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Exchange Server serious vulnerability reported

A Security Researcher named Dirk-jan Mollema has recently discovered a vulnerability that affects Exchange and described a way that this vulnerability can be exploited to allow an attacker to obtain escalated privileges. The attack relies on two key components to be successful. Firstly by using a man-in-the-middle attack method against an Exchange Server to perform an NTLM relay attack ( an attacker intercepting the authentication process). This in itself isn’t actually an real Exch

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Configure The Azure Web Application Firewall

Azure Web Application Firewall (WAF) is a function of the Azure Application Gateway that detects and prevents exploits and attacks to a web application. Using a WAF we add an additional security layer in front of our application. To have a sneak peak at the most common web application attacks, take a look at the OWASP Top 10 Most Critical Web Application Security Risks . At my previous posts we have seen how to Protect your Web App using Azure Application Gateway Web Application Firewall and Use

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How to find who plays with Exchange Objects

One of the audit tasks that you may need to do while your operation on exchange server is how to find out by whom and when an Exchange Object was Created, Modified, or deleted mainly for troubleshooting purposes. You can easily do that using exchange management shell: Search-AdminAuditLog -ObjectIds “ObjectName” –StartDate  (date) –EndDate (date) Note: The ObjectIds parameter accepts a variety of objects, such as mailbox aliases, Send connector names, and so on. If you want to specify more

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Serverless Computing | Email Report Azure WAF Logs

At this post, we will create a Logic App that will query the Log Analytics workspace for the WAF logs of the last 24 hours and send the results in an email, using a free SendGrid account. A Web Application Firewall protects your application from common web vulnerabilities. Azure provides enterprise grade Web Application Firewall through the Application Gateway. You can read more at my previous post: https://www.e-apostolidis.gr/microsoft/azure/protect-your-web-application-with-azure-application-

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Exchange 2019 preferred architecture released!

Microsoft Exchange Team has released the official Exchange 2019 preferred architecture (PA) document. The document is updated with the new features of Exchange 2019 including the brand-new MetaCache Database (MCDB) feature and the increase in physical cores and memory limits. As always the document is a must for every admin that wishes to proceed to Exchange 2019 . You can donwload the document here.   Happy Reading!!!

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azure free smtp relay using sendgrid

Azure offers free smtp relay using the SendGrid application. SendGrid is a cloud service that provides email delivery and marketing campaigns. The specific offer is for up to 25.000 emails per month. Also this offers provides full reporting and analytics and 24/7 support. At this post we will see how to create a SendGrid free account that can be used for many purposes, like: Send emails through an application using the SendGrid API Send email campaigns, newsletters, etc using the SendGrid SM

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Leave an Azure Subscription – Directory

Working as a Cloud Consultant, Administrator, Architect, many companies will provide you guest (Azure AD B2B) access to their subscription. After completing the Admins of the subscriptions, many times, forget to remove this accesses and as a result you still have access to resources with no reason and also the list of your available subscriptions grows making it difficult to choose the right subscription to work. In this post we will walk through the steps of removing your account from those sub

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How to create Office 365 Signatures wite ease

Hello to all. Recently i stumbled in client request asking if there is a way  to centrally configure Signatures for the employees without the need of a 3rd party tool. Fortunately there is an easy way in Office 365 to do this. Here is how : 1) First of All you need to create a Transport Rule in EAC and choose to Build a Custom Rule 2) Then you need to define the disclaimer text to be included in the rule. The trick here that you can use HTML Tags therefore have fields that will be replace acc

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Disk gets full while migrating to Exchange 2016

A common issue when migrating to a new exchange version is the exhaustion of the log space resulting migration failures. Of course you can not simply go and delete those files because this will lead to more problems than the original one. One migitation to this problem is to run a full backup in order to clear the files and release the space.The other way is to enable circular logging which can be done before you start the migration in order to prevent the problem from happening in the first pl

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Exchange Server 2019 Now Available

Just now Exchange Product Group announced the availability of the long-awaited Exchange 2019!!!!. There are several new and exciting features in this release and its the first time that Microsoft recommends install into Server Core!!!. Here are some of the new features: 1) Exchange Server can use up to 48 processor cores and 256GB of RAM. 2) Dual storage read/write capabilities to Exchange Server 2019 using Solid State Drive (SSD) technology to provide a super-fast cache of key data for impr

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Create an Ultra High Available on-prem Azure VPN Connection

Create an Ultra High Available on-prem <-> Azure VPN Connection At this post we will see how to make a high available connection between our on-premises network and Azure. This way we will have an Active-Active Dual-Redundancy VPN Connection. The idea behind this is that we have a router/firewall cluster,connected with two ISPs and we want to also have a VPN connection with Azure using both ISPs actively. I call this an end-to-end high available connectivity between our on-premises infrast

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Serverless Computing | Check your expired public certificates

Connect two or more Azure Virtual Networks using one VPN Gateway Peering is a feature that allows to connect two or more virtual networks and act as one bigger network. At this post we will see how we can connect two Azure Virtual Networks, using peering and access the whole network using one VPN Gateway. We can connect Virtual Networks despite if they are in the same Subscription or not. I have created a diagram to help understand the topology. We have a Virtual Network with Site-2-Site VPN

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Azure Storage Advanced Thread Protection

Azure Storage Advanced Thread Protection Azure Storage Advanced Threat Protection is a new security feature, currently in Preview. It monitors the Azure Blob Storage accounts. It detects anomalies and uncommon access to the Storage Account and notifies the admins through email. All the Azure Storage Advanced Threat Protection monitoring and logs are integrated to the Azure Security Center, including the well known ASC recommendations. It’s so easy to enable, just go to the Azure Portal, navigate

