When implementing NTP servers, it’s always an interesting part to check whether the server is “up and running” and reachable from the clients. While I’ve done many basic NTP checks out of Linux, I lacked a small docu to do this with Windows. It turned…
During my IPv6 classes, I discovered a (minor) bug at the NGFW from Palo Alto Networks: ICMPv6 error messages, such as “time exceeded” (type 3) as a reply of traceroute, or “destination unreachable” (type 1) as a reply of a drop policy, are not correctly…
For the last few years, I have been confused about Palo Alto NGFWs’ various options for configuring an IPv6 address on a layer 3 interface. Let’s have a look at some details: I’m using a PA-220 with PAN-OS 10.2.4-h2. My Defaults Normally, I’m enabling IPv6…
Meinberg, with the great help of Mr Weber, has implemented “syslog over TLS” in the LTOS version 7.06. The following report describes the general advantages of “syslog over TLS” and the implementation of it in the LTOS. Why “Syslog over TLS” is a Good Idea…
More and more security-related devices are capable of sending syslog messages via an encrypted TLS channel. So does the well-known Meinberg LANTIME NTP server with its “LTOS” operating system. (And all the other LTOS-based NTP servers like the IMS or SyncFire series.) Here’s how you…
For my IPv6 training classes, I was missing a capture of a stateful DHCPv6 address assignment. That is: M-flag within the RA, followed by DHCPv6 messages handing out an IPv6 address among others. Therefore, I set up a DHCPv6 server on an Infoblox grid and…
Finally! With PAN-OS 11.0 Palo Alto Networks introduced an “instant commit”. That is: You no longer have to commit (and wait and wait and wait) until your changes are live, but everything you do is IMMEDIATELY active. Just as on any other firewall, e.g., the…
For administrative purposes, SSH is used quite often. Almost everyone in IT knows it. Keywords: OpenSSH, simply using “ssh <hostname>” on your machine, PuTTY for Windows, username + password or public key authentication, TCP port 22, simple firewall rules, ignoring the fingerprints… Source link Author:…
