Fortinet, Mail relaying

FortiMail – Howto configure DLP

René Jorissen on October 27, 2016 0 Comments • Tags: #action #configure #datalossprevention #dlp #fortimail #fortinet #header #howto #profile #rule #scan

The previous post showed the steps necessary to enable DLP. This post describes the workflow to configure DLP. I needed DLP to relay outbound messages to a specific mail relay based on header information. At first I create a DLP rule to define the matching conditions. I match specific header information, which is added to a message … Read More

Fortinet, Mail relaying

FortiMail – Howto enable DLP

René Jorissen on October 25, 2016 1 Comment • Tags: #data #datalossprevention #dlp #enable #fortimail #fortinet #howto #loss #prevention #set

FortiMail has the option to use Data Loss Prevention as enhanced security mechanism. This feature is introduced in firmware 5.3, according to the release notes. By default the DLP option is not visible on the GUI. DLP can be enabled via the CLI, but it is a well hidden feature. The option can be enabled … Read More

Mail relaying

SMTP Auth testing via CLI

René Jorissen on June 30, 2016 0 Comments • Tags: #auth #cli #commandline #smtp

Just a quick note to describe the procedure for SMTP auth testing via the command-line. At first you need to encode username and password in Base64. This can be done in several ways. The easiest way would be via https://www.base64encode.org/. Next you can use the following commando’s via telnet to test SMTP AUTH. I always use … Read More

Mail relaying

Export StartTLS certificate from SMTP server

René Jorissen on May 5, 2015 2 Comments • Tags: #certificate #export #smtp #smtpoffice365com #starttls

While configuring Office365 as the messaging (SMTP) server within Aruba ClearPass, I needed to upload the certificate from the StartTLS session to the certificate trust list from ClearPass. I had to export the certificate for smtp.office365.com via the following OpenSSL command: openssl s_client -showcerts -starttls smtp -crlf -connect smtp.office365.com:587 After running the command, you will see … Read More

Mail relaying

Barracuda – Mail Protocol Violation

René Jorissen on September 8, 2009 1 Comment • Tags: #barracuda #firewall #mail #protocol #spam #violation

A customer updated the firmware from a Barracuda SPAM &Virus 300 firewall. The firmware was upgraded from version 3.4 to version 3.5.12.024. After the upgrade no email was coming in or going out through the Barracuda firewall. All email was blocked and the following reason was visible in the message log: Mail Protocol Violation At … Read More

Mail relaying

Secret Barracuda Spam firewall options

René Jorissen on May 4, 2009 1 Comment • Tags: #ampexpert #ampexpert1 #1 #advanced #barracuda #extra #firewall #option #secret #spam

While troubleshooting a Barracuda Spam Firewall 300 I found a forum on internet, which shows you how to get an extra tab under the Advanced configuration of the Barracuda Spam Firewall. The “secret” configuration page is enabled with the following steps: Logon to the Barracude Spam Firewall 300; Click on the Advanced tab; Add &expert=1 … Read More