#rdns — Public Fediverse posts

.arpa, rDNS and a few magical ICMP hacks
https://sdomi.pl/weblog/24-arpa-hacks/
#ycombinator #arpa #rdns #dns #in_addr_arpa #ip6_arpa #reverse_dns #revdns #bad_apple #traceroute #mtr

.arpa, rDNS and a few magical ICMP hacks
https://sdomi.pl/weblog/24-arpa-hacks/
#ycombinator #arpa #rdns #dns #in_addr_arpa #ip6_arpa #reverse_dns #revdns #bad_apple #traceroute #mtr

.arpa, rDNS and a few magical ICMP hacks
https://sdomi.pl/weblog/24-arpa-hacks/
#ycombinator #arpa #rdns #dns #in_addr_arpa #ip6_arpa #reverse_dns #revdns #bad_apple #traceroute #mtr

.arpa, rDNS and a few magical ICMP hacks
https://sdomi.pl/weblog/24-arpa-hacks/
#ycombinator #arpa #rdns #dns #in_addr_arpa #ip6_arpa #reverse_dns #revdns #bad_apple #traceroute #mtr

欸！PTR 生效了，马上在这个段上建个实例（bushi

这不比什么 emoji 或者中文域名实例好玩（？

#ptr #ipv6 #rdns #dns

People say it's impossible to run a #mailserver today. Even if you're technically capable, all big providers will block you by default.

That's hardly true in my experience¹. If you're using clean IPs and recent anti-spam protocols², just the odd local telco will block you and that's usually sorted within hours by an email to their postmaster.

Just try it! #smtp #postfix #opensmtpd

¹) I'm doing this for decades now and have just set one up a few weeks ago
²) #MX #RDNS #SPF #DKIM #SRS #DMARC

@stefano Adoption of #IPv6 isn't a widespread problem any more... (there are some dinosaur #IPv4-only networks, but they're slowly dying...)

But: I'm not fine with what I get from an #ISP as a private consumer. I want the option to have a fixed prefix, I want to be able to get #RDNS delegation for that prefix.

That's why I currently ignore what my ISP gives me and instead use #HurricaneElectric's #Tunnelbroker for my IPv6 connectivity. It's free and offers the features I want 🙄

@murodegrizeco y'know what else is funny?

somebody reverted some (not all! but some!) of our NS ADDITIONAL records at the root servers _apparently_ so people have been getting outdated IP addresses from _two_ years ago for some of our _current_ nameservers even though everything _we_ have direct control over is correct.

this has been a funny day. it's been fuckin hilarious in fact

#admin #sysadmin #dns #rdns #HowDoesAnythingWork

OH GOOD the reason we're getting a zillion rDNS hits on our not-owned-by-us-for-15-years antique Class C is because the current owners PUT THE OLD INFINITY INTERNET PTR RECORDS BACK UP

#sysadmin #dns #rdns #HowDoesAnythingWork

@gabriel

Generally speaking, yes.

Here's s great 1 minute script to install #Postfix, #Dovecot, #OpenDKM, #SpamAssassin, etc., Complete with copypasta keys, Etc., And use the MXToolbox .com tools to check your MX RRs, #SPF, #rDNS, and you should be fine sending even to that shithole gmail:

https://github.com/LukeSmithxyz/emailwiz

It's a pretty awesome install. Waaay better than all that bloated moocow stuff.

I hope that helps!

#tallship #FOSS

⛵

.

Le reverse DNS ne s'actualise pas sur mon serveur #yunohost.

En local, j'arrive bien à avoir la bonne info avec un "dig -x IP". J'ai la bonne valeur aussi en testant depuis https://www.debouncer.com/reverse-dns-check mais pas moyen que le serveur en lui-même récupère la bonne info.

"dig -x" récupère l'ancien reverse dns (j'ai changé hier). Ça met longtemps à s'actualiser le #rDNS ?