My e-mail servers are being hit about 1,000 times a week with robots trying various username and password combinations. This is quite normal given the uncontrolled criminality we see online nowadays. There are many that are clearly working their way through a dictionary of known combinations, such as default passwords...
In 2010 I purchased items from an online store called Pooleys. It soon became apparent they had a security issue as I started to receive SPAM to the unique e-mail address assigned to them. Troy Hunt's amazing haveibeenpwned.com site also confirms the e-mail address is present in "Exploit.In" and "Collection...
Malicious actors are sadly everywhere these days so maintaining a good security posture for servers is essential. Last night I was enjoying watching this Mexican IP - 187.205.205.34 (dsl-187-205-205-34-dyn.prod-infinitum.com.mx) "lifting the door handles". You'd hardly call three to four attempts per minute a brute force attack. Perhaps it was to...
Following on from my post last year about the upcoming new charges in AWS for public IPv4 addresses, I've found more optimisations some might find useful.I like to have things all "under one roof" but often the financial savings are worth having a couple of different suppliers. AWS charge users...
A decision by my Internet Service Provider (ISP) has left me perplexed. They produce monthly invoices in PDF format and deliver them to me via e-mail and are password-protected using "the last 4 digits of the phone number associated with your account". The password approach is made clear in each e-mail. It's...
Will the upcoming new AWS charges help stop our addiction to IPv4 or is Amazon "taxing fresh air", that is, charging us for something that's hard to give up? Uptake of IPv6 has been painfully slow (see https://aws.amazon.com/blogs/aws/new-aws-public-ipv4-address-charge-public-ip-insights) but for a user of EC2 for personal services at home I will...
I am currently working on numerous projects for the Solis/Ginlong inverter using the ESP32 S3 microcontroller. For these projects I needed these connectors and have bought a bucket load for resale. These genuine Exceedconn connectors are in stock and you can buy them from my eBay store. Same day dispatch...
This article is work in progress and at this time is a scratch space so I don't lose my notes. After some research it seems the internet is full of really bad advice on setting up postfix on Ubuntu. Most articles will get you up and running but leave you...
Some useful URLs
For many years now I've wanted to tackle the problem of SPAM e-mail. The source is quite simple, it comes from phishing attacks where you enter your e-mail address into a fake site, or idiotic chain e-mails that contain countless addresses. Perhaps even more sinister, addresses are harvested from hacking...