Post #2098140
2023-06-24 18:28 UTC
Replies (4)
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@sindarina@ngmx.com 2024-03-02 18:54
ADDENDUM: If you need to generate reverse DNS records for IP addresses, DO NOT simply paste in the entire IPv4 address as the hostname, such as in this example; ❌ 198.51.100.1.net.example ❌ 198.51.100.2.net.example If you absolutely need to use dots, like for delegation within a large enterprise or to clients, reverse the string instead; ✅ 1.100.51.198.rev.net.example ✅ 2.100.51.198.rev.net.example Most to least specific, always. In the vast majority of cases, keep it simple, with something like this; ✅ ip-198-51-100-1.dhcp.net.example ✅ ip-198-51-100-2.dhcp.net.example Can be delegated if needs be, and is clearly separate.
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@lispi314@mastodon.top 2023-09-17 22:17
@sindarina 1.2.3.4 is cute and memorable though. They really should've reserved it, it would've been sensible. There's a reason the test phone numbers use all-5 sequences like (555) 555 XXXX. (Admittedly that really wasn't intentional and it just happened due to a number of reasons, but that's a detail.) I'm disappointed that wasn't a comment brought up when those RFCs were drafted.
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@sebastian@mastodon.cc 2024-12-31 15:41
@sindarina I hardly dare say it, but in a recent network deployment I assisted with, the head of IT had insisted real routable random IPs be used in their private network, as private ones were to easy to guess and thus abuse ... I shall not disclose where ...
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@oscherler@tooting.ch 2025-01-03 04:34
@sindarina Probably because they keep setting the same pattern: someone “alerts to bad habits” without any explanation of the reasons they’re bad habits, or worse, with judgmental comments like “I shouldn’t have to keep telling you this” or “I’m not going to explain why,” which makes their post not an “alerting to bad habits” one but a “asserting their superiority over less experienced people” one.