An excellent TechNet-article explained how rules are evaluated in Windows Firewall, specifically in what order and which rules take precedence over others.
The actual serial number of a Barracuda NG Firewall can be obtained remotely in two ways:
A note of caution: when installing the Fortinet SSO Agent on a server, the option to secure connections from a FortiGate with a password is enabled by default, and a random password is assigned.
You have to turn off or change the password before you add the SSO agent in your Fortigate.
There's no mention of this in the manuals, so now you know...
To block traffic from/to a specific IPv4 address using iptables, you can use these commands:
iptables -A INPUT -s 126.96.36.199 -j DROP iptables -A OUTPUT -d 188.8.131.52 -j DROP
Contains newest and old releases.
Last year, around May, DynDNS.com has changed their root certificates, causing Dynamic DNS using DynDNS.com no longer to work properly. The error (Network Error) is displayed immediately after adding the account to your Sonicwall.
The easiest solution is to upgrade to the latest firmware:
Dell Support also offers an alternative, although this only works with more recent 5.9 versions:
Important for PPPoE connections on a Dell Sonicwall: with the current firmwares, the MTU is not automatically lowered to 1492 when using PPPoE as your WAN interface type. By default, it remains on 1500, so you need to manually adjust it to 1492.
This can be done by going in to the interface properties → Advanced, where you'll find a field to set the MTU.
Restarting OpenVPN on the CLI of a pfSense can be done using the following command:
echo "<?php include('openvpn.inc'); openvpn_resync_all();?>" | php -q
This issues a restart command as if you would via the web-interface.