Hmm I probably have the most ridiculous #robotstxt for a #Misskey instance right now lol. I just want to let #Mojeek and #Marginalia crawl #Makai and make sure to keep out #Google and the AI scrapers... :satrithink:
Just encountered the #EDIFACT standard while in touch with our logistics firm. Why the hell is this nothing readable and yet another useless standard that could've been implemented in #protobuf#json or something modern....
And the best part is everyone uses a subset or has some customizarions which forces us to implement it again and again
#sysadmin#cybersécuritay
Un type se connecte en IMAP sur TLS au serveur, depuis une machine en Chine, et se déconnecte avec l'alerte TLS "bad certificate".
C'est un certificat CAcert. S'il ne te plait pas, tu dégages !
#sysadmin
Un démon plantait à peu près tous les jours. Je mets en place un script qui teste s'il est toujours là et le démarre sinon, et, depuis, le démon ne plante plus (là, trois jours d'uptime). #Alpine
@mwl I'm not the audience for this campaign, as exemplified by my first thought when I read your post which was that it feels like it costs $10k to run your own mail server. 😅
Clear-eyed explanation of disastrous fragility in current technical systems, yet it’s also very funny. Plus discussion. Well worth your time, and good inspiration for systems builders/sysadmins.
Why Windows 10 might be gaining users at Windows 11’s expense, an old DHCP option is a potential risk for VPN users, we should probably say “renting” rather than “buying”domains, and avoiding tracking when using IPv6.
@sysop408 On the public internet, yes, but there is a lot of usefulness in internal networks having DNS and DHCP working together to get DHCP leases with co- termed A, AAAA, and PTR records. (Windows Server, Infoblox, Your Home Router). in-addr.arpa is the rabbit hole you (don’t) want to fall down, but I Am Not An IANA Lawyer
They are used somewhat more broadly as a reputational signal -- a PTR record and a A/AAAA that mutually agree imply that the domain and IP are probably controlled by the same entity. That's mostly useful for email, where the domain is critical.
If the PTR exists but the value doesn't point back to the same IP, that suggests the IP owner is trying to pretend to be associated with some domain (i.e. to trick a sysadmin looking at logs), which is a pretty negative signal for any type of traffic, and I've seen web application firewalls complain about it.
Not having a PTR at all should be pretty neutral outside of email.