Category Archives: Computer Security

Adding malicious IPs in DNSBLs to hosts.deny automatically

[See Adding malicious IPs in DNSBLs to iptables automatically for a new and improved version of this that uses iptables instead of hosts.deny, which is necessary since tcpwrappers is mostly deprecated at this point.] I run my own mail server, which means that there are hackers trying 24×7 to break into the server by connecting to… Read More: Adding malicious IPs in DNSBLs to hosts.deny automatically »

Let’s Encrypt with Synology NAS when you can’t open port 80

UPDATE [2022-02-06]: I’m fairly certain nothing in this blog posting is needed anymore with the current version of Synology’s NAS software (DSM). My NAS’s SSL certificate has been renewing automatically for quite a while now without my ever needing to use this script. I don’t know what mechanism DSM is now using to renew Let’s… Read More: Let’s Encrypt with Synology NAS when you can’t open port… »

We need a “/heartbleed.txt” standard, and we need it ASAP

Those of us who help create and maintain “the internet” that everyone benefits from are now tasked with helping the world recover with one of the biggest, if not the biggest, security holes in the history of the internet. To be certain they aren’t vulnerable, users need to change their passwords at every site that… Read More: We need a “/heartbleed.txt” standard, and we need it ASAP »

My email identity thief is at it again

See my previous articles on this topic. The email identity thief who has been using my email address on-line for years, who apparently goes by the name Diallo Mamadou Oury in real life, has just posted this inexplicable comment on my blog. I posted a response, but I somehow doubt he’ll read or respond to… Read More: My email identity thief is at it again »

Since Diallo Mamadou Oury is so insistent on sharing my personal information, here’s some of his

I have no idea why Diallo Mamadou Oury, who lives in Dakar, Senegal, insists on using my email address to sign up for services and web sites all over the Internet (previous postings). But since he apparently feels entitled to share my personal information without my consent, I have no compunctions about sharing his. Here’s… Read More: Since Diallo Mamadou Oury is so insistent on sharing my… »