POTA, Parks On The Air, what is considered by many in the amateur space to be the gateway drug to either HF, amateur radio, or both. Probably no surprise, given that reputation, that the first actual time I’ve stepped up to a radio was, well, POTA. You don’t have to talk, you don’t have to spend too much time stressing out over everything, you just need to call and respond. Simple! And what did I get for the 6-ish hours I was out in a parking lot (with friends)? 92 contacts. One or two in Canada, and even one in Bulgaria!Continue reading
As if I didn’t need yet another hobby that assumes a relatively high amount of disposable income, as of July 17th, 2023 (ignore the date this goes out), I am now a licensed amateur radio operator. As of the 31st, I passed the element 4 exam,1 granting me the highest class of license available in the US: Amateur Extra. But, why? Well, why not?Continue reading
If you’ve clicked on this post itself, you’ll notice there’s a sound file at the top.
That’s because if you click it, or hit the
P key, you’ll hear… me, reading this!
I’m working on adding this to old posts one by one, so you might see that popping up eventually.
But, partially for accessibility, and partially just to make these sort of ramblings easier to take in while only half paying attention or just doing something else entirely, I’m putting audio narration on every post here that I can.
Fail2Ban is a wonderful tool for managing failed authentication or usage attempts for anything public facing.
However, by default, it’s not without it’s drawbacks: Fail2Ban uses
iptables to manage it’s bans, inserting a
--reject-with icmp-port-unreachable rule for each banned host.
The thing with this is that I use a fairly large amount of reverse-proxying on this network to handle things like TLS termination and just general upper-layer routing.
Since it’s the proxy that’s accepting the client connections, the actual server host, even if its logging system understands what’s happening (say, with PROXY protocol) and logs the real client’s IP address, even if Fail2Ban puts that IP into the
iptables rules, since that’s not the connecting IP, it means nothing.
What I really need is some way for Fail2Ban to manage it’s ban list, effectively, remotely.
Luckily, it’s not that hard to change it to do something like that, with a little fiddling.
So if you’ve not heard, there’s this website called AbuseIPDB, which, no affiliation, is a website where webmasters can submit reports of abusive IP addresses, and then query those reports, either manually, or using their REST API. And this is how I did exactly that, to help cut down some of the spam on my email server. Let’s get started.Continue reading
Federation, the driving name behind decentralized and self-hosted software. But what is ‘federation,’ really? Well, there’s the really complex answer, and the simple answer. The simple answer is that federation is when multiple unrelated instances of a piece of software are capable of communicating and sharing between one another. The long answer, well, if you want to see that, then…Continue reading
Yes, for once, I have not just some app for secure messaging, this time, it’s a protocol. OTR, or Off-the-Record Messaging, is a protocol for establishing end-to-end encrypted messaging between two participants over a standard instant messaging channel like IRC or XMPP (Jabber). It also allows for deniable authentication, where during the conversation you can be assured that only you two are talking, but after the conversation, there is no way for an outside third party to 100% prove you talked, since it’s theoretically possible for an attacker to have forged the communications record. It’s complicated, but not too hard to wrap your head around.Continue reading
So I take it some people reading this are familiar with what I’ll call a ‘remote filesystem protocol’ like NFS, SMB, or AFP. Well, did you know there’s one that’s found use in a few places and you’ve maybe heard of once or twice, and really… well, doesn’t sound like it should make any sense? Welcome to WebDAV. The remote filesystem that runs over HTTP.Continue reading
This is where I’d usually make some joke about “if you remember, back in the day…” but… given how Freenode and Libera have been in the news recently for Freenode’s rather hostile takeover (and suicide), You probably know what IRC is. So. IRC, or Internet Relay Chat, is a really old (as in, 1988) protocol for text-based communications between users on a network. And the cool part is, it’s so simple that it’s almost funny. Like, let’s take a look. You could actually, with only a few minutes of reading, just enter raw IRC protocol lines by hand and have a perfectly valid and functional session.Continue reading