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Create a Bootable Ubuntu USB Flash Drive the Easy Way PDF Print E-mail
Tecnical Articles - Technical Articles
Written by James Raaymakers   
Thursday, 24 November 2011 20:30

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/

 

Last Updated on Thursday, 24 November 2011 20:31
 
Configure ClearOS as an SMTP Gateway to an Internal Messaging Server PDF Print E-mail
Tecnical Articles - Technical Articles
Written by James Raaymakers   
Friday, 11 November 2011 14:21

 

  • 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.

  • 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.

Last Updated on Friday, 11 November 2011 14:36
 
How to Reset Your Forgotten Windows Password PDF Print E-mail
Tecnical Articles - Technical Articles
Written by James Raaymakers   
Tuesday, 01 November 2011 07:14

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

Last Updated on Friday, 04 November 2011 06:43
 
Install Webmin on Redhat based systems including ClearOS.... PDF Print E-mail
Tecnical Articles - Technical Articles
Written by James Raaymakers   
Sunday, 08 May 2011 10:06

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/

Last Updated on Sunday, 08 May 2011 12:20
 
Users Recieving Delayed Notification After Sending a Meeting Update or Meeting Cancelation. PDF Print E-mail
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Tecnical Articles - Technical Articles
Written by James Raaymakers   
Wednesday, 14 April 2010 08:09

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.

           


 

 

Recommendation:

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"

 
How To Change The Joomla Icon In The Browser Address bar PDF Print E-mail
Tecnical Articles - Technical Articles
Written by James Raaymakers   
Saturday, 27 February 2010 10:44

This will explain how I changed the Joomla Icon in the browsers address bar and page tab. 1st this works on Joomla 1.5 as it appears most templates use the admin favicon.ico.  

There are 2 websites where you can create an icon on line.

http://tools.dynamicdrive.com/favicon/

http://www.degraeve.com/favicon

After creating your icon, rename the current favicon.ico to faviconico.old in the //administrator/templates/Khepri directory then upload your new favicon.ico in it's place. That worked for me.

 

 

Last Updated on Saturday, 27 February 2010 10:45
 
Beware of RansomeWare! PDF Print E-mail
Tecnical Articles - Technical Articles
Written by James Raaymakers   
Friday, 29 January 2010 10:30

Please read this MSNBC article on RansomeWare. This is malware that takes control of your computer and holds it ransome until you pay the author money for a license key. Even though you pay the criminal still has control of your computer and will hold it for ransome again. Whats worse is you would be giving your credit card number to a criminal. You get these RansomeWare programs from visting websites. To learn more about these very serious threats read the article by clicking the link above. Read all the comments too, as there is additional information from readers who have experienced the ransomeware themselves.

Last Updated on Friday, 29 January 2010 10:32
 
Ubuntu Loads GRUB Promt After Update (WUBI) PDF Print E-mail
Tecnical Articles - Technical Articles
Written by James Raaymakers   
Monday, 22 February 2010 16:42

A copy of this is in my Forums for discussion....

I installed WUBI 9.10 on a Dell Inspiron 5100 32bit. Was running great till I updated it. After updating it booted to a SH:GRUB> prompt. I did some online research and found a series of commands to get booted into Ubuntu 9.10 then from a terminal window run >sudo update-grub2 which fixed the issue. The key for me was figuring out whether I was on sda, sda1 or sda2 and which version I was on. Checkout the below commands

sh:grub> linux /boot/vmlinuz-2.6.31-19-generic root=/dev/sda2 loop=/ubuntu/disks/root.disk ro
sh:grub> initrd /boot/initrd.img-2.6.31-19-generic
sh:grub> boot

After typing "sh:grub> linux /boot/vm" press the TAB key. You get a list of choices. Use the newest vmlinuz-x.xx-xx-generic. Do not use the TAB key for any of the other parts of the command, for example the root=. It will not give you a good list. I've BOLDED the only variables in these commands. The version and the sda?. Also note that in the "initrd" command the version must be the same.

Once you are booted into Ubuntu, open a terminal window and type "sudo update-grub2", press enter, type your root password, press enter again. If you do not see any errors you should be ok. Try to reboot and it should boot ok.

Thats what fixed it for me. Hope this helps for you too.

Here is the forum I found my fix on...

https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/477104 

James

Last Updated on Monday, 22 February 2010 16:57
 
Something To Remember When Taking an Exchange Mailstore Offline With a BES Server PDF Print E-mail
Tecnical Articles - Technical Articles
Written by James Raaymakers   
Sunday, 24 January 2010 21:01

I learned this this last weekend. You have a Blacberry Enterprise Server in your Exchange 2003 environment. You have an Exchange Server with multiple Storage Groups and need to take a few mailstores offline for an extended amount of time. I would make sure the BES-ADMIN mailbox gets moved to a mailstore that is not going offline. If it is on one of the mailstores that is going offline, your BES will will not forward messages as it is unable to access the BES-ADMIN mailbox.  Your Application Event log will begin filling up with 10277 Errors from the Blackberry Messaging Agent saying "Blackberry Messaging Agent (ServerName) Agent 1 failed to start, Error code 5305"

 
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