overview for farthom

7

submitted 1 year ago by farthom@lemmy.ca to c/micromobility@lemmy.world

3 comments fedilink

I'm putting together my first ebike build out of an old mountain bike. I'm assembling the battery pack from scratch using salvaged 21700 cells. I don't imagine many people install fuses on their battery packs but given how violent these unprotected cells could be in the face of a short... I would sleep better at night if mine had one. Trouble is, I am having difficulty finding a suitable fuse. The vast majority of fuses I can locate online are automotive/marine/audio fuses usually maxing out at 32V. The pack I plan to build will be 14s lithium ion, and thus tops out at 58.8v. Has anyone else done a battery pack build with fuse? What fuse type/rating did you use? Where did you buy them? What brand?

Any info would be appreciated.

Thanks!!

Be careful. New platforms invite bad actors. by farthom in c/technology@beehaw.org

[-] farthom@lemmy.ca 1 points 1 year ago

Yeah, seems highly unlikely to ever yield any results. Even if you did manage to read a file, you have to get lucky finding a password hash in a rainbow table or the password being shit enough to crack.

Be careful. New platforms invite bad actors. by farthom in c/technology@beehaw.org

[-] farthom@lemmy.ca 10 points 1 year ago

Holy shit this is kind of unsettling. Though I would expect ALL major browsers to reject reading any local files like this..... would this kind of thing actually succeed somewhere/somehow?

Broken DNSSEC on lemmy.ca by farthom in c/lemmy_ca_support@lemmy.ca

[-] farthom@lemmy.ca 5 points 1 year ago

Thanks for the prompt reply!!

Things didn't immediately work, but if you had genuinely changed something I know DNS can take some time for things to trickle down as caches/TTLs expire etc etc etc.

I'm happy to report things appear to be working normally this morning. I'm glad this was just a transition hiccup and not an outright misconfiguration!

Thanks so much for all your hard work keeping this thing running for us!

8

Broken DNSSEC on lemmy.ca (lemmy.ca)

submitted 1 year ago by farthom@lemmy.ca to c/lemmy_ca_support@lemmy.ca

6 comments fedilink

Approx 30 mins ago, I suddenly lost access to lemmy.ca due to DNS resolution failures. I've managed to restore access by tossing the known good IP into my computers hosts file, in order to make this post.

It's worth noting I'm running my own DNS resolver (via PfSense router/firewall software) instead of the typical DNS forwarder offered by my ISP. As a result, my DNS ecosystem is likely a bit more fussy about the "correctness" of the DNS configuration.

My DNS server logs some entries complaining about DS and DNSKEY

debug: Failed to match any usable DS to a DNSKEY.
info: Could not establish a chain of trust to keys for lemmy.ca. DNSKEY IN

An attempt to verify the domain name using delv results in the following:

delv lemmy.ca 
;; broken trust chain resolving 'lemmy.ca/A/IN': 127.0.0.53#53
;; resolution failed: broken trust chain

Running an external DNSSEC check tool, currenly reports DNSSEC related issues. The tool I ran was:

https://dnssec-analyzer.verisignlabs.com/lemmy.ca

This gave me two issues:

None of the 2 DNSKEY records could be validated by any of the 2 DS records

The DNSKEY RRset was not signed by any trusted keys

Did something related to DNS get deployed in the last little while?

In any case, I've got a workaround in place and am not stuck, however a site admin may want to be aware of this information.

Thanks!!

How does a USB keyboard work? by farthom in c/technology@beehaw.org

[-] farthom@lemmy.ca 2 points 1 year ago

Before I even clicked the link, I was hoping it would lead to Ben Eater's video! I've gone through many tutorials/guides/videos on the subject of USB, and this video is the only one which really broke it down and presented it in a comprehensible manner.

I highly recommend all of his content if you are interested in electronics at all.