From c61ca433402876fefef1dab847acda1647b7dab9 Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Mon, 31 May 2021 08:33:44 +0200 Subject: [PATCH] URL-SYNTAX.md: document the new 'localhost' treatment --- docs/URL-SYNTAX.md | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/docs/URL-SYNTAX.md b/docs/URL-SYNTAX.md index ef4613383..a97eb0d9f 100644 --- a/docs/URL-SYNTAX.md +++ b/docs/URL-SYNTAX.md @@ -168,6 +168,15 @@ brackets). For example: http://[2001:1890:1112:1::20]/ +### "localhost" + +Starting in curl 7.77.0, curl will use loopback IP addresses for the name +`localhost`: `127.0.0.1` and `::1`. It will not try to resolve the name using +the resolver functions. + +This is done to make sure the host accessed is truly the localhost - the local +machine. + ### IDNA If curl was built with International Domain Name (IDN) support, it can also