Monitoring - How to monitor a website for free with email/sms

There is an interesting website that give opportunity to monitor external websites and get immediately email alerting.

I think that screesnhots is quite enough to explain service:

http://Downnotifier.com

[update 2019.01.05]

While downnotifier.com does a good job, it's not really user-friendly and doesn’t work quite fast.
I did some exploring and found the other tool below. It's ad-free, quite straightforward and fast to load and I wanted to suggest you show it alongside the other one:

https://www.websiteplanet.com/webtools/down-or-not

This tool allows you to check if your website is down across the globe or only on your computer screen, and it’s quite quick and easy to use (and it's completely free, too!) : -)

[update 2020.07.03]

Here it is another website with similar monitoring free features.

https://uptimerobot.com/

Exchange 2007/10 - “ 451 4.7.0 Timeout Queues Timeout”

During last years we faced to a very strange problem along Exchange queues that got stacked with a rarely and particular error:



“ 451 4.7.0 Timeout”

To better undestand where it was problem we enabled verbose logging on each Exchange server Hub Transport that faced problems to send intrasite and externally emails:

There was “ 451 4.7.0 Timeout” as you can see.

Then we executed ping command with a particular parameter to understand if there was some packed dropped during connection:

And ping computer_name or IP_address -f -l 1472 was unsuccessfully. (http://support2.microsoft.com/kb/159211/en-us )

So, following this article, we understood that it was a networking problem and we opened a major case to MPLS provider and we solved after their intervention.

https://social.technet.microsoft.com/Forums/en-US/6197ce1e-2ba0-46d4-a3d4-3799d6c4ee9c/470-timout-waiting-for-client-input-with-big-emails-on-some-domains?forum=exchangesvrsecuremessaginglegacy

[update 2016.06.07]

Here they are articles about MTU and ping parameter and how to enable verbose logging on exchange server about send/receive connectors


How to Troubleshoot Black Hole Router Issues

SMTP Routing in Exchange 2010 (Part 4)

Tips - How to install DHCP role on windows client XP/Vista/7/8/10

It is possible to install DHCP role on Windows client XP/Vista/7/8/10

Here they are major steps to be followed:

1. Download and configure binaries as a service.
2. Proceed to setting up software 
3. Verify though browser IPs leased to clients.

Here they are some screenshots:





It is important to configure WebServer Feature to check, in real time, that IP are correctly leased:

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Here they are other old blog article related to DHCP (English and italian language)

Server - Commands to verify Domain Controller/Domain Status, schema version, move 5 PDC roles, export DHCP

Windows 2012 R2 - DHCP cluster/failover

2008 R2 Server - Migrare facilmente un server DHCP dal 2003 al 2008

2012 - Migrare il DHCP Server al Windows 2012 Server

Server - DHCP evoluzioni dal 2000 al 2012

2012 server - DHCP Failover in Windows Server 2012

Linux - 1/2 - Installare un Server DHCP su Linux Centos

Linux - 2/2 - Installare un Server DHCP su Linux Centos

Server - Trasformare il proprio pc in DHCP, TFTP, DNS, SNTP e Syslog

Wsus - how to move repository from one drive to another

If you need to move WSUS 3.0 SP2 repository from a drive to another without download again patches you can proceed in this way:

1. Locate Wsus packages drive and folder
2. Locate wsusutil that should be similar to this examplificative path C:\Program Files\Update Services\Tools
3. give this command line:

wsusutil movecontent  contentpathdestinationpath logfile

For Example

wsusutil movecontent e:\packages d:\move.log

here is official Microsoft article that is exaustive on WSUS 3.0 SP2 

Manage WSUS 3.0 SP2 Storage

https://technet.microsoft.com/en-us/library/dd939905(v=ws.10).aspx

Software - How to recover O.S. password

About password recovery I found this tool Lost Windows Password Key, it is not free but it work fine.

Usually I utilize Pc Login 2.0 that is free and work fine as Live CD/DVD/USB drive

Pc Login Download:

http://www.download3k.com/Install-PCLoginNow-2.0.5.html

You can review blog USB live section to learn about how to create USB 

http://www.alessandromazzanti.com/search/label/CD%20Live

http://www.alessandromazzanti.com/search/label/USB

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Here is a briefly revies about Lost Windows Password Key:



http://www.lostwindowspassword.com/how_it_works/how_it_works_cd.htm

With this tool you would be able to:

• Recover or reset all user and administrator passwords
• Reset passwords with a bootable CD/DVD
• Reset Domain Administrator Password (enterprise lincese)
• Reset passwords with a bootable USB drive (Pro and Ent. license)
• Win XP to 10 and Windows Server sull support

Here they are some screenshots that show how to reset windows password with Bootable USB drive

Here is different versions compare table of this product:

http://www.lostwindowspassword.com/purchase/purchase.htm

Veeam - QNAP and Veeam Deduplication and OffSite Backup Replication

Veeam B&R with Plus license gives the ability to enable Veeam Backup copy feature on differente sites utilizing Deduplication option to minimize Bandwidth usage.

But there is an alternative way to override Veeam Plus licence purchage

You should buy on each site QNAP storage (that has plenty of advantages and very aggressive price) and utilizing deduplication features that this product provides.

Utilizing QNAP as local Veeam Backup repository backup deduplication can work with a remote Qnap with settings that you prefer.

More information about this solution and QNAP features here they are.

https://www.qnap.com/i/useng/business_solutions/con_show.php?op=showone&cid=17

Other blogs articles about veeam and qnap here they are:

Server - how to expose QNAP iscsi storage to Vmware based system

NAS – QNAP TS-469-PRO-EU Network Storage Server QNAP

All Veeam blog articles:





[update 2019.05.13]

Here they are updated links to all QNAP Storage products:

https://www.qnap.com/it-it/product/