMaleware” and click “Start” to start the service.
• In the left Menu Pane click “AntiSpam” and click “Start” to start the service. (You can play with the thresholds to get them to your liking)
• In the left Menu Pane click “SMTP Server” and click “Start” to start the service and then click “To Auto” to make the service start automatically on Boot.
• Click “Gateway” in the left menu pane to expand it.
• Click “AntiPhishing Configuration”
• In the main pane, enable “BlockSSL Mismatch” and “Block Cloaked URLs” then click “Update” button.
• Go back to your Putty session
• Type the following to tail your maillog and verify no errors.

-----------------------------------------

tail -f -n 300 /var/log/maillog

-----------------------------------------

• Test your SMTP server by telneting to port 25 from the command prompt on you computer.

----------------------------

telnet 192.168.1.2 25

----------------------------

• You should see the following…..

220 system.clearos.lan ESMTP Postfix

Done! Just redirect your port 25 to the IP of this server and you should be up and running. Although I would do some more testing like sending to each of your forwarded domains.

Found on https://www.howtogeek.com

Two ways to reset your Windows 7 password. Follow the links to the HowToGeek articles.

How to Reset Your Forgotten Windows Password with the Install CD

How to Reset Your Windows Password Without an Install CD

Link to Article - http://www.schoolitexpert.com/Network-Tools/Web-Server-Tools/install-webmin.html

Log on to a terminal session on your web server with a root account. 1.yum install wget

2.wget http://www.schoolitexpert.com/data/software/web/webmin/webmin-1.500-1.noarch.rpm

3.rpm --import http://www.webmin.com/jcameron-key.asc

4.yum install webmin-1.500-1.noarch.rpm

Using Webmin You should now be able to log on to webmin with your web server user account. You will need to add a certificate exception. •https://yourwebserverIP:10000/

Consider the following. You have an Exchange 2003 environment. Users are getting the following message from the Exchange PostMaster account on meeting updates or meeting cancelations they sent to recipients outside your exchange organization.

Subject: Delivery Status Notification (Delay)

This is an automatically generated Delivery Status Notification.

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

Delivery to the following recipients has been delayed.

       This e-mail address is being protected from spambots. You need JavaScript enabled to view it

       This e-mail address is being protected from spambots. You need JavaScript enabled to view it

All recipient addresses check good. You check the Outgoing SMTP Queue on the Exchange Server the users mailbox is hosted on and notice the users message is there with a red dot on the envelope icon indicating delivery has thus far failed and a retry is scheduled.

Normal messages and initial meeting requests go thru to the same outside recipients with no problem. The same outside recipients can accept the meeting request and the sender recieves the accept message.

Then after the meeting update or cancelation sent by the internal user expires in the queue the user will recieve the following NDR message from the system Administrator on the same meeting update or meeting cancelation they sent to recipients outside your exchange organization.

Subject: Undeliverable: Delivery Status Notification (Failure)

Your message did not reach some or all of the intended recipients.

      Subject:    [Subject of Message]

The following recipient(s) cannot be reached:

      This e-mail address is being protected from spambots. You need JavaScript enabled to view it  on 4/8/2010 8:48 AM

            Could not deliver the message in the time limit specified.  Please retry or contact your administrator.

      This e-mail address is being protected from spambots. You need JavaScript enabled to view it  on 4/8/2010 8:48 AM

            Could not deliver the message in the time limit specified.  Please retry or contact your administrator.

Check if the external recipients messaging system is Exchange 2007 or Exchange 2010. If so refer to this Microsoft Knowledgebase Article.

http://support.microsoft.com/kb/938650 

"A meeting update message or a meeting cancellation message from an Exchange 2003 user is not delivered to an Exchange 2007 user"