Browsing loại
News
Best SQL Server Performance Monitoring Tools and Software Comparison and Reviews
onitoring SQL Server for Performance, Up-time and other crucial stats is one of the most important tasks you can do in order to keep your database server software running smoothly and efficiently. We've compiled a list of the top SQL…
TCP/IP vs. OSI: What’s the Difference Between the Two Models?
When we are talking about layer 2 switches and layer 3 Ethernet switch, we are actually referring to the layers of a generic protocol model—Open Source Interconnect (OSI) model. It is a commonly used in describing network…
Layer 2 vs Layer 3 Switch: Which One Do You Need?
Generally, if you want to connect all network devices and client devices in a network, a Layer 2 switch is one of the basic devices that you need. When you traverse between LANs (local area networks)/VLANs (virtual local area networks) or…
Remove Internal Exchange Server Names and IP Addresses from Message Headers
When you send an email message, the recipient can view the headers of the message and see all of the “hops” that the message went through on its journey from one mailbox to another.The header info is very useful in troubleshooting…
Cisco ASA Disable ESMTP Inspection
ProblemYesterday my colleague Ben called me over to the help-desk and asked “Have you ever seen this before?” This was what was on his screen.220 ***************************************************SolutionUsually when…
Why do you see XXXXXXXA after EHLO and “500 #5.5.1 command not recognized” after…
IntroductionThis document describes why you see "XXXXXXXA" in mailserver communication and TLS failures associated with the Cisco Email Security Appliance (ESA).Why do you see XXXXXXXA after EHLO and "500 #5.5.1 command…
Cisco Bug: CSCsh33982 – (E)SMTP Multiple Content-Type headers check is wrong
Last ModifiedSep 23, 2017Products (1)Cisco ASA 5500-X Series FirewallsKnown Affected Releases7.2(1.25) 7.2(2)Description (partial)Symptom:
The SMTP inspection make checks of the header Content-Type and…
Exchange 2013 / 2016 Enabling TLS 1.2
I have recently been working with a customer to upgrade to Exchange Server 2016, one of the requirements is to enable TLS 1.2. The following will guide you through the preparation, implementation and then testing.For the testing I…
Exchange Server TLS guidance Part 3: Turning Off TLS 1.0/1.1
OverviewIn part 3 of our Exchange Server TLS Guidance series, we introduce how to turn off TLS 1.0 and 1.1 in your Exchange Server deployment. Turning off TLS 1.0 and 1.1 can be a highly disruptive event if not planned and executed…
Exchange Server TLS guidance Part 2: Enabling TLS 1.2 and Identifying Clients Not Using It -Part 2
OverviewIn part 2 of our Exchange Server TLS Guidance series we focus on enabling and confirming TLS 1.2 can be used by your Exchange Servers for incoming and outgoing connections, as well as identifying any incoming connection which…