The ramblings of a computer geek
IPerf is a tool that can be used to measure the bandwidth and quality of a network link. Its a useful little tool, so I’ll introduce some of the basics of how you can use it to perform some tests. Bear in mind this is not an exhaustive guide, there are many tweaks that can … Read more
Very occasionally my Ohme Pro charger loses its connection to the Nissan LEAF API which it uses to determine the battery status, this doesn’t affect the charging of the car, but just means it reports incorrect information and grumbles to say the “car isn’t charging how we’d expect”, even though it is. Ohme customer car … Read more
Attempting to play a multicast stream from Windows VLC Player, was seeing the IGMP Snooping picking up something from my machine, but not the join to the specific group (channel/stream) I was trying to view. I was attempting to get to a stream: udp://@239.4.6.0:1234 Resolution To resolve the problem, it turned out to be VirtualBox, … Read more
I’ve found that managing your time is the most important and most effective thing you can do in your day to maintain productivity. If you’re like me having endless unnecessary interruptions means you can’t get into “the zone” and have periods of deep concentration required to actually do useful work. Endless flipping from task to … Read more
To explore how DKIM validation works first got an email in .eml format as an example email which was a known good email where the DKIM validation is OK. Meaning that both the header and the body are unchanged from when the email was first DKIM signed. There is a little tool called “dkimpy”, which … Read more
Although I’ve covered this before if you want to add some headers into a test email, this can be done by just adding the required header into the “DATA” section. In the example below I’m adding in a header called “List-Id”. You would telnet into your mail server then type in the following:
Attempting to purchase an in-app purchase (to buy coins) in Minecraft on an Amazon Fire Tablet I was constantly being told that my Amazon password was incorrect. The issue turned out to be down to OTP being enabled on my Amazon account, using Google Authenticator. To resolve the issue, it involved entering the password, with … Read more
If you need to perform a Ping scan of a subnet, you can use the following command, its quick and dirty approach, although its not really that quick when it comes to actually running. The below will scan the subnet 192.168.1.0/24, from 192.168.1.1 to 192.168.1.254. If you want to speed things up a bit, you … Read more
The lowly Format command provides some simple, yet fairly effective data destruction for hard disks that you have on your machine. Although this technique may not be suitably effective for all data destruction requirements, it is fairly thorough in the destruction of data on a disk; such as one you wish to reuse for another … Read more
Time spent in meetings is time spent not working on tasks. Meetings however are essential, but also must be structured and conducted in a way to ensure they are not wasting valuable time. A way of ensuring this is a robust “meeting etiquette”, i.e. rules of engagement to ensure that your time is not unduly … Read more