mirror/becarpenter-book6
1
0
Fork 0
mirror of https://github.com/becarpenter/book6.git synced 2024-05-07 02:54:53 +00:00
Code Releases Activity

Disallow ULAs in global DNS

Browse Source
This commit is contained in:
Brian E Carpenter
2023-08-27 10:41:30 +12:00
committed by GitHub
parent 778f9cade7
commit 21bdc4e8da
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
2. IPv6 Basic Technology/DNS.md
+6
View File
@@ -52,6 +52,12 @@ concern:
to work in most cases, it is inappropriate if the host in question has
a valid IPv6 address, and pointless otherwise.
- Certain IPv6 address types should __never__ be visible in global DNS: ULAs
(starting with `fdxx:` or even `fcxx:`) or link-local (starting with
`fe80::`). Beware that automated mechanisms like Active Directory might
add ULAs to global DNS by default. Of course, it is OK to
include ULAs in _local_ DNS if a split DNS configuration is used.
Some statistics on AAAA records and reachability may be found at
[Dan Wing's site](https://www.employees.org/~dwing/aaaa-stats/).