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Connect two or more Azure Virtual Networks using one VPN Gateway

Connect two or more Azure Virtual Networks using one VPN Gateway Peering is a feature that allows to connect two or more virtual networks and act as one bigger network. At this post we will see how we can connect two Azure Virtual Networks, using peering and access the whole network using one VPN Gateway. We can connect Virtual Networks despite if they are in the same Subscription or not. I have created a diagram to help understand the topology. We have a Virtual Network with Site-2-Site VPN

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Azure Backup | Enable backup alert notifications

Azure Backup | Enable backup alert notifications Azure Backup generates alerts for all backup events, such as unsuccessful backups. A new option is to create backup alert notifications so Azure Backup will alert you firing an email when an alert is generated. To enable the backup alert notifications, navigate to the “Backup Alerts” section of the “recovery Services vault” and click the “Configure notifications” There switch the Email notification to On to enable the alerts. Enter one or more re

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Azure Portal Tip | Virtual Machines bulk actions

Azure Portal | Virtual Machines bulk actions Azure Portal is a great GUI tool to administer all your Azure Resources and it continues evolving. Here is a very useful Tip. Did you know that you can manage Virtual Machines in bulk using the Azure Portal VIrtual Machines section? We have virtual machines bulk actions! Not only we can Assign Tags, Start, Restart, Stop and Delete Virtual Machines in bulk but also configure Change Tracking, Inventory and Update Management!! Filter out the Virtual Mac

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Application security groups

Application Security Groups to simplify your Azure VMs network security Application Security Groups helps to manage the security of the Azure Virtual Machines by grouping them according the applications that runs on them. It is a feature that allows the application-centric use of Network Security Groups. An example is always the best way to better understand a feature. So let’s say that in a Subnet we have some Web Servers and some Database Servers. The access rules of the Subnet’s Network Secu

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Ασφαλίστε την Azure MySQL και PostgreSQL με τη χρήση Service Endpoints

Ασφαλίστε την MySQL και την PostgreSQL με τη χρήση Service Endpoints Σε προηγούμενο post, Ασφάλισε την Azure SQL Database μέσα σε ένα VNET χρησιμοποιώντας service endpoints, είδαμε πως μπορούμε να χρησιμοποιήσουμε τα Service Endpoints του Azure Virtual Network για να ασφαλίσουμε μια Azure SQL για πρόσβαση μόνο από εσωτερικό δίκτυο.   Σήμερα, το Microsoft Azure, ανακοίνωσε την γενική διαθεσιμότητα του Service Endpoints για MySQL και PostgreSQL. Αυτό δίνει την δυνατότητα να κόψουμε όλη την Publ

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Harvard Business Review (HBR): AGILE AT SCALE

By now most business leaders are familiar with agile innovation teams. These small, entrepreneurial groups are designed to stay close to customers and adapt quickly to changing conditions. When implemented correctly, they almost always result in higher team productivity and morale, faster time to market, better quality, and lower risk than traditional approaches can achieve.   Read the full article here: https://hbr.org/2018/05/agile-at-scale

Theofanis.Giotis

Theofanis.Giotis

 

Microsoft Azure Blog: What is Artificial Intelligence?

MICROSOFT AZURE BLOG: WHAT IS ARTIFICIAL INTELLIGENCE? August 10, 2018 Pantelis Apostolidis Azure Leave a comment   This post is reposted from the Microsoft Azure Blog : What is Artificial Intelligence? <azure.microsoft.com/blog/what-is-artificial-intelligence/> Aug 9th 2018, 12:00, by Theo van Kraay It has been said that Artificial Intelligence will define the next generation of software solutions. If you are even remotely involved with technology, you will almost certainly have heard

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Monitor & Alert for your Azure VM

Monitor & Alert for your Azure VM Lets see how easy it is to monitor and create an alert, in order to be notified when your VMs are restarted, when they start, stop, get high CPU usage, memory and much more. First navigate to the Azure Portal https://portal.azure.com, and then click the Monitor button. You will be navigated to the Monitor blade. At the center of the screen you will see three mail buttons, each starts a wizard. Click the “Create Alert” under the Explore monitoring essential

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Monitor & Alert for your Azure VM

Monitor & Alert for your Azure VM Lets see how easy it is to monitor and create an alert, in order to be notified when your VMs are restarted, when they start, stop, get high CPU usage, memory and much more. First navigate to the Azure Portal https://portal.azure.com, and then click the Monitor button. You will be navigated to the Monitor blade. At the center of the screen you will see three mail buttons, each starts a wizard. Click the “Create Alert” under the Explore monitoring essential

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Azure Storage | Static Web Site

Azure Storage | Static Web Site Το Microsoft Azure ανακοίνωσε την δυνατότητα να φιλοξενεί στατικές ιστοσελίδες απευθείας στο Blob Storage, με το κόστος του Blob Storage! Τι σημαίνει αυτό? Για 1 GB χώρο και 100000 views το κόστος είναι περίπου 0,05 ευρώ το μήνα! Στις στατικές ιστοσελίδες μπορούμε επίσης εκτός από στατικό περιεχόμενο να έχουμε και CLient Side Scripting οπως JavaScript αλλά όχι Server Side Scripting. Επίσης μπορούμε να δώσουμε και μια Custom σελίδα που θα γυρίζει αντί για 404. Μπορ

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