It’s really just a small thing, but very practical for me: In Wireshark, a feature request I submitted has been implemented. Now, when you click on an ICMP error, the corresponding (original) packet is highlighted. Previously, clicking on a packet belonging to a flow would…
The troubleshooting in IP networks is not easy, because a network swallowing can be based on many causes. However, professional admins know ways to shorten the classic and mostly elaborate troubleshooting. For example, you can Sources of error based on ICMP feedback from … Source…
You are admin and your network is ailing. Where do you start troubleshooting? Our tip: Top your network patients according to ICMP symptoms. Many lead directly to the cause. If you have to treat network swallowing, Wireshark is considered one of the favorite tools of…
I did a presentation at Sharkfest’24 Eu in Vienna, the “Wireshark Developer and User Conference“, about the topic: “Unveiling Network Errors – A Deep Dive into ICMP ‘Destination Unreachable’ Messages“. It covers the following: “Effective troubleshooting of network issues is a critical concern… Source link…
It’s so far – My colleague Florian and I started a podcast! The Security-as-a-Podcast deals with network security-but not in the classic “We explain the RFCs” style, but rather from the perspective of two people who themselves … Source link Author: legendary Johannes Weber
There are recurring cases where tasks cannot be edited quickly and easily using the classic Palo Alto Networks GUI or Panorama. For example, editing multiple policies at oncesuch as during a zone migration. Or checking which policies haven’t log forwarding enabled, hence enabling it directly…….
The Network Time Protocol (NTP) is widely used to synchronize computer clocks. The Precision Time Protocol (PTP) can be used as a time source as well, which is expected to be accurate within microseconds. However, at Microsoft Azure VMs, PTP-derived time-of-day errors could exceed 50,000……
I just got a few emails from an administrator of a medium-sized company, asking some IPv6 questions. They want to use IPv6 to reach the Internet, using two ISPs, while remaining IPv4-only on their internal networks. For whatever reason, they came across three different ideas…
