nanog mailing list archives
Re: Reverse DNS for eyeballs?
From: Lukas Tribus <lukas () ltri eu>
Date: Fri, 21 Apr 2023 16:03:17 +0200
Hello, without PTRs you will probably get your prefixes listed in things like Spamhouse PBL. So adding the correct PTR for a mailserver may not be enough, as services like that love to classify entire IP blocks. Of course Spamhaus provides the tools to fix this issue. But what if there are 4 - 5 other services like that? Do you want to go down that rabbit hole, everytime you turn up a mailserver in your prefix? I also think reverse DNS records are useful when you have discussions with content providers for all sorts of reasons like geolocation issues or "VPN" classifications. Of course whois/irr records are the proper tools for this. But if I have to discuss my IP ranges with some first level support desk at a large content provider, everything that stands out negatively will impact my chances of actually getting it done and how fast it will get done. Considering how subjective IP classifications are, I will not return NXDOMAIN for v4 addresses if there is even a small chance that it will make my life harder at some point in the future. Lukas
Current thread:
- Reverse DNS for eyeballs? Forrest Christian (List Account) (Apr 21)
- Re: Reverse DNS for eyeballs? Bill Woodcock (Apr 21)
- Re: Reverse DNS for eyeballs? Chris Adams (Apr 21)
- Re: Reverse DNS for eyeballs? Frank Habicht (Apr 21)
- Re: Reverse DNS for eyeballs? Mark Tinka (Apr 21)
- Re: Reverse DNS for eyeballs? Randy Bush (Apr 25)
- Re: Reverse DNS for eyeballs? Ca By (Apr 21)
- Re: Reverse DNS for eyeballs? Lukas Tribus (Apr 21)
- Re: Reverse DNS for eyeballs? Forrest Christian (List Account) (Apr 21)
- Re: Reverse DNS for eyeballs? Frank Habicht (Apr 21)
- Re: Reverse DNS for eyeballs? Mark Tinka (Apr 21)
- Re: Reverse DNS for eyeballs? heasley (Apr 21)
- Re: Reverse DNS for eyeballs? Jason Healy via NANOG (Apr 21)
- Re: Reverse DNS for eyeballs? Saku Ytti (Apr 21)
- Re: Reverse DNS for eyeballs? Chris Adams (Apr 21)
- <Possible follow-ups>
- Re: Reverse DNS for eyeballs? Willy Manga (Apr 22)