ipv6.md: mention IPv4 mapped addresses

Reported-by: Josh Soref Assisted-by: Jay Satiro Fixes #13112
curl · Mar 15, 2024 · 5c8dcbf · 5c8dcbf
1 parent 6ea7587
commit 5c8dcbf
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/docs/cmdline-opts/ipv6.md b/docs/cmdline-opts/ipv6.md
@@ -22,3 +22,7 @@ Example:
 
 Use IPv6 addresses only when resolving hostnames, and not for example try
 IPv4.
+
+Your resolver may respond to an IPv6-only resolve request by returning IPv6
+addresses that contain "mapped" IPv4 addresses for compatibility purposes.
+macOS is known to do this